Refine
Year of publication
Document Type
- Article (2185)
- Doctoral Thesis (345)
- Postprint (224)
- Review (30)
- Other (26)
- Monograph/Edited Volume (13)
- Conference Proceeding (13)
- Habilitation Thesis (12)
- Preprint (7)
- Part of a Book (1)
Language
- English (2857) (remove)
Keywords
- nanoparticles (28)
- self-assembly (22)
- DNA origami (19)
- Nanopartikel (19)
- biomaterials (19)
- Conformational analysis (14)
- block copolymers (14)
- ionic liquids (14)
- SERS (13)
- fluorescence (13)
- polymer (13)
- Palladium (12)
- Selbstorganisation (12)
- photochemistry (12)
- singlet oxygen (12)
- nanostructures (11)
- polymerization (11)
- ring-opening polymerization (11)
- synthesis (11)
- Fluorescence (10)
- Ionic liquids (10)
- LIBS (10)
- Nanoparticles (10)
- Polymer (10)
- conformational analysis (10)
- fluorescent probes (10)
- luminescence (10)
- metathesis (10)
- FRET (9)
- Ion mobility spectrometry (9)
- NMR (9)
- NMR spectroscopy (9)
- Synthetic methods (9)
- adsorption (9)
- carbohydrates (9)
- crystal structure (9)
- electrochemistry (9)
- gold nanoparticles (9)
- hydrogel (9)
- ruthenium (9)
- thermoresponsive (9)
- water (9)
- Arenes (8)
- DFT calculations (8)
- Hydrogel (8)
- RAFT (8)
- Theoretical calculations (8)
- Through-space NMR shieldings (TSNMRS) (8)
- click chemistry (8)
- crystallization (8)
- ionic liquid (8)
- isomerization (8)
- polymers (8)
- Adsorption (7)
- DNA radiation damage (7)
- Kinetics (7)
- NICS (7)
- SAXS (7)
- X-ray structure (7)
- anomalous diffusion (7)
- azobenzene (7)
- biomaterial (7)
- block copolymer (7)
- density functional calculations (7)
- dissociative electron attachment (7)
- living cells (7)
- low-energy electrons (7)
- porous materials (7)
- potassium (7)
- shape-memory effect (7)
- surface chemistry (7)
- surfactants (7)
- Anisotropy effect (6)
- Aromaticity (6)
- Carbohydrates (6)
- Click chemistry (6)
- Dynamic NMR (6)
- Fluorescence spectroscopy (6)
- Leguminosae (6)
- Oxygen heterocycles (6)
- Polymerchemie (6)
- Ring current effect (6)
- Synthese (6)
- Synthesis (6)
- X-ray (6)
- biodegradable polymers (6)
- catalysis (6)
- copper (6)
- crown compounds (6)
- energy storage (6)
- heterocycles (6)
- hydrogels (6)
- ion mobility spectrometry (6)
- mass spectrometry (6)
- morphology (6)
- polyelectrolyte (6)
- polyzwitterion (6)
- quantum dots (6)
- radical polymerization (6)
- silver nanoparticles (6)
- stimuli-sensitive polymers (6)
- surface modification (6)
- surface plasmon resonance (6)
- Block copolymers (5)
- Blockcopolymer (5)
- Blockcopolymere (5)
- EPR (5)
- Heterocycles (5)
- Janus emulsions (5)
- Lactams (5)
- Lactones (5)
- Metathesis (5)
- Organic Chemistry (5)
- Quantum chemical calculations (5)
- Raman spectroscopy (5)
- Ruthenium (5)
- X-ray diffraction (5)
- anthracenes (5)
- atomic force microscopy (5)
- biomass (5)
- biomineralization (5)
- carbon nitride (5)
- charge transfer (5)
- chitosan (5)
- copolymers (5)
- dynamic NMR (5)
- green chemistry (5)
- heteroatoms (5)
- heterogeneous catalysis (5)
- magnetic nanoparticles (5)
- membranes (5)
- metal-organic frameworks (5)
- micelles (5)
- microcontact printing (5)
- molecular rods (5)
- nanocomposite (5)
- oxidative stress (5)
- peroxides (5)
- photocatalysis (5)
- poly(lactic acid) (5)
- porous carbon (5)
- quantum chemical calculations (5)
- sensors (5)
- sodium (5)
- spectroscopy (5)
- sulfur (5)
- surface (5)
- thermoresponsive polymers (5)
- 3D printing (4)
- Antiplasmodial (4)
- Biaryls (4)
- Biomaterial (4)
- Bioraffinerie (4)
- Chitooligosaccharides (4)
- Chitosan (4)
- Cross-coupling (4)
- Crystal structure (4)
- Cytotoxicity (4)
- DFT (4)
- DNA (4)
- DNA Origami (4)
- DNA strand breaks (4)
- Degradation (4)
- Density functional calculations (4)
- Elektrokatalyse (4)
- Europium (4)
- Gold nanoparticles (4)
- HPLC (4)
- ICSS (4)
- IR-MALDI (4)
- Katalyse (4)
- Korrosion (4)
- Langmuir monolayer (4)
- Lumineszenz (4)
- Molecular dynamics (4)
- NCA (4)
- PCA (4)
- Photochemistry (4)
- Polymers (4)
- RAFT polymerization (4)
- Raman (4)
- Structure elucidation (4)
- TSNMRS (4)
- Tenside (4)
- Water (4)
- Zinc (4)
- antifouling (4)
- antiplasmodial (4)
- arenes (4)
- arsenolipids present (4)
- calcium phosphate (4)
- carbon (4)
- carbon nitrides (4)
- catalysts (4)
- cod-liver (4)
- composites (4)
- copper(II) (4)
- corrosion (4)
- cytotoxicity (4)
- dye removal (4)
- electron paramagnetic resonance (4)
- electron transfer (4)
- electrospinning (4)
- enzyme (4)
- fatty-acids (4)
- glucose oxidation (4)
- gold (4)
- hemocompatibility (4)
- hybrid materials (4)
- hydrolysis (4)
- identification (4)
- infection pathway (4)
- lanthanides (4)
- liposomes (4)
- lower critical solution temperature (4)
- macrocycles (4)
- manganese (4)
- membrane (4)
- mesenchymal stem cells (4)
- methyl orange (4)
- methylene blue (4)
- microfluidics (4)
- microgels (4)
- microparticles (4)
- models (4)
- multiblock copolymer (4)
- nachhaltige Chemie (4)
- nanolenses (4)
- nanoparticle (4)
- oxidation (4)
- palladium (4)
- perovskite solar cells (4)
- photooxygenation (4)
- photophysics (4)
- physiological consequences (4)
- plasmonics (4)
- poly(ethylene glycol) (4)
- polymer chemistry (4)
- polyzwitterions (4)
- poröse Materialien (4)
- proteins (4)
- radicals (4)
- selectivity (4)
- shape memory (4)
- sorption (4)
- structure elucidation (4)
- sustainable chemistry (4)
- systems (4)
- thermoresponsiv (4)
- visible-light (4)
- water treatment (4)
- wettability (4)
- zinc (4)
- Absorption (3)
- Alkylpyridinium salts (3)
- Antifouling (3)
- Base pairing (3)
- Bioelectrocatalysis (3)
- Biomasse (3)
- Biomimetic (3)
- Birch reduction (3)
- C-C coupling (3)
- Carbene ligands (3)
- Cellulose (3)
- Chitooligosaccharide (3)
- Conformational equilibrium (3)
- Copper (3)
- Cryo-SEM (3)
- Cycloaddition (3)
- Diodenlaserspektroskopie (3)
- Direct electron transfer (3)
- EPR spectroscopy (3)
- Electrochemistry (3)
- Electrospinning (3)
- Energiespeicher (3)
- Energy (3)
- FhuA (3)
- Fluoreszenz-Resonanz-Energie-Transfer (3)
- Förster resonance energy transfer (3)
- GIAO (3)
- Gas phase electron diffraction (3)
- HRTEM (3)
- Hyaluronic acid (3)
- Hydrogenation (3)
- Imaging (3)
- Immunoassay (3)
- Ionic Liquid (3)
- Ionic liquid (3)
- Kohlendioxid (3)
- Kohlenhydrate (3)
- Kohlenstoff (3)
- Kohlenstoffnitriden (3)
- Kolloid (3)
- LCST (3)
- Laser (3)
- Light scattering (3)
- Magnetic properties (3)
- Mass spectrometry (3)
- Massenspektrometrie (3)
- Metallnitride (3)
- Microemulsions (3)
- Molecular dynamics simulations (3)
- Molecular modeling (3)
- Mycobacterium tuberculosis (3)
- NBO analysis (3)
- Nanostructure (3)
- Nanotechnology (3)
- Phase transitions (3)
- Photochemie (3)
- Photoionisation (3)
- Photokatalyse (3)
- Pickering emulsions (3)
- Platinum group metals (3)
- Polyelektrolyte (3)
- Polymere (3)
- Quantum dynamics (3)
- REMPI (3)
- Rheology (3)
- SANS (3)
- Scattering (3)
- Second-Year Undergraduate (3)
- Solid-phase extraction (3)
- Spectroscopy (3)
- Sulfonamides (3)
- Surfactant micelles (3)
- Thermoresponsive (3)
- Thin film (3)
- ToF-SIMS (3)
- Trifluoromethanesulfonamide (3)
- Vesikel (3)
- Water treatment (3)
- X-ray scattering (3)
- [4+2] cycloaddition (3)
- ab initio calculations (3)
- actuation (3)
- artificial muscles (3)
- assemblies (3)
- auxiliary control (3)
- binding (3)
- biorefinery (3)
- calcium (3)
- calcium carbonate (3)
- carbon dots (3)
- cell adhesion (3)
- cellulose (3)
- colloids (3)
- complexes (3)
- configuration (3)
- conformation (3)
- controlled radical polymerization (3)
- crosslinking (3)
- cycloaddition (3)
- dynamics (3)
- electrochemical impedance spectroscopy (3)
- electron dynamics (3)
- emulsion (3)
- emulsion polymerization (3)
- endothelial cells (3)
- energy transfer (3)
- enzyme catalysis (3)
- enzymes (3)
- erosion (3)
- fluorescence lifetime (3)
- fluorescent dyes (3)
- functionalization (3)
- gas adsorption (3)
- gelatin (3)
- gels (3)
- glycopolymers (3)
- graphene (3)
- green (3)
- heterogene Katalyse (3)
- heterogene Photokatalyse (3)
- heterogeneous photocatalysis (3)
- hydrogen (3)
- interfaces (3)
- inverse micelles (3)
- ionic conductivity (3)
- ionothermal synthesis (3)
- iron (3)
- kinetics (3)
- langevin equation (3)
- ligand (3)
- liquid-phase catalysis (3)
- metal nitrides (3)
- methylmercury (3)
- micelle (3)
- microemulsion (3)
- microstructure (3)
- microwave irradiation (3)
- minerals (3)
- mixtures (3)
- molecules (3)
- monomer (3)
- monomers (3)
- nanoparticle dimers (3)
- nanotriangles (3)
- naphthalenes (3)
- nucleation (3)
- organosilica (3)
- oxygen (3)
- peptides (3)
- photoionization (3)
- photoisomerization (3)
- photon density wave spectroscopy (3)
- polyelectrolytes (3)
- polyesters (3)
- polymersomes (3)
- polypeptide (3)
- polysulfobetaine (3)
- probes (3)
- process analytical technology (3)
- protein (3)
- protein adsorption (3)
- protein self-assembly (3)
- quantum dynamics (3)
- random-walks (3)
- reaction mechanisms (3)
- rearrangement (3)
- redox chemistry (3)
- reduction (3)
- reference material (3)
- regioselectivity (3)
- resonance energy-transfer (3)
- roughness (3)
- sensitivity (3)
- shape (3)
- silica (3)
- simulations (3)
- single-particle tracking (3)
- size (3)
- smart materials (3)
- sodium hydroxide etching (3)
- soft robotics (3)
- soil (3)
- sol-gel (3)
- solubility (3)
- spider silk (3)
- stability (3)
- stereoselectivity (3)
- stokes shift (3)
- supercapacitors (3)
- surface functionalization (3)
- sustainability (3)
- tandem reaction (3)
- tandem reactions (3)
- temperature (3)
- tetrabromidocuprate(II) (3)
- theoretical chemistry (3)
- theoretische Chemie (3)
- thermal properties (3)
- thin films (3)
- upconversion (3)
- vesicles (3)
- water-soluble polymers (3)
- (Anti)aromaticity (2)
- 11-mercaptoundecanoic acid (2)
- 2-Azaspiro[4.5]deca-1-ones (2)
- 3-color fret (2)
- 3-mercaptopropionic acid (2)
- ADMET (2)
- AFM (2)
- AOT bilayer (2)
- APCI (2)
- ATCUN motif (2)
- ATRP (2)
- Abbau (2)
- Adsorbent (2)
- AgI (2)
- Aktuator (2)
- Alkynes (2)
- Amides (2)
- Ammoniak (2)
- Amphiphilic polymers (2)
- Anisotropic effect (2)
- Anisotropy (2)
- Anthraquinone (2)
- Antimicrobial (2)
- Antiplasmodial activity (2)
- Arenesulfonamides (2)
- Asphodelaceae (2)
- Asteraceae (2)
- Azobenzene (2)
- Bacteria (2)
- Barrier to ring inversion (2)
- Beschichtungen (2)
- Bindung (2)
- Biocompatible polymers (2)
- Biomass (2)
- Biomaterials (2)
- Biomimetics (2)
- Biopolymer (2)
- Boric acid (2)
- C1N1 (2)
- Caenorhabditis elegans (2)
- Calcium phosphate (2)
- Calcium phosphates (2)
- Carbenes (2)
- Carbon (2)
- Cd-free (2)
- Charge transfer (2)
- Chelatoaromaticity (2)
- Chitinase (2)
- Cis- and trans-form (2)
- Cluster (2)
- Cobalt (2)
- Colloid Chemistry (2)
- Composites (2)
- Configuration (2)
- Confocal microscopy (2)
- Conformation (2)
- Copper(II) (2)
- DBD dyes (2)
- DNA damage (2)
- DNA damage response (2)
- DNA nanotechnology (2)
- DNA repair (2)
- DR-UV-Vis (2)
- Degradable (2)
- Density functional theory (2)
- Depsipeptide (2)
- Diastereoselectivity (2)
- Drug design (2)
- Dynamic NMR spectroscopy (2)
- ESR (2)
- Electrocatalysis (2)
- Electrospray ionization (2)
- Elektronendynamik (2)
- Emulsion (2)
- Energietransfer (2)
- Energy storage (2)
- Escherichia coli (2)
- Extraction (2)
- Fiber (2)
- Flavanone (2)
- Flavone (2)
- Fluorescence imaging (2)
- Fluorescent probes (2)
- Fokker-Planck equations (2)
- Formgedächtnis (2)
- Fragmentation (2)
- Functionalization (2)
- Funktionalisierung (2)
- Funktionalisierung <Chemie> (2)
- Förster-Resonanzenergietransfer (2)
- G quadruplexes (2)
- Gasadsorption (2)
- Gelatin (2)
- Glycosylation (2)
- Gold (2)
- Grenzflächen (2)
- Grüne Chemie (2)
- H-1 NMR (2)
- HDAC1 (2)
- Heck reaction (2)
- Homogeneous catalysis (2)
- Hybrid materials (2)
- Hydrocarbons (2)
- Hydrogels (2)
- Hydrothermale Karbonisierung (2)
- Hypoxia (2)
- ITC (2)
- InP (2)
- InPZnS (2)
- Interfacial tension (2)
- Ionenmobilitätsspektrometrie (2)
- Ionische Flüssigkeiten (2)
- Ionization (2)
- Ionogels (2)
- Iso-chemical-shielding surfaces (ICSS) (2)
- Isoflavone (2)
- Isotopenverhältnis (2)
- Janus droplets (2)
- Juvenile hormone (2)
- Kaolinite (2)
- Katalysatoren (2)
- Kohlenstoffmaterialien (2)
- Kohlenstoffnitride (2)
- Kolloidchemie (2)
- Komposite (2)
- Kristallisation (2)
- LCST behavior (2)
- Langmuir monolayers (2)
- Lanthanide (2)
- Lanthanides (2)
- Lanthanoide (2)
- Laser-SNMS (2)
- Ligand design (2)
- Lignin (2)
- Lipide (2)
- Luminescence (2)
- MS (2)
- Macrocycles (2)
- Maltose-modified PEI (2)
- Maltose-modified poly(ethyleneimine) (2)
- Mars (2)
- Mechanical properties (2)
- Mechanism (2)
- Membrane (2)
- Mesokristalle (2)
- Metabolomics (2)
- Michael addition (2)
- Microemulsion (2)
- Microwave chemistry (2)
- Mikrofluidik (2)
- Mineralization (2)
- Mizelle (2)
- Mizellen (2)
- Molecular orientation (2)
- Molekulardynamik (2)
- Monoschicht (2)
- Monte-Carlo simulations (2)
- Multiblock copolymer (2)
- Multiple light scattering (2)
- N ligands (2)
- N-2 reduction (2)
- NMR structure (2)
- Nanokomposite (2)
- Nanoparticle (2)
- Nanostructures (2)
- Nanostrukturen (2)
- Nanotechnologie (2)
- Natural products (2)
- Network structure (2)
- Nicotinamide (2)
- Niobium (2)
- OTDR (2)
- Oberflächenchemie (2)
- Oligo(epsilon-caprolactone) (2)
- Oligosaccharides (2)
- On-demand release (2)
- Organic chemistry (2)
- Oxidation (2)
- P ligands (2)
- PEI coating (2)
- PLA (2)
- PLS regression (2)
- PLSR (2)
- Peptide (2)
- Peptides (2)
- Perylene (2)
- Pesticides (2)
- Phase morphology (2)
- Phospholipid (2)
- Photon Density Wave spectroscopy (2)
- Photon density wave spectroscopy (2)
- Photopolymerization (2)
- Photosynthesis (2)
- Plasmodium falciparum (2)
- Plasmonik (2)
- Podanthus mitiqui (2)
- Poly(epsilon-caprolactone) (2)
- Polyampholytes (2)
- Polyelectrolytes (2)
- Polyelektrolyt (2)
- Polyethyleneimine (2)
- Polymer chemistry (2)
- Polymerisation (2)
- Polypeptid (2)
- Polyzwitterion (2)
- Porous carbon (2)
- Porous silicon (2)
- Porphyrins (2)
- Process analytical technology (2)
- Protein (2)
- Push-pull character (2)
- Push-pull effect (2)
- QDs (2)
- Quantenpunkt (2)
- Quantenpunkte (2)
- Quantum dots (2)
- RAFT-Polymerisation (2)
- ROMP (2)
- RP-HPLC (2)
- RUNX2 (2)
- Rearrangement (2)
- Regeneration (2)
- Renewable resources (2)
- Ring-opening polymerization (2)
- Roots (2)
- SEM (2)
- SERS enhancement factor (2)
- SPR (2)
- Salts (2)
- Salz (2)
- Salzschmelze-Templating (2)
- Selektivität (2)
- Selenium (2)
- Self-assembly (2)
- Sensors (2)
- Shadowgraphy (2)
- Shape-memory (2)
- Shape-memory effect (2)
- Shape-memory polymer (2)
- Simulation (2)
- Sol-Gel (2)
- Solvent effects (2)
- Solvothermal synthesis (2)
- Spektroskopie (2)
- Spin probes (2)
- Stereochemistry (2)
- Steric effect (2)
- Struktur (2)
- Sulphoxide (2)
- Supramolecular chemistry (2)
- Surface exudates (2)
- Surface functionalization (2)
- Surfactant (2)
- Surfactants (2)
- Synthesis and processing (2)
- TD-DFT (2)
- TEM (2)
- TRLFS (2)
- Taft equation (2)
- Temperature-memory effect (2)
- Tephrosia purpurea (2)
- TiO2 nanoparticles (2)
- Transmembranprotein (2)
- UV (2)
- UVR (2)
- Ultrazentrifuge (2)
- WAXS (2)
- Wasser (2)
- X-ray photoelectron spectroscopy (2)
- XPS (2)
- Zwitterionen (2)
- ab initio (2)
- absorbtion fine-structure (2)
- acids (2)
- acinar-cells (2)
- activated carbon (2)
- activated urethane derivatives (2)
- adduct formation (2)
- air-water interface (2)
- aldehydes (2)
- ammonia synthesis (2)
- amorphous carbon (2)
- amorphous polymers (2)
- anchor peptides (2)
- anisotropic effects (2)
- anthracene (2)
- anti-fouling materials (2)
- antimicrobial polymers (2)
- antioxidants (2)
- aptamers (2)
- aqueous dispersion (2)
- aqueous-solution (2)
- aromaticity (2)
- arsenious acid (2)
- assembly (2)
- atropisomerism (2)
- attachment (2)
- augmented-wave method (2)
- azobenzenes (2)
- batteries (2)
- betaine (2)
- biocompatibility (2)
- biomarker (2)
- biorefineries (2)
- biosensors (2)
- bladder-cancer (2)
- bone tissue engineering (2)
- boronic acid (2)
- bottlebrush copolymers (2)
- bottom-up (2)
- bottom-up fabrication (2)
- brownian-motion (2)
- cadmium-free (2)
- calcium influx (2)
- calcium phosphate hybrid material (2)
- cancer (2)
- carbohydrate derivatives (2)
- carbohydrate‐ based (2)
- carbon dioxide (2)
- carbon materials (2)
- carbon monoxide (2)
- carbon-dioxide (2)
- carbon-dioxide capture (2)
- carboxyanhydrides (2)
- carcinogen exposure (2)
- carotenoids (2)
- catalyst (2)
- cathode (2)
- cell-death (2)
- cement admixtures (2)
- cement hydration (2)
- cementitious material (2)
- charge transport (2)
- chemistry (2)
- chemoradiation therapy (2)
- chiral recognition (2)
- chromoionophore (2)
- citric acid (2)
- clusters (2)
- coating (2)
- coatings (2)
- cobalt nanoparticles (2)
- cockroach salivary-glands (2)
- colloid (2)
- coloring agents (2)
- composite materials (2)
- concrete (2)
- construction (2)
- controlled polymerization (2)
- copolymerization (2)
- copper complex (2)
- copper-bearing minerals (2)
- coumarins (2)
- cross-linking (2)
- cryo-electron microscopy (2)
- cryogel (2)
- crystal structures (2)
- crystallization behavior (2)
- crystals (2)
- cyclic voltammetry (2)
- cytosine methylation (2)
- damage (2)
- degradation (2)
- dendrimers (2)
- density functional theory (2)
- detector development (2)
- diazo compounds (2)
- dielectric spectroscopy (2)
- dienes (2)
- diimine-complexes (2)
- dimerization (2)
- dimerization of 4-nitrothiophenol (2)
- diode laser spectroscopy (2)
- dip-coating (2)
- disulfide (2)
- dna coiling (2)
- donor-acceptor systems (2)
- drug delivery system (2)
- drug discovery (2)
- drugs (2)
- dye (2)
- dye adsorption (2)
- dye mixture (2)
- dyes/pigments (2)
- dynamic HPLC (2)
- electrocatalysis (2)
- electrolytes (2)
- electron-transfer (2)
- electropolymerization (2)
- electrostatic interactions (2)
- elemental composition (2)
- ellipsometry (2)
- endoperoxides (2)
- enthalpy-entropy compensation (EEC) (2)
- enzyme reactions (2)
- europium (2)
- excision-repair (2)
- excitation (2)
- excited states (2)
- excluded volume (2)
- explosives (2)
- exposure (2)
- fiber Bragg gratings (2)
- fiber actuators (2)
- fiber etching (2)
- fiber-optical sensors (2)
- fibers (2)
- films (2)
- fish (2)
- flight search patterns (2)
- fluctuation-dissipation theorem (2)
- fluorescence correlation spectroscopy (2)
- fluorescence photobleaching recovery (2)
- fluorescent dyemonomers (2)
- foam (2)
- folding kinetics (2)
- fractional dynamics approach (2)
- frameworks (2)
- fronts (2)
- functional (2)
- g-quadruplex (2)
- gas (2)
- gas chromatography (2)
- gas permeation (2)
- gas sensing (2)
- gas-phase (2)
- gaussian processes (2)
- gene-expression (2)
- gene-regulation kinetics (2)
- genomic dna methylation (2)
- germacrane sesquiterpene lactone (2)
- glycolipids (2)
- gold nanoparticle assembly (2)
- gold nanostructures (2)
- gold nanotriangles (2)
- grafting-from (2)
- graphite (2)
- green polymers (2)
- grüne Chemie (2)
- hela-cells (2)
- hepcidin-25 (2)
- heteroatom-doped carbons (2)
- hierarchical porosity (2)
- hierarchische Porosität (2)
- human-cells (2)
- hybrid perovskites (2)
- hydrogen bonds (2)
- hydrogenation (2)
- hydrophilic polymers (2)
- hydrothermal (2)
- hydroxyl-functional poly(2-vinyl pyridine) (2)
- iPLS regression (2)
- imidazolium (2)
- immunoassay (2)
- in-situ (2)
- in-vitro (2)
- indicators (2)
- induced malignant-transformation (2)
- initio molecular-dynamics (2)
- inorganic perovskites (2)
- interactions (2)
- interferometry (2)
- intermittent chaotic systems (2)
- intracellular na+ (2)
- intracellular-transport (2)
- ion exchange (2)
- ion optodes (2)
- ionic liquid crystals (2)
- ionic liquid precursors (2)
- ionische Flüssigkeiten (2)
- ionogel (2)
- ionogels (2)
- ionophore (2)
- ketones (2)
- kontrollierte Polymerisation (2)
- kontrollierte radikalische Polymerisationen (2)
- lactones (2)
- laser-induced breakdown spectroscopy (2)
- lasso (2)
- levy flights (2)
- lifetime microscopy (2)
- ligand exchange (2)
- ligands (2)
- light (2)
- light-programmable viscosity (2)
- lignocellulosic biomass (2)
- liquids (2)
- lithium-sulfur battery (2)
- lithography (2)
- low-temperature NMR spectroscopy (2)
- lubricant (2)
- magnetic manipulation (2)
- magnetische Nanopartikel (2)
- magnetite nanoparticles (2)
- maleimide (2)
- marine oils (2)
- mass-spectrometry (2)
- materials science (2)
- mechanical strength (2)
- mercaptocarboxylic acids (2)
- mesocrystals (2)
- mesoporous materials (2)
- metabolites (2)
- metal (2)
- metal complex (2)
- metal coordination (2)
- metal oxides (2)
- metal peptide (2)
- metal species (2)
- metallic nanolattices (2)
- metallopeptide (2)
- metalloprotein (2)
- methyltransferases dnmt3a (2)
- microemulsions (2)
- microporous organic polymers (2)
- microscopy (2)
- microwave synthesis (2)
- miniemulsion (2)
- modeling (2)
- modified Mannich reaction (2)
- molecular dynamics (2)
- molecular oxygen (2)
- molecular switches (2)
- molecular thermometers (2)
- molecular-mechanisms (2)
- molecularly imprinted polymers (2)
- molekulare Schalter (2)
- monolayer formation (2)
- mu-DSC (2)
- multiple light scattering (2)
- multishell (2)
- nanoclusters (2)
- nanocomposites (2)
- nanoflowers (2)
- nanoreactor (2)
- nanostructure fabrication (2)
- naphthalenophanes (2)
- naphthalimide (2)
- natural products (2)
- negative ions (2)
- neurodegenerative diseases (2)
- neurotoxicity (2)
- nickel (2)
- nonaqueous synthesis (2)
- nonlinear optics (2)
- nutrients (2)
- oil (2)
- oligodepsipeptides (2)
- optical sensing (2)
- optical-properties (2)
- optimal control theory (2)
- organic chemistry (2)
- organic dye pigments (2)
- organic ligand (2)
- organic synthesis (2)
- organic–inorganic hybrid (2)
- organische Synthese (2)
- oxaloacetic acid (2)
- oxygen heterocycles (2)
- oxygen reduction reaction (2)
- oxygenation (2)
- pH-responsive (2)
- palmitoylation (2)
- paper (2)
- patchy particles (2)
- perfluorocarbon emulsion (2)
- periplaneta-americana (2)
- phase morphology (2)
- phase transfer (2)
- phase-transitions (2)
- phenols (2)
- phosgene-free synthesis (2)
- photo-dehydro-Diels-Alder reaction (2)
- photochromism (2)
- photofragmentation (2)
- photoluminescence (2)
- photon-counting statistics (2)
- photonic crystals (2)
- photonic wires (2)
- photooxidation (2)
- photoswitches (2)
- pickering emulsion (2)
- platelets (2)
- poly(ADP-ribose) polymerase-1 (2)
- poly(N-isopropyl acrylamide) (2)
- poly(N-vinylcaprolactam) (2)
- poly(dimethylsiloxane) (2)
- poly(epsilon-caprolactone) (2)
- poly(ionic liquid) (2)
- polyampholyte (2)
- polybutadiene (2)
- polydimethylsiloxane wrinkles (2)
- polyester (2)
- polyesterurethanes (2)
- polylactide (2)
- polymer degradation (2)
- polymeric sensors (2)
- polypeptides (2)
- polypeptoids (2)
- polysoaps (2)
- polystyrene-block-poly(4-vinylpyridine) (2)
- polysulfabetaine (2)
- poly‐ ε ‐ caprolactone (2)
- porosity (2)
- porous carbon materials (2)
- porous silicon (2)
- post-polymerization modification (2)
- precision agriculture (2)
- properties (2)
- protein binding (2)
- protein carbonyls (2)
- protein-phenol interactions (2)
- protein-polymer conjugate (2)
- proximal soil sensing (2)
- purity (2)
- quantum chemistry (2)
- racemization (2)
- radiation therapy (2)
- radiosensitizers (2)
- rare earth elements (2)
- rat (2)
- ratiometric (2)
- reaction monitoring (2)
- reactive oxygen species (2)
- reactivity (2)
- recognition (2)
- recombinant protein (2)
- redox polymers (2)
- renewable resources (2)
- repair (2)
- resistive heating (2)
- resonant formation (2)
- responsive (2)
- responsive polymers (2)
- reversible addition fragmentation chain transfer (RAFT) (2)
- reversible shape-memory actuator (2)
- review (2)
- ringöffnende Polymerisation (2)
- rp-hplc (2)
- salt (2)
- salt melt templating (2)
- salts (2)
- samples (2)
- scale (2)
- sclerotization (2)
- self-assembled monolayers (2)
- self-healing (2)
- sensor (2)
- separation (2)
- sequence dependence (2)
- sers (2)
- shape-memory (2)
- shape-memory polymer (2)
- shape-memory polymers (2)
- shape‐memory polymer actuators (2)
- silica nanoparticles (2)
- single-molecule analysis (2)
- single-strand breaks (2)
- sodium green (2)
- soft actuators (2)
- soft-templating (2)
- soil nutrients (2)
- solvatochromism (2)
- solvent effect (2)
- sortase-mediated ligation (2)
- spatial-organization (2)
- spectroscopic ellipsometry (2)
- spent coffee (2)
- spiked and crumble gold nanotriangles (2)
- step (2)
- stereocomplexation (2)
- stereoselective-synthesis (2)
- strand breakage (2)
- structure (2)
- substituent effects (2)
- supercapacitor (2)
- superparamagnetic (2)
- supported gold (2)
- supramolecular chemistry (2)
- surface-enhanced Raman scattering (2)
- surfaces (2)
- switches (2)
- synthetic biology (2)
- system (2)
- tandem solar cells (2)
- tannic acid (2)
- tetrapyrroles (2)
- thermo-responsive polymers (2)
- thermochemistry (2)
- thermodynamics (2)
- thermoplastics (2)
- thermoresponsive Polymere (2)
- thermoresponsive materials (2)
- thermoresponsive polymer (2)
- thermosensitive (2)
- thimerosal (2)
- thio-dimethylarsinic acid (2)
- thrombogenicity (2)
- tight-binding (2)
- time random-walks (2)
- time-dependent configuration interaction (2)
- tin-rich ITO (2)
- transition (2)
- transmembrane protein (2)
- triangular-[4] phenylene (2)
- trivalent (2)
- ultra-fast laser inscription (2)
- ultrafast (2)
- undulated (2)
- upconversion nanoparticles (2)
- upper critical solution temperature (2)
- ventricular myocytes (2)
- vesicle (2)
- vitro toxicological characterization (2)
- wavelength (2)
- weak ergodicity breaking (2)
- wrinkled stamps (2)
- yolk@shell materials (2)
- zwitterionic group (2)
- zwitterions (2)
- "Reactive Flux" Ratenkonstanten (1)
- "Spacer"-Gruppe (1)
- "click" chemistry (1)
- "water-in-salt" (1)
- (+)-Tephrodin (1)
- (1)H NMR (1)
- (13)C NMR (1)
- (NMR) (1)
- (S)-Elatadihydrochalcone (1)
- (S)-Lupinifolin 4´-methyl ether (1)
- (TSNMRS) (1)
- ) (1)
- -Acetoxy esters (1)
- 1 (1)
- 1,1-dimethyl-1,2,3,4-tetrahydrosiline (1)
- 1,2,3-triazoles (1)
- 1,2,4-Dithiazole (1)
- 1,2-Disulfonamides (1)
- 1,2-Dithiole (1)
- 1,2-Dithiosquarate,1,2-Dithiosquaratonickelate (1)
- 1,2-diboretane-3-ylidene (1)
- 1,2-dithiooxalate (1)
- 1,2-dithiosquarate (1)
- 1,2-dithiosquaratometalate (1)
- 1,3-Azasilinanes (1)
- 1,3-Dienes (1)
- 1,3-Dimethyl-3-phenyl-1,3-azasilinane (1)
- 1,3-Oxasilinanes (1)
- 1,4,2-Oxazasilinanes (1)
- 1,5-Dienes (1)
- 1-(Dimethylamino)-1-phenyl-1-silacyclohexane (1)
- 1-Methylthio-1-phenyl-1-silacyclohexane (1)
- 10-Methoxy-10,7 '-(chrysophanol anthrone)-chrysophanol (1)
- 1D structures (1)
- 2 (1)
- 2'-bipyridine (1)
- 2,10-Bis-(3-aminopropyloxy)dibenzo[aj]perylene-8,16-dione (1)
- 2,2-Disubstituted adamantane derivatives (1)
- 2-Alkylidene-4-oxothiazolidine (1)
- 2-Dicyanoethene-1 (1)
- 2-Dithiooxalate (1)
- 2-Dithiosquarate (1)
- 2-Hydroxyethylammonium 1-R-indol-3-ylsulfanylacetates (1)
- 2-Substituted adamantane derivatives (1)
- 2-Thiodisaccharide (1)
- 2-Thiodisaccharides (1)
- 2-deoxy-D-ribose-5-phoshphate aldolase (1)
- 2-dithiolate (1)
- 2-oxazoline (1)
- 2D films (1)
- 2D material (1)
- 2D materials (1)
- 2D-LC-MS/MS (1)
- 2D-Material (1)
- 2P cross section (1)
- 3,4-Dihydroisoquinoline (1)
- 3,4-Propylenedioxythiophene (1)
- 3,4-dihydro-2H-pyran (1)
- 3,4-dihydro-2H-thiopyran (1)
- 3,6-Diazabicyclo[3.1.0]hexanes (1)
- 3,8-Diazabicyclo[3.2.1]octane (1)
- 3-Fluoro-3-methyl-3-silatetrahydropyran (1)
- 3-Hydroxyisoflavanone (1)
- 3-Oxo-14 alpha, 15 alpha-epoxyschizozygine (1)
- 3-Silatetrahydropyrans (1)
- 3-silathianes (1)
- 315 nm (1)
- 3D (1)
- 3D electrode structures (1)
- 3D flower superstructures (1)
- 3D printed flow-cell (1)
- 3D structure (1)
- 3D-printing (1)
- 3c,2e-bonding (1)
- 4 (1)
- 4'-Bis(tert-butyl)-2 (1)
- 4,4 '-Bis(tert-butyl)-2,2 '-bipyridine (1)
- 4,4-dimethyl-3,4-dihydro-2H-1,4-thiasiline (1)
- 4-Nitrophenol (1)
- 4-Oxothiazolidine (1)
- 4-Substituted cyclohexanones (1)
- 4-methylene-cyclohexyl pivalate (1)
- 4-nitrophenol (1)
- 4-silapiperidines (1)
- 4-silathianes (1)
- 473 nm (1)
- 4D NOESY (1)
- 4D-actuation (1)
- 5'-neolignane (1)
- 5-Hexadecanoylaminofluorescein (1)
- 5-Hydroxy-3,6-dimethoxy-2-methylnaphthalene-1,4-dione 5,8-Dihydroxy-3-methoxy-2-methylnaphthalene-1,4-dione (1)
- 6 alpha-Hydroxy-alpha-toxicarol (1)
- 6-Mercaptopurine (1)
- 6-disilamorpholines (1)
- 8 (1)
- 8-oxohobartine (1)
- 9-Arylfluorenes (1)
- 946 nm (1)
- A-values of COOAr on cyclohexane (1)
- ABC triblock copolymer (1)
- ACC (1)
- ADC(2) (1)
- ADMET polymerization (1)
- ALTONA equation (1)
- AM1 calculations (1)
- AOT (1)
- AOT/BDAC micelles (1)
- ATR-FTIR (1)
- Ab initio MO computations (1)
- Ab initio quantum chemical methods and calculations (1)
- Ab-initio calculations (1)
- Acetone process (1)
- Acetylpolyamine amidohydrolases (1)
- Acids (1)
- Activation parameters (1)
- Actuation (1)
- Actuator (1)
- Actuators (1)
- Additive (1)
- Additive manufacturing (1)
- Additivity of conformational energies (1)
- Adipocyte (1)
- Adsorbatschwingungen (1)
- Adsorption isotherm (1)
- Adsorption kinetic (1)
- Adsorption models (1)
- Adsorption of uremic toxins (1)
- Adsorptionsaktivität (1)
- Aerogele (1)
- Aerogels (1)
- Aerophobicity (1)
- African medicinal plants (1)
- Afrikanische Heilpflanzen (1)
- Ag/peptide@SiO(2) nanostructures (1)
- AgAu alloy nanoparticles (1)
- Ageing (1)
- Aggregation (1)
- Air bubble repellence (1)
- Aktivierungsentropie (1)
- Alcohols (1)
- Aldehyde oxidase (1)
- Aldehydes (1)
- Aldol condensation (1)
- Alkenes (1)
- Alkenyl cyclohexanone (1)
- Alkenyl cyclohexenone (1)
- Alkylation (1)
- Alkylpyridinium-Salze (1)
- All-Carbon-Kompositen (1)
- Allylamides (1)
- Allylic compounds (1)
- Allylic oxidation (1)
- Aloe secundiflora (1)
- Aloesaponarin I (1)
- Alternating polyampholytes (1)
- Alumina (1)
- Aluminiumlegierung (1)
- Aluminiumoberfläche (1)
- Amin (1)
- Amine (1)
- Amines (1)
- Amino acid N-carboxyanhydride (1)
- Amino acids (1)
- Aminonaphthol (1)
- Aminonaphthols (1)
- Aminosäuren (1)
- Ammonia (1)
- Amphiphile (1)
- Amphiphiles (1)
- Amphiphilic Polymers (1)
- Amphiphilic diblock copolymers (1)
- Amyloid peptide (1)
- Analogies/Transfer (1)
- Analysis scattering kernel (1)
- Analytische Ultrazentrifugation (1)
- Angle-dependent X-ray induced photoelectron spectroscopy (1)
- Anionic surfactant (1)
- Anisotrope Kolloide (1)
- Anisotropic gold nanoplatelets (1)
- Annelation effect (1)
- Annulation (1)
- Anode (1)
- Anodes (1)
- Anomerization (1)
- Anserine (1)
- Anthracene (1)
- Anti-HIV (1)
- Anti-Plasmodial activity (1)
- Anti-aromaticity (1)
- Anti-inflammatory (1)
- Antibody (1)
- Antibody binding (1)
- Anticancer (1)
- Antifouling surfaces (1)
- Antikörper-Färbung (1)
- Antileishmanial (1)
- Antimalarial drug detection (1)
- Antimalarial plants (1)
- Antimicrobial activities (1)
- Antioxidant (1)
- Antiretroviral drugs (1)
- Apoptosis (1)
- Aptamer (1)
- Arabica coffee (1)
- Arabidopsis (1)
- Aristotelia chilensis (1)
- Aromatic compounds (1)
- Aromatic or quinonoid (1)
- Artemisinin (1)
- Aryllithium compounds (1)
- Assemblierung (1)
- Assignment of stereochemistry (1)
- Atom Transfer Radical Polymerization (1)
- Atropisomerism (1)
- Atropselecrivity (1)
- Au nanoarrays (1)
- Aufarbeitung von Fruktose (1)
- Aufkonversion (1)
- Auger electron spectroscopy (1)
- Automated data evaluation (1)
- Axial chirality (1)
- Azadironolide (1)
- Azobenzol (1)
- B,N heterocycles (1)
- B3LYP/6-31+G(d,p) calculations (1)
- B3LYP/6-311++G** (1)
- BBTP (1)
- Ball milling (1)
- Bariumtitanat (1)
- Barrier to rotation about C-N bond (1)
- Basis sets (1)
- Beer mashing (1)
- Benetzung (1)
- Bentonite clay (1)
- Benzazepine (1)
- Benzenoid structure (1)
- Benzenoid structures (1)
- Benzoboroxol (1)
- Benzoic acid esters (1)
- Benzyne-allene or cumulene-like structure (1)
- Berry Phase (1)
- Berry-Phase (1)
- Beschallung (1)
- Beschichtungsanwendung (1)
- Beta-Lactoglobulin (1)
- Betaines (1)
- Betulin (1)
- Biflavonoid (1)
- Bifunctional catalysts (1)
- Binding assay (1)
- Binding pocket position (1)
- Bio-inspired mineralization (1)
- Bioactive surfaces (1)
- Biobased Polymers (1)
- Biobasierte Polymere (1)
- Biochemistry (1)
- Biochromophore (1)
- Bioconjugation (1)
- Biohybrid-Membran (1)
- Bioinspiration (1)
- Bioinspired (1)
- Biokompatibilität (1)
- Biokonjugate (1)
- Biokonjugation (1)
- Biological Sciences (1)
- Biological activity (1)
- Biomarker (1)
- Biomasseverwertung (1)
- Biomaterialien (1)
- Biomimetic sensors (1)
- Biomimetik (1)
- Biomineralisation (1)
- Biomineralisierung (1)
- Biomineralization (1)
- Biomodification (1)
- Biomolecular interactions (1)
- Biomolecules coupling (1)
- Biophotonik (1)
- Biophysical chemistry (1)
- Biopolymer material (1)
- Biopolymers (1)
- Biorefinery (1)
- Biosensor (1)
- Biosensoren (1)
- Bioseparation (1)
- Biosynthesis (1)
- Birth Weight (1)
- Block Copolymer (1)
- Block-Copolymere (1)
- Block-copolymer (1)
- Blockcopolymervesikel (1)
- Bodengas (1)
- Bombyx mori silk (1)
- Bone repair material (1)
- Books (1)
- Born-Oppenheimer MD (1)
- Boron exposure (1)
- Boronsäure (1)
- Bottom-up fabrication (1)
- Bound states (1)
- Bragg coherent x-ray diffractive imaging (1)
- Breakthrough (1)
- Breakthrough curve (1)
- Breakthrough time (1)
- Brewster angle microscopy (1)
- Brewsterwinkel-Mikroskopie (1)
- Brownian motion (1)
- Bulbine frutescens (1)
- Bulk-mediated diffusion (1)
- C (1)
- C-13 (1)
- C-13 NMR (1)
- C-13 NMR spectroscopy (1)
- C-13 chemical shift (1)
- C-13 chemical shift difference Delta delta(C C) (1)
- C-13 chemical shifts (1)
- C-C Bindungsknüpfung (1)
- C-C bond formation (1)
- C-H activation (1)
- C-reactive (1)
- C-reactive protein (1)
- C. bonducella (1)
- C2N (1)
- C3N (1)
- C3N5 (1)
- C?H oxidation (1)
- CAL-72 osteoblasts (1)
- CAM-B3LYP (1)
- CC2 calculations (1)
- CH center dot center dot center dot O hydrogen bonds (1)
- CN (1)
- CN materials (1)
- CN-Materialien (1)
- CO2 capture (1)
- CO2-Abscheidung (1)
- CXNY (1)
- Cadmium (1)
- Calcium (1)
- Calciumcarbonat (1)
- Campylobacter jejuni (1)
- Cancer (1)
- Car-Parrinello (1)
- Carbamoyl tetrazoles (1)
- Carbazole (1)
- Carbene or zwitterions (1)
- Carbide (1)
- Carbides (1)
- Carbohydrate (1)
- Carbohydrate mimics (1)
- Carbon materials (1)
- Carbonitrides (1)
- Carbonization (1)
- Carboxyfluorescein (1)
- Carboxylic -acids (1)
- Carboxyrhodamine (1)
- Carica papaya seeds (1)
- Cartilage repair (1)
- Carvotacetones (1)
- Cassiamin A (1)
- Cassiamin B (1)
- Castor oil (1)
- Catalysis (1)
- Catalysts (1)
- Catalytic reaction (1)
- Cation exchange Capacity (1)
- Cationic surfactants (1)
- Cavity ring-down spectroscopy (1)
- Ce/Zr (1)
- Celastraceae (1)
- Cell engineering (1)
- Cell staining (1)
- Cellular uptake (1)
- Cer Ammonium Nitrat (CAN) (1)
- Cereals (1)
- Ceric Ammonium Nitrate (CAN) (1)
- Ceroxid (1)
- Chalkogenide (1)
- Characterisation (1)
- Charakterisierung (1)
- Chelates (1)
- Chelation effect (1)
- Chemical Sensors (1)
- Chemical Synthesis (1)
- Chemical calculations (1)
- Chemical dynamics (1)
- Chemical shift assignment (1)
- Chemie (1)
- Chemische Synthese (1)
- Chemotaxonomy (1)
- Chiral auxiliaries (1)
- Chiral dopants (1)
- Chiralität <Chemie> (1)
- Chitolectins (1)
- Chitolektine (1)
- Chitosanase (1)
- Chlorophyll b (1)
- Cholesterin (1)
- Chromatographie (1)
- Chromophores (1)
- Chronic kidney disease (1)
- Chronic kidney disease (CKD) (1)
- Cinnamylidene acetic acid (1)
- Citrazinsäure (1)
- Claisen rearrangement (1)
- Classical MD (1)
- Clay-polymer nanocomposite - CPN (1)
- Click Chemistry (1)
- Cluster chemistry (1)
- Cluster model (1)
- Co-Nonsolvency (1)
- Co-expression (1)
- Coating Applications (1)
- Cobalt Nanopartikeln (1)
- Coffee beans (1)
- Coherences (1)
- Coherent states (1)
- Collaborative/Cooperative Learning (1)
- Collagen (1)
- Collagen-binding peptide (1)
- Collagenase (1)
- Collision cross-section (1)
- Colloidal lithography (1)
- Composite adsorbents (1)
- Composite hydrogels (1)
- Computational chemistry (1)
- Condensed thiazolidines (1)
- Confinement (1)
- Conformation analysis (1)
- Conformational equilibria (1)
- Conical Intersections (1)
- Contact angle (1)
- Continuum properties (1)
- Controlled polymer synthesis (1)
- Controlled polymerization (1)
- Coordination modes (1)
- Coordination polymers (1)
- Copolymere (1)
- Copper Metal Complexes (1)
- Copper(II) complexes (1)
- Core-shell-corona micelles (1)
- Corpora allata (1)
- Correlation function (1)
- Corylus avellana L. (1)
- Coumaronochromone (1)
- Coumestan (1)
- Counterions (1)
- Cross coupling (1)
- Cross-coupling reactions (1)
- Cross-metathesis (1)
- Crosslinking (1)
- Cryo-TEM (1)
- Crystal and molecular structure (1)
- Crystal packing (1)
- Crystal structures (1)
- Crystallization (1)
- Crystallography (1)
- CsPbI3 (1)
- Cu doped InP (1)
- Cu-dotiertes InP (1)
- CuO (1)
- Curriculum (1)
- Cyanine/merocyanine-like structures (1)
- Cyclazines (1)
- Cyclic GMP (1)
- Cyclobutylcarbene (1)
- Cyclodienes (1)
- Cyclohexyl esters (1)
- Cyclophanes (1)
- Cyclotella (1)
- C− H activation (1)
- D. melleri (1)
- DBD (1)
- DELLA (1)
- DFT and MP2 calculations (1)
- DFT and MP2 simulation (1)
- DFT calculation (1)
- DFT theoretical calculations (1)
- DFTB3 (1)
- DLS (1)
- DMSO (1)
- DNA Nanostrukturen (1)
- DNA Schädigung (1)
- DNA complexation (1)
- DNA copolymers (1)
- DNA nanostructures (1)
- DNA origami nanostructures (1)
- DNA polyplexes (1)
- DNA recognition (1)
- DNA release (1)
- DNA-Origami (1)
- DNA-PEI polyplexes (1)
- DNS (1)
- DOHaD (1)
- DOPA (1)
- DSC (1)
- Dalbergia melanoxylon (1)
- Dark reactions (1)
- Dative vs. coordinative NHC -> BR3 bond (1)
- Debus-Radziszewski polymerization (1)
- Decontamination (1)
- Decorin (1)
- Defects (1)
- Defektchemie (1)
- Defekte (1)
- Deformation (1)
- Dehydration (1)
- Dehydro[n]annulenes (1)
- Delta-Kohn Sham method (1)
- Delta-Kohn-Sham (1)
- Density-matrix (1)
- Densityfunctional theory (1)
- Deoxyfructosazin (1)
- Dependent light scattering (1)
- Depolymerization (1)
- Depth profiling (1)
- Derris trifoliata (1)
- Design (1)
- Designed Biointerfaces (1)
- Designte Biointerface (1)
- Desorption (1)
- Desorption kinetics (1)
- Desymmetrization (1)
- Detektor (1)
- Detektor-Entwicklung (1)
- Detektorentwicklung (1)
- Detergents (1)
- Diagnostics (1)
- Diaminomaleonitrile (1)
- Diamondoide (1)
- Dianellin (1)
- Diastereomers assignment (1)
- Diatom (1)
- Diazonium salts (1)
- Dichtematrixtheorie offener Systeme (1)
- Dielectric properties (1)
- Differential mobility analysis (DMA) (1)
- Differentielle Mobilitätsanalyse (DMA) (1)
- Diffusion processes (1)
- Diffusionsbarriere (1)
- Dihydrobenzofurane (1)
- Dihydroxyaceton (1)
- Dilatations-Viskoelastizität (1)
- Dimensionsstabilität (1)
- Dimer (1)
- Dimeric anthraquinone (1)
- Diode laser (1)
- Discrete variable representation (1)
- Dispersion (1)
- Dissipation-Decoherence (1)
- Dissipation-Dekohärenz (1)
- Dissoziation (1)
- Dissoziative Elektronenanlagerung (1)
- Distance (1)
- Distance Learning (1)
- Disulfide (1)
- Diterpenoid (1)
- Docking (1)
- Docking study (1)
- Dodonaea angustifolia (1)
- Domino reactions (1)
- Doping (1)
- Doppelschichtstruktur (1)
- Doppelstrangbruch (1)
- Doppelt hydrophile Blockcopolymere (1)
- Double exponential model (1)
- Drop morphology (1)
- Drop profile analysis tensiometry (1)
- Drug Delivery (1)
- Drug loading (1)
- Drug metabolism (1)
- Dual Scale Factors (1)
- Dual scale factors (1)
- Dual-Responsiveness (1)
- Dynamic H-1-NMR (1)
- Dynamic HPLC (1)
- Dynamic equilibrium (1)
- Dynamic light scattering (1)
- Dynamik der Adsorption (1)
- E. coli (1)
- E. schliebenii (1)
- EIS (1)
- ERF (1)
- ESI (1)
- ESI-MS (1)
- ESR spectroscopy (1)
- Ecological risk assessment (1)
- Ecotoxicology (1)
- Einkapselung (1)
- Einkristalle (1)
- Einzelatomkatalyse (1)
- Einzelmoleküldetektion (1)
- Einzelstrangbruch (1)
- Eisen (1)
- Eisen-Kohlenstoff-Nanoröhrchen-Katalysatoren (1)
- Electro-synthesized molecularly imprinted polymer (1)
- Electroactive Conjugated Polymer (1)
- Electrochemical sensor (1)
- Electrodeposition (1)
- Electron dynamics (1)
- Electronic materials (1)
- Electrosensing (1)
- Electrospray Ionization (1)
- Electrostatic effects (1)
- Elektrochemie (1)
- Elektrolytempfindlichkeit (1)
- Elektronenkorrelation (1)
- Elektronentomographie (1)
- Elektrospinnen (1)
- Ellipsometry (1)
- Emulsification (1)
- Emulsion Polymerization (1)
- Emulsion destabilization (1)
- Emulsionen (1)
- Emulsions (1)
- Emulsionspolymerisation (1)
- Enantioselectivity (1)
- Enegieanwendungen (1)
- Energiespeichermechanismus (1)
- Energieumwandlung (1)
- Energy Applications (1)
- Energy Transfer (1)
- Energy transfer (1)
- Energy-transfer probe (1)
- Enzym (1)
- Enzymatic degradation (1)
- Enzymatic milk coagulation (1)
- Enzymatic polymer degradation (1)
- Enzyme (1)
- Enzyme catalysis (1)
- Enzyme inhibitor (1)
- Enzymes (1)
- Equilibrium (1)
- Equilibrium constants (1)
- Equisetum hyemale (1)
- Erneuerbare Ressourcen (1)
- European pear (1)
- Eutectic mixture (1)
- Excimer (1)
- Exciplex (1)
- Excited state proton transfer (1)
- Excited-state calculations; (1)
- External mass transfer (1)
- Extracellular Matrix (1)
- Extraction system development (1)
- Extrazelluläre Matrix (1)
- F-19 (1)
- F-C coupling constants (1)
- F12 methods (1)
- FAPbBr(3) (1)
- FLIM (1)
- FLNS (1)
- FSH (1)
- Fabry-Perot etalon (1)
- Falten (1)
- Farbstoff (1)
- Faser (1)
- Fastener (1)
- Fatty acids (1)
- Ferrofluid (1)
- Festkörperstruktur (1)
- Festphasensynthese (1)
- Fettsäure (1)
- Fettsäuren (1)
- Fiber-optical spectroscopy (1)
- Field flow fractionation (1)
- Filtration (1)
- First-Year Undergraduate/General (1)
- Fischer-Tropsch Synthesis (1)
- Fischer-Tropsch-Synthese (1)
- Fixed bed (1)
- Flexible linker (1)
- Fluorchemie (1)
- Fluorescence anisotropy (1)
- Fluorescence correlation (1)
- Fluorescence correlation spectroscopy (1)
- Fluorescence life time (1)
- Fluorescence lifetime (1)
- Fluorescence lifetime probes (1)
- Fluorescent dyes (1)
- Fluorescent nanoconjugate (1)
- Fluoreszenz (1)
- Fluorierte Blockcopolymere (1)
- Fluoroassay (1)
- Fluorpolymere (1)
- Flüssig-/flüssig-Grenzflächen (1)
- Flüssigkeitszerstäubung (1)
- Flüssigphasenkatalyse (1)
- Formate (1)
- Formation constant (1)
- Formgedächtnispolymer (1)
- Formose (1)
- Forster resonance energy transfer (FRET) (1)
- Forster resonance energy transfer (FRET) system (1)
- Forster resonance energy transfer(FRET) (1)
- Fourier-transform infrared (1)
- Freistehende Membranen (1)
- Frequenzaufkonversion (1)
- Fruit quality (1)
- Function by design (1)
- Functional organic materials (1)
- Fungi (1)
- Funktionalisierung von Katalysatoren (1)
- Furans (1)
- Fusarium proliferatum (1)
- Fusicoccane diterpenes (1)
- Fällungsreaktion (1)
- Förster Resonanz Energie Transfer (1)
- Förster-Resonanz-Energie-Transfer (1)
- G-quadruplexes (1)
- GC-MS (1)
- GIAO calculations (1)
- GIXD (1)
- GOIP (1)
- GP2 isoform alpha (1)
- Gadolinium (1)
- Games; (1)
- Gas Sorption (1)
- Gas chromatography (1)
- Gas phase (1)
- Gas sorption (1)
- Gas-phase electron diffraction (1)
- Gas-sorption (1)
- Gaseous Ions (1)
- Gaspermeation (1)
- Gate-effects (1)
- Gel polymer (1)
- Gelatin-chitosan composites (1)
- Gelatin-chitosan scaffolds (1)
- Gelatine (1)
- Gele (1)
- Gelieren (1)
- Generalized Langevin oscillator model (1)
- Genetics (1)
- Gestational diabetes (1)
- Gleichgewicht der Adsorption (1)
- Glucose (1)
- Glukose Oxidation (1)
- Glukoseoxidation (1)
- Glycol podands (1)
- Glycopeptoid (1)
- Glycoproteins (1)
- Glycosidation (1)
- Glycosides (1)
- Glycosylierung (1)
- Glykochemie (1)
- Glykogele (1)
- Glykokonjugat (1)
- Glykokonjugate (1)
- Glykolipide (1)
- Glykomonomer (1)
- Glykopeptid (1)
- Glykopolymer (1)
- Glykopolymer-Elektrolyt (1)
- Glykopolymere (1)
- Glykoproteine (1)
- Glykosylierung (1)
- Gold cluster (1)
- Gold nanostructure (1)
- Gold nanotriangles (1)
- Gold surface (1)
- Gold surfaces (1)
- Gold triangles (1)
- Gold-Kohlenstoff-Katalysatoren (1)
- Goldnanopartikel (1)
- Grafting-from polymerization (1)
- Graphen (1)
- Graphitic carbon nitride (1)
- Green Chemistry (1)
- Green rust (1)
- Green synthesis (1)
- Grenzfläche Lösung/Tetradecan (1)
- Grenzflächenaktivität (1)
- Grenzflächenchemie (1)
- Gripper (1)
- Grotthuss mechanism (1)
- Group Transfer polymerisation (1)
- Guatemala (1)
- H-1 (1)
- H-1 NMR spectroscopy (1)
- H. pubescens (1)
- H2O2 (1)
- HAART (1)
- HALS (1)
- HER (1)
- HIV (1)
- HMF oxidation (1)
- Halogenation (1)
- Halogenid-Perowskite (1)
- Hammett-Brown plots (1)
- Hapten (1)
- Hard carbons (1)
- Hard sphere model in the Percus-Yevick Approximation (1)
- Health (1)
- Heavy metal ions (1)
- Heck coupling (1)
- Heck reactions (1)
- Helicen (1)
- Hemiporphyrazines (1)
- Heparin (1)
- Hepatic clearance (1)
- Hepcidin (1)
- Heptazine (1)
- Herbicide (1)
- Heteroatom Doping (1)
- Heteroatom-Dotierung (1)
- Heteroatom-Modifikation (1)
- Heteroatom-dotierte Kohlenstoffe (1)
- Heterogeneous catalysis (1)
- Heterophase Polymerization (1)
- Heterophasenpolymerisation (1)
- Hexadecyltrimethylammonium bromide (1)
- Hexagons and nanorods (1)
- High School/Introductory Chemistry (1)
- High-cell-density culture (1)
- High-harmonic generation (1)
- High-power lasers (1)
- High-resolution spectrometer (1)
- High-throughput (1)
- Highly functionalized dimeric triglycerides (1)
- Histone deacetylases (1)
- Hofmeister (1)
- Hohlkugeln (1)
- Hollow Spheres (1)
- Holzmodifikation (1)
- Human donor blood (1)
- Human sulfite oxidase (1)
- Humic acid (1)
- Humic substances (1)
- Humor (1)
- Humor/Puzzles/Games (1)
- Hyalophora cecropia (1)
- Hyaluronsäure (1)
- Hybrid clay (1)
- Hybrid material (1)
- Hybrid materials synthesis (1)
- Hydroborierung (1)
- Hydrogel disks (1)
- Hydrogel microparticles (1)
- Hydrogel microspheres (1)
- Hydrogele (1)
- Hydrogelen (1)
- Hydrogen Bonds (1)
- Hydrogen Production (1)
- Hydrogen activation (1)
- Hydrogen bonds (1)
- Hydrogen peroxide (1)
- Hydrogen sulfide (1)
- Hydrogen-bonding (1)
- Hydrogenolyse (1)
- Hydrolyse (1)
- Hydrolytic degradation (1)
- Hydrolytic stability (1)
- Hydrophobic (1)
- Hydrophobin (1)
- Hydrophobizität (1)
- Hydrothermal Carbonization (1)
- Hydrothermal carbonisation (1)
- Hydrothermalkohle (1)
- Hydrotrope (1)
- Hydroxyapatit (1)
- Hydroxyethyl starch (HES) (1)
- Hydroxyl (1)
- Hydroxymethylfurfural (1)
- Hypertension (1)
- Hyphenated techniques (1)
- Hypoestes verticillaris (1)
- Hypoosmotic stress (1)
- IFT (1)
- IMS (1)
- IR and Raman spectra (1)
- IR excitation (1)
- IR-Anregung (1)
- IRRAS (1)
- ISA (1)
- Ibuprofen (1)
- Imidazolate Frameworks Potsdam (1)
- Imidazole (1)
- Imidazolium (1)
- Immobilization (1)
- Immunoactive properties (1)
- In situ (1)
- In situ coating (1)
- In vitro (1)
- In vivo imaging system (IVIS) (1)
- In vivo-in vitro correlation (1)
- In-line monitoring (1)
- In-situ neutron reflectivity (1)
- InP nanowires (1)
- Inductively coupled plasma mass spectrometry (1)
- Inflammation (1)
- Infrared matrix-assisted laser desorption ionization (IR-MALDI) (1)
- Infrared spectroscopy (1)
- Ink (1)
- Insulating films (1)
- Interchain interactions (1)
- Interfacial equilibrium (1)
- Internet (1)
- Interphase behavior (1)
- Intracellular bacteria (1)
- Ion exchange (1)
- Ion mobility spectrometry (IMS) (1)
- Ionen (1)
- Ionenmigration (1)
- Ionenmobilitäts-Berechnungen (1)
- Ionenmobilitätspektrometrie (1)
- Ionenmobilitätsspektrometry (IMS) (1)
- Ionic conductivity (1)
- Ionic monomers (1)
- Ionic selectivity (1)
- Ionic strength (1)
- Ionisationspotential (1)
- Ionisierungsenergie (1)
- Ionogel (1)
- Iron (1)
- Iron oxide (1)
- Iron/silver microflowers (1)
- Irradiation (1)
- Iso-chemical shielding surfaces (ICSS) (1)
- Isocyanates (1)
- Isoflavanones (1)
- Isoflavonoide (1)
- Isolations (1)
- Isothermal Titration Calorimetry (1)
- Isotherme Titrationskalorimetrie (1)
- Isothermen (1)
- Isothiocyanic acid (1)
- Isotop (1)
- Isotope detection (1)
- Isotope effect (1)
- Isotope exchange (1)
- Isotope ratio (1)
- Isotope ratios (1)
- JH-III-specific carrier protein (1)
- Jahn-Teller distortion (1)
- Janus (1)
- Janus drops (1)
- Janus emulsion (1)
- Journals (1)
- Juvenile hormone analogue (1)
- Karbonisierung (1)
- Karbonnitrid Ionothermalsynthese (1)
- Katalysator (1)
- Kathode (1)
- Kenusanone F 7-methyl ether (1)
- Keramik (1)
- Kern-Schale Aufkonvertierende Nanopartikel (1)
- Kerndynamik (1)
- Kernspin-Statistiken (1)
- Ki67 (1)
- Kinetic analysis (1)
- Kinetic model (1)
- Kinetically controlled nanocrystal growth (1)
- Kinetik (1)
- Klassiche Simulationen (1)
- Kleinwinkelstreuung (1)
- Klick-Chemie (1)
- Klickchemie (1)
- Kniphofia foliosa (1)
- Knipholone cyclooxanthrone (1)
- Koaleszenz (1)
- Kohlenmaterialien (1)
- Kohlenmonoxid (1)
- Kohlenstoff-Nanopunkte (1)
- Kohlenstoff-Punkte (1)
- Kohlenstoffe auf Biomasse-Basis (1)
- Kohlenstoffmaterial (1)
- Kohlenstoffnitrid (1)
- Kohlenstoffnitrid (CN) (1)
- Kohlenstoffträger (1)
- Kol (1)
- Kollagen (1)
- Kollagenase (1)
- Komplexe (1)
- Kompositmaterial (1)
- Konformationsänderungen (1)
- Konischen Durchschneidungen (1)
- Koordinationskomplexe (1)
- Korrelationsfunktion (1)
- Kraft lignin hydrogenolysis (1)
- Kraftlignin (1)
- Kraftsensoren (1)
- Kristallisation von Dünnschichten (1)
- Kryo-Elektronenmikroskopie (1)
- L-929 fibroblasts (1)
- L-Cysteine (1)
- L-selectin (1)
- LC composites (1)
- LC polymer (1)
- LC-MS/MS (1)
- LCPs (1)
- LCST and UCST (1)
- LCST und UCST (1)
- LC−MS/MS (1)
- LED (1)
- LH (1)
- LSPR (1)
- Lactose (1)
- Ladung Transport (1)
- Lake Peten-Itza (1)
- Langmuir Monoschicht (1)
- Langmuir layers (1)
- Langmuir monolayer degradation technique (1)
- Langmuir technique (1)
- Langmuir thin-films (1)
- Langmuir-Schaefer method (1)
- Langmuir-Schafer films (1)
- Langmuir-Schäfer-Methode (1)
- Lannea rivae (1)
- Lannea schweinfurthii (1)
- Lanthanide ions (1)
- Lanthano (1)
- Laponite (1)
- Large Stokes shifts (1)
- Large Stokes-shifts (1)
- Large-size (1)
- Laser ablation (1)
- Laser induced desorption (1)
- Laser ionization (1)
- Laser-Carbonization (1)
- Laser-induced breakdown spectroscopy (1)
- Laser-induced breakdown spectroscopy (LIBS) (1)
- Laserinduzierte Inkandeszenz (LII) (1)
- Laserinduzierte Plasmaspektroskopie (LIBS) (1)
- Laserkarbonisierung (1)
- Laserpulse (1)
- Laserpulskontrolle (1)
- Lasers (1)
- Lattice Boltzmann methods (1)
- Layer-by-Layer Glykopolymerbeschichtung (1)
- Layer-by-layer (1)
- Learning/Chemistry Education Research (1)
- Lectin (1)
- Legierungen (1)
- Leishmania (1)
- Lektin (1)
- Leptinotarsa decemlineata (1)
- Levoglucosenol (1)
- Levy flights (1)
- Li-Ionen-Akkus (1)
- Li-Ionen-Kondensator (1)
- Li-S batteries (1)
- Li-S-Batterien (1)
- Li-ion batteries (1)
- Li-ion capacitor (1)
- LiFePO4 (1)
- Ligation (1)
- Light-harvesting complex II (1)
- Lignane (1)
- Lignans (1)
- Limonoid (1)
- Linienspannung (1)
- Lipid domain (1)
- Liquid chromatography (1)
- Liquid dispersion (1)
- Liquids (1)
- Lithiophilizität (1)
- Lithium ion battery (1)
- Lithium-Ionen-Kondensatoren (1)
- Lobelia tupa (1)
- Local density friction approximation (1)
- Localized surface plasmon resonance (1)
- Locust (1)
- Locusta migratoria (1)
- Low field MRI (1)
- Low temperature NMR spectroscopy (1)
- Low-temperature C-13 and Si-29 NMR (1)
- Low-temperature NMR (1)
- Low-temperature d-NMR (1)
- Lucigenin (1)
- Luminescence spectroscopy (1)
- Lupinifolin (1)
- Lysophosphatidylcholine (1)
- Lysotrackers (1)
- Lysozyme (1)
- Lävulinsäure (1)
- Löschung (1)
- Lösungsmittel-thermisches Tempern (1)
- Lösungsmitteleffekte (1)
- Lösungsprozess (1)
- M062X/6-311G** calculations (1)
- MACE (1)
- MALDI-TOF mass spectrometry (1)
- MALDI-ToF MS (1)
- MAPbX3 (1)
- MD simulations (1)
- MOF-derived catalysts (1)
- MP2 (1)
- MP2 and CCSD(T) calculations (1)
- MP2 calculations (1)
- MQAE (1)
- MSDA (1)
- Macrocyclic li-gands (1)
- Macromolecular architecture (1)
- Macrophage (1)
- Magnetic (1)
- Magnetic composites (1)
- Magnetic-responsive (1)
- Magnetisch (1)
- Magnetit Nanopartikel (1)
- Magnetite (1)
- Magnetite and gold nanoparticles (1)
- Magnetite nanoparticles (1)
- Magnetite-gold nanoparticles (1)
- Magnetization measurements (1)
- Magnetotactic bacteria (1)
- Main text (1)
- Makrozyklen (1)
- Malaria (1)
- Male (1)
- Mammea usambarensis (1)
- Mammea-type coumarins (1)
- Manganese (1)
- Manipulation of Emulsion Stability (1)
- Marangoni flow (1)
- Marangoni-Fluss (1)
- Markov processes (1)
- Mass Spectrometry (1)
- Mass transfer (1)
- Mass transfer zone (1)
- Materials Chemistry (1)
- Materialwissenschaft (1)
- Matrix IR spectrum (1)
- Matrix metalloproteinase (1)
- Matrix-unterstützte Laser-Desorption/Ionisation (IR-MALDI) (1)
- Matsuda-Heck reaction (1)
- Maytenus boaria (1)
- Maytenus disticha (1)
- Maytenus spp. (1)
- Melt crystallization (1)
- Membranforschung bzw. Membranwissenschaften (1)
- Mesh size (1)
- Mesh ultra-thin layer (1)
- Mesomeric equilibrium of carbene/zwitterion (1)
- Mesomerism (1)
- Mesopores (1)
- Mesoporosity (1)
- Mesoporosität (1)
- Mesoporous materials (1)
- Mesoporöse Materialien (1)
- Metal Chalcogenides (1)
- Metal complexation (1)
- Metal-free polymerization (1)
- Metal-organic framework (1)
- Metal-proton exchange reaction (1)
- Metalation (1)
- Metall (1)
- Metall-organische Gerüste (1)
- Metallcarbide (1)
- Metallchalkogenide (1)
- Metallnitrid-Kohlenstoff Komposite (1)
- Metallorganischen (1)
- Metalloxide (1)
- Methacrylat (1)
- Methacrylate (1)
- Methane (1)
- Methanogens (1)
- Methylmercury (1)
- Micellar polymers (1)
- Micr (1)
- Microalgae (1)
- Microfluidics (1)
- Microindentation (1)
- Microorganism (1)
- Microparticles Reagentless assay (1)
- Microperoxidase (1)
- Micropolarity (1)
- Micropollutants (1)
- Micropores (1)
- Microporosity (1)
- Microstructure (1)
- Microviscosity (1)
- Mikroalgen (1)
- Mikroemulsion (1)
- Mikroemulsionen (1)
- Mikrogel-Array (1)
- Mikrogele (1)
- Mikrogelketten (1)
- Mikrogelstränge (1)
- Mikrokapseln (1)
- Mikrokontaktdruck (1)
- Mikrotomographie (1)
- Mikrowellensynthese (1)
- Millettia dura (1)
- Millettia dura; (1)
- Millettia lasiantha (1)
- Millettia leucantha (1)
- Millettia micans (1)
- Millettia oblata ssp teitensis (1)
- Miniaturized cultivations (1)
- Miniemulsion (1)
- Mitochondrial ROS (1)
- Mixed-valent compounds (1)
- Mixtures (1)
- Mizellbildung (1)
- Modeling (1)
- Modellierung (1)
- Modelling (1)
- Modified Mannich reaction (1)
- Modified mycotoxins (1)
- Modified polymer resin (1)
- Modifizierung von Polymeren (1)
- Molecular (1)
- Molecular Collisions (1)
- Molecular Probe (1)
- Molecular biophysics (1)
- Molecular diversity (1)
- Molecular dynamics simulation (1)
- Molecular dynamics with friction (1)
- Molecular interaction design (1)
- Molecular rod (1)
- Molecular rods (1)
- Molecular structure (1)
- Molecular weight (1)
- Molecules (1)
- Molekulare Kollisionen (1)
- Molybdoenzymes (1)
- Monolayer (1)
- Monolayers (1)
- Monolith (1)
- Monomers (1)
- Monte Carlo (1)
- Monte-Carlo (1)
- Morpholindione (1)
- Morphologie von Kapseln (1)
- Morphology (1)
- Multi-Wellenlängen (1)
- Multi-drug resistance (1)
- Multi-method (1)
- Multiblock Copolymer (1)
- Multiblock copolymers (1)
- Multicompartment micelles (1)
- Multifunctional polyester networks (1)
- Multifunctionality (1)
- Multilayers (1)
- Multivariate data analysis (1)
- Mundulea sericea (1)
- Muonic molecules (1)
- Muschelnachahmend (1)
- Mycotoxins (1)
- N (1)
- N-2 fixation (1)
- N-Alkylglycin (1)
- N-acetyl cysteine (1)
- N-acetyl glucosamine derivatives (1)
- N-acetyldopamine (1)
- N-alkyl-glycine (1)
- N-azobenzylchitosan (1)
- N-butylpyridinium bromide (1)
- N-carboxyanhydrid (1)
- N-carboxyanhydride (1)
- N-doped carbon (1)
- N-dotierter Kohlenstoff (1)
- N-heterocyclic carbenes (NHC) (1)
- N-methylnicotinamide (1)
- N-triflyl guanidines (1)
- N-unsubstituted (primary)S-thiocarbamates (1)
- N-unsubstituted(primary)O-thiocarbamates (1)
- N2 fixation (1)
- N2-Fixierung (1)
- NBO and STERIC analyses (1)
- NBO/NCS analysis (1)
- NHC (1)
- NHCs (1)
- NICE-2014 (1)
- NIPAAm (1)
- NIR spectroscopy (1)
- NTF (1)
- Na+ homeostasis (1)
- Na+-K+-2Cl(-) cotransporter (1)
- Nachhaltigkeit (1)
- Nano-bioextractant (1)
- Nanocrystal growth (1)
- Nanofiber (1)
- Nanofibers (1)
- Nanofluidik (1)
- Nanohybrid (1)
- Nanokapseln (1)
- Nanokomposit (1)
- Nanolinsen (1)
- Nanoparticles, Adhesion, Interfaces, Bubble, Imaging (1)
- Nanopartikeln (1)
- Nanopartikeln-Anordnung (1)
- Nanoplastik (1)
- Nanoplättchen (1)
- Nanorods (1)
- Nanosensor (1)
- Nanospindeln (1)
- Nanostructured (1)
- Nanostruktur (1)
- Nanotoxicity (1)
- Nanotriangle stacking and welding (1)
- Nanotriangles (1)
- Naphthoquinone (1)
- Naphthoxazinoquinazolines (1)
- Naphthoxazinoquinazolinones (1)
- Naphthyridine receptor (1)
- Naphthyridines (1)
- Natrium-Ionen-Akkumulator (1)
- Natrium-Ionen-Batterie (1)
- Naturstoff (1)
- Nauclea diderrichii (1)
- Navicula perminuta (1)
- Near infra-red (1)
- Near infrared (1)
- Near infrared light triggered shape-recovery (1)
- Negative Poisson’s ratio (1)
- Negative control (1)
- Negatives Poisson-Verhältnis (1)
- Neodym-YAG-Laser (1)
- Neuroleptics (1)
- Neutron spin echo (1)
- Neutron spin-echo spectroscopy (1)
- Neutron tomography (1)
- Neutronen Diffraktion (1)
- Neutronen Reflektometrie (1)
- Ni nanodots (1)
- Ni2F5 (1)
- NiTi (1)
- Nichtlineare Spektroskopie (1)
- Nichtwässrige Synthese (1)
- Nickel (1)
- Nickel oxide (1)
- Nickel-Kohlenstoff-Katalysatoren (1)
- Nitrogen Physisorption (1)
- Nitroxides (1)
- Non-CYP enzymes (1)
- Non-adiabatic transitions (1)
- Non-destructive (1)
- Nonadiabatic effects (1)
- Nonenzymatic (1)
- Nontarget terrestrial plants (1)
- Novozym 435 (1)
- Nuclear magnetic resonance (1)
- Nuclear magnetic resonance (NMR) (1)
- Nuclear magnetic resonance spectroscopy (1)
- Nuclear-Spin-Statistics (1)
- Nucleophilic addition (1)
- Nucleotide nanosensor (1)
- Nukleation (1)
- Nukleierung (1)
- Numerical propagation (1)
- O-methyltransferase (1)
- OER (1)
- OH suppression (1)
- OLED (1)
- ORMOCER (R) (1)
- ORR (1)
- Oberflächen (1)
- Oberflächenkräfte (1)
- Oberflächenmodifikation (1)
- Oberflächenmodifizierung (1)
- Oberflächenpotential (1)
- Oberflächentopografie (1)
- Oberfächen (1)
- Occupation quotient pi*/pi (1)
- Olefin Metathese (1)
- Olefin isomerization (1)
- Olefin metathesis (1)
- Olefin self- and cross-metathesis (1)
- Oligo(ethylene glycol) (1)
- Oligo(omega-pentadecalactone) (1)
- Oligodepsipeptide (1)
- Oligoglycerols (1)
- Oligomere (1)
- Oligomers (1)
- On-demand Freisetzung (1)
- On.Line Monitoring (1)
- One-cycle laser pulses (1)
- Open Source (1)
- Open quantum systems (1)
- Optical fiber (1)
- Optical oxygen sensor (1)
- Optical parameter set (1)
- Optical sensor (1)
- Optimale Kontrolltheorie (1)
- Optode (1)
- Ordering transitions (1)
- Organic electrode (1)
- Organic photovoltaic Cell (1)
- Organic structure (1)
- Organische Photovoltaikzelle (1)
- Organo-Silikate (1)
- Organocatalytic polymerization (1)
- Organogel (1)
- Organosilica (1)
- Ormocarpum kirkii (1)
- Orthoptera (1)
- Oscillating Bubble (1)
- Oxalat-Fällung (1)
- Oxidkeramik (1)
- Oxo-Kohlenstoff (1)
- Oxygen sensing (1)
- PAH (1)
- PARAFAC (1)
- PCM (1)
- PDLLGA (1)
- PDMS surface grafting (1)
- PEG brushes (1)
- PEG-Funktionalisierung (1)
- PEG6000 (1)
- PHA-depolymerases (1)
- PHEMA (1)
- PISA (1)
- PMS activation (1)
- POF; Reliabilität; Abbau; Chemilumineszenz (1)
- POF; reliability; degradation; chemiluminescence (1)
- PQQ-GDH (1)
- PQQ-dependent glucose dehydrogenase (1)
- PZT (1)
- Packaging (1)
- Palladium ion (1)
- Palladium-catalyzed cross-coupling of arenediazonium salts with organoindium or organobismuth reagents (1)
- Paratope (1)
- Partial least squares regression (PLSR) (1)
- Particle shape (1)
- Particle size (1)
- Pastillation (1)
- Patchy Partikel (1)
- Pd catalysis (1)
- Pear (1)
- Pendant drop tensiometry (1)
- Penicillium digitatum (1)
- Pentylsedinine (1)
- Peptid (1)
- Peptid-Polymer-Konjugate (1)
- Peptide coating (1)
- Peptiden (1)
- Percolation (1)
- Peripheral ring current (1)
- Perovskite (1)
- Perovskites (1)
- Perowskit (1)
- Perowskit Solarzellen (1)
- Perowskit Vorläuferstadien (1)
- Perowskit-Solarzellen (1)
- Perowskite (1)
- Perylen (1)
- Phagocytosis (1)
- Phantoms (1)
- Phasenübergang (1)
- Phasenübergänge (1)
- Phenols (1)
- Phenylacetylide (1)
- Phenylanthraquinone (1)
- Phosphate (1)
- Phosphate recovery (1)
- Phosphatidylcholine acyl-alkyl C 32:1 (1)
- Phospholipids (1)
- Phosphorescence lifetime (1)
- Photo-Dehydro-Diels-Alder reaction (1)
- Photochemische Reaktionen (1)
- Photodesorption (1)
- Photodynamics (1)
- Photoelektronenspektroskopie (1)
- Photoinduced optical anisotropy (1)
- Photoinitiierte Polymerisationen (1)
- Photon Density Wave Spectroscopy (1)
- Photon density waves (1)
- Photonendichtewellen (1)
- Photopolymer (1)
- Photopolymers (1)
- Photoresponsive polymers (1)
- Photovoltaics (1)
- Physical Crosslinking (1)
- Physical Network (1)
- Physical chemistry (1)
- Physikalische Vernetzung (1)
- Phytopathogens (1)
- Pi interactions (1)
- Pickering Emulsion (1)
- Pickering interfacial catalysis (1)
- Piperidine alkaloid (1)
- Plant Material (1)
- Plant community model (1)
- Plant reproduction (1)
- Plasmid DNA production (1)
- Platelet (1)
- Platycelphium voense (1)
- Platyisoflavanone (1)
- Pleistocene (1)
- Pleurotus ostreatus (1)
- Plume (1)
- Pluronics (1)
- Polar effect (1)
- Polar substituent constant (1)
- Polarization elements (1)
- Poly vinyl alcohol (1)
- Poly(2-oxazoline) (1)
- Poly(N-Isopropylacrylamid) (1)
- Poly(N-Isopropylmethacrylamid) (1)
- Poly(N-Vinylisobutyramid) (1)
- Poly(allyl alcohol)s (1)
- Poly(carbonate-urea-urethane)s (1)
- Poly(epsilon-caprolactone) networks (1)
- Poly(ether imide) (1)
- Poly(ionic liquid) (1)
- Poly(ionische Flüssigkeit) (1)
- Poly(lactic acid) (1)
- Poly(n-butyl acrylate) (1)
- Poly(trimethylsilylpropyne) matrix (1)
- Poly(ε-caprolacton) (1)
- Poly-alpha,beta-unsaturated aldehydes (1)
- Poly-epsilon-caprolactone (1)
- PolyNIPAM (1)
- Polyaromatic fragments (1)
- Polycyclic aromatic hydrocarbons (1)
- Polyeste r (1)
- Polyester (1)
- Polyesterurethane (1)
- Polyether (1)
- Polyether ether ketone (1)
- Polyethylene imine (1)
- Polyglycin (1)
- Polyimides (1)
- Polykondensation (1)
- Polylactid (1)
- Polylactide stereocomplex (1)
- Polymer Modification (1)
- Polymer architecture (1)
- Polymer capped gold nanoparticles (1)
- Polymer dispersions (1)
- Polymer functionalization (1)
- Polymer micronetwork colloids (1)
- Polymer network properties (1)
- Polymer networks (1)
- Polymer physics (1)
- Polymer-clay composite (1)
- Polymer-coating (1)
- Polymer-modified surfaces (1)
- Polymeric substrate (1)
- Polymerizable surfactant (1)
- Polymerization (1)
- Polymerized ionic liquids (1)
- Polymernetzwerk (1)
- Polymerphysik (1)
- Polymers on surfaces (1)
- Polymersynthese (1)
- Polymertenside (1)
- Polymilchsäure (1)
- Polyolefin (1)
- Polypeptide (1)
- Polypeptoid (1)
- Polypeptoide (1)
- Polypeptoids (1)
- Polyplexes (1)
- Polystyrene-divinylbenzene (1)
- Polysulfobetaine (1)
- Porosimetry (1)
- Porous (1)
- Porous poly(ether imide) microparticulate absorbers (1)
- Porous scaffold (1)
- Poröse Materialien (1)
- Poröser Kohlenstoff (1)
- Poröser Stoff (1)
- Porösität (1)
- Post-Modifikationen (1)
- Post-polymerization modification (1)
- Potato (1)
- Precipitation (1)
- Principal component analysis (PCA) (1)
- Process (1)
- Proline (1)
- Protein Microcapsules (1)
- Protein delivery (1)
- Protein structure (1)
- Protein voltammetry (1)
- Protein-NMR-Spektroskopie (1)
- Protein-Polymer Konjugaten (1)
- Protein-Polymer-Konjugat (1)
- Protein-polymer conjugate (1)
- Proteinadsorption (1)
- Proteincharakterisierung (1)
- Proteinmikrokapseln (1)
- Proteins (1)
- Protic 2-hydroxyethylammonium ionic liquids (1)
- Proton transfer reaction (1)
- Pseudomonas aeruginosa (1)
- Pterocarpan (1)
- Pulse duration (1)
- Pulsed interleaved excitation (1)
- Push-pull alkynes (1)
- Push-pull allenes (1)
- Puzzles (1)
- Pyrene (1)
- Pyrimidines (1)
- QD device (1)
- QD stability (1)
- QD-Gerät (1)
- QD-Stabilität (1)
- QM/MM Molekulardynamik (1)
- QM/MM stochastic dynamics (1)
- QuEChERS (1)
- Quadratsäure (1)
- Quality (1)
- Quantenchemie (1)
- Quantendynamik (1)
- Quantendynamische Simulationen (1)
- Quantification of contrast agent (1)
- Quantum Chemical Calculations (1)
- Quantum Dot (1)
- Quantum Dots (1)
- Quantum chemistry (1)
- Quantum mechanics (1)
- Quantumdots (1)
- Quartz Crystal (1)
- Quasi-aromaticity (1)
- Quinonoid structure (1)
- Quotient method (1)
- Química de Coloides (1)
- RA-intramolecular hydrogen bond (1)
- RAFT dispersion polymerization (1)
- RAFT, Polymerisation (1)
- RAFT-Polymerization (1)
- RAFT/MADIX Polymerisation (1)
- RAFT/MADIX polymerization (1)
- RGD peptides (1)
- RGD-peptide (1)
- ROP (1)
- Radiative transport (1)
- Radical polymerization (1)
- Radicals (1)
- Radikalreaktionen (1)
- Radiosensibilisator (1)
- Random copolymer (1)
- Rapeseed cake (1)
- Rapeseed oil (1)
- Rare-earth elements (1)
- Reaction mechanisms (1)
- Reaction monitoring (1)
- Reaction products (1)
- Reactive adsorption (1)
- Reactive foaming (1)
- Reagents (1)
- Reaktion (1)
- Reaktionsmechanismen (1)
- Reaktionsmechanismus (1)
- Rearrangement to trithiaazapentalene (1)
- Redox chemistry (1)
- Redox polymer (1)
- Redoxchemie (1)
- Reduced scattering coefficient (1)
- Reduction (1)
- Regioselectivity (1)
- Release (1)
- Release studies (1)
- Renewable Resources (1)
- Reproductive toxicity (1)
- Rerenzmaterial (1)
- Residual dipolar couplings (1)
- Resonante Energie Transfer (1)
- Resonanz-Raman-Spektroskopie (1)
- Respiration (1)
- Responsive polymers (1)
- Responsivity (1)
- Reverse microemulsions (1)
- Reversibility (1)
- Rheologie (1)
- Rhodamine 6G (1)
- Rhodium (1)
- Ring method (1)
- Ring tensiometry (1)
- Ring-current effect (1)
- Ringöffnungspolymerisation (1)
- Robotic synthesis (1)
- Robotics (1)
- Rod-like Polymers (1)
- Root zone processes (1)
- Rotational barriers (1)
- RuBisCO (1)
- Ruthenium complexes (1)
- Röntgenbeugung (1)
- Röntgenstrahlung (1)
- S li-gands (1)
- S ligands (1)
- SAM (1)
- SAW impedance sensor (1)
- SBFI (1)
- SDS (1)
- SDS inverse micelle (1)
- SEC-MALS (1)
- SLS (1)
- SOD (1)
- SQM FF (1)
- SQM-FF (1)
- SRG formation in polymer brushes (1)
- STM (1)
- STM-induced reactions (1)
- Saccharide Recognition (1)
- Salicylic acid (1)
- Salze (1)
- Salzschmelze (1)
- Satellite hybrid (1)
- Sauerstoff (1)
- Sauerstoff Reduktion (1)
- Sauerstoff-Reduktionsreaktion (1)
- Scaffold contraction (1)
- Scaffold degradation (1)
- Scaffold stiffness (1)
- Scanning probe microscopy (SPM) (1)
- Schaum (1)
- Schaumfilme (1)
- Schizozygane indoline alkaloid (1)
- Schizozygia coffaeoides (1)
- Schmelz (1)
- Schrodinger equation (1)
- Schwefel (1)
- Schwefelwirt (1)
- Schwingungsanregung (1)
- Schwingungsaufgelöste UV/VIS-Spektroskopie (1)
- Schwingungsspektroskopie (1)
- Science and Mathematics (1)
- Second-Year undergraduate (1)
- Seedpods (1)
- Sekundärstruktur (1)
- Selbstassemblierung (1)
- Selbstheilende Beschichtungen (1)
- Self Instruction (1)
- Semen parameters (1)
- Senecio roseiflorus (1)
- Sequence analysis (1)
- Sequence structure (1)
- Serum (1)
- Sex (1)
- Shadowgraphie (1)
- Shape memory (1)
- Si(111)-7x7 (1)
- Silacyclohexanes (1)
- Silaheterocyclohexanes (1)
- Silanes (1)
- Silbernanopartikel (1)
- Silica Determination (1)
- Silica sulfuric acid (1)
- Silicate (1)
- Siliciumdioxid (1)
- Silicon Content (1)
- Silika (1)
- Silika Partikel (1)
- Silver (1)
- Silver nanoparticles (1)
- Simulation of H-1 NMR spectra (1)
- Simulation of polymer XPS (1)
- Single molecule fluorescence (1)
- Single-molecule FRET (1)
- Small angle neutron scattering (1)
- Small-angle X-ray scattering (1)
- Small-angle neutron scattering (1)
- Sn(IV) alkoxide (1)
- SnAr reaction (1)
- Sodium transport (1)
- Sodium-ion batteries (1)
- Soft-Templaten (1)
- Soil (1)
- Solanum tuberosum (1)
- Solar cells (1)
- Solarzellen (1)
- Solid acid (1)
- Solid phase (1)
- Solid phase synthesis (1)
- Solid polymer electrolyte (1)
- Solubility (1)
- Solute transport (1)
- Solution phase synthesis (1)
- Solvent extraction (1)
- Solvent-free (1)
- Solvothermalsynthese (1)
- Sonication (1)
- Sophoronol-7-methyl ether (1)
- Spannungskonzentrationen (1)
- Spatial NICS (1)
- Spatially resolved spectroscopy (1)
- Spermidin (1)
- Spezies (1)
- Sphaeranthus bullatus (1)
- Spherical polyelectrolyte brushes (1)
- Spinning drop (1)
- Spiro compound (1)
- Spiro compounds (1)
- Spiropyrane (1)
- Sprengstoffe (1)
- Spritzgießen (1)
- Stability of LB Films (1)
- Stabilität von Emulsionen (1)
- Stabilität von Schäumen (1)
- Staphylococcus aureus (1)
- Stem (1)
- Stem bark (1)
- Stereocomplex (1)
- Stereokomplex (1)
- Stereokomplexierung (1)
- Steric effects (1)
- Steric hindrance (1)
- Steric substituent constant (1)
- Stickstoff Physisorption (1)
- Stickstoffdotiert (1)
- Stickstoff‑ und Kohlenstoffhaltige Materialien (1)
- Stimuli-Sensitivität (1)
- Stimuli-responsive polymers (1)
- Stoßquerschnitt (1)
- Stress concentration (1)
- Stripping (1)
- Strontium (1)
- Structural investigations (1)
- Structure (1)
- Structure Determination (1)
- Structure revision (1)
- Strukturaufklärung (1)
- Strukturbildung (1)
- Strömungschemie (1)
- Students (1)
- Styrene (1)
- Sub-zero temperature (Celsius) (1)
- Subambient pressure (1)
- Submicron particles (1)
- Substituent chemical shifts (1)
- Substituent effects (1)
- Substrat (1)
- Substrate effect (1)
- Sulfation (1)
- Sulfonated polyaniline (1)
- Sulfoxide (1)
- Supercapacitor (1)
- Superkondensator (1)
- Superkondensatoren (1)
- Superoxide (1)
- Superparamagnetic (1)
- Superparamagnetic magnetite (1)
- Supramolecular Interactions (1)
- Supramolecular ball structure (1)
- Supramolecular compounds (1)
- Supramolekular (1)
- Supramolekularen Wechselwirkungen (1)
- Surface Hopping Dynamik (1)
- Surface chemistry (1)
- Surface complexes (1)
- Surface enhanced Raman scattering (SERS) (1)
- Surface plasmon resonance (1)
- Surface properties (1)
- Surface reaction (1)
- Surface relief grating (1)
- Surface removal (1)
- Surface science (1)
- Surface-initiated atom-transfer radical (1)
- Sustainability (1)
- Sustainable (1)
- Suzuki coupling (1)
- Swelling behavior (1)
- Switchable Surfactants (1)
- Switchable wettability (1)
- Synchrotron radiation XPS (1)
- Syngas Hydrogenation (1)
- Syngashydrierung (1)
- Synthesemethoden (1)
- Synthetische Biologie (1)
- T1 mapping (1)
- TBTU (1)
- TCP (1)
- TG/DTA (1)
- THP-1 cells (1)
- TOF-SIMS (1)
- Tandem mass spectrometry (1)
- Tandemmassenspektrometrie (1)
- Tautomerism (1)
- Teilchenbildung (1)
- Telechel (1)
- Temperaturänderungen (1)
- Templat (1)
- Template phase (1)
- Template reaction (1)
- Templated self-assembly (1)
- Templatierung (1)
- Templating (1)
- Tensid (1)
- Tephrosia aequilata (1)
- Tephrosia elata (1)
- Tephrosia subtriflora (1)
- Tephrosia villosa (1)
- Terbium (1)
- Terpurinflavone (1)
- Testosterone (1)
- Tetraoxo[8]circulenes (1)
- Tetraphenylethene Bioassay Fluorescent dye (1)
- Tetrapyrroles (1)
- Theoretical chemistry (1)
- Thermal behavior (1)
- Thermal broadening effects (1)
- Thermo-responsive (1)
- Thermo-responsive polymer (1)
- Thermochemical properties (1)
- Thermodynamische Eigenschaft (1)
- Thermomechanical history (1)
- Thermoplastic elastomer (1)
- Thermosensitivity (1)
- Thiazol-Salze (1)
- Thienopyridine (1)
- Thioether ligands (1)
- Thiol-X (1)
- Thiol-ene (1)
- Thiol-ene addition (1)
- Thiol-ene click chemistry (1)
- Thiole (1)
- Thioredoxin (1)
- Thiouracil (1)
- Threshold (1)
- Through-space NMR (1)
- Through-space NMR shielding (TSNMRS) (1)
- Ti4O7 (1)
- TiO2 (1)
- TiO2 nanotubes (1)
- Time-resolved Immunoassay (1)
- Time-resolved crystallography (1)
- Time-resolved spectroscopy (1)
- Tin octanoate (1)
- Toonacilin (1)
- Toonapubesins F (1)
- Torque (1)
- Total synthesis (1)
- Toxicity (1)
- Trace elements (1)
- Transient (1)
- Transient absorption (1)
- Transition metals (1)
- Transitionmetals (1)
- Transmembrane protein (1)
- Triazin (1)
- Triblock Copolymers (1)
- Triblock-Copolymere (1)
- Trichloracetimidate (1)
- Trichloroacetimidates (1)
- Triiodide "network" (1)
- Triphilic block copolymers (1)
- Trithiapentalene (1)
- Tropfen (1)
- Tropfenoszillationen (1)
- Tropfenprofil-Analysen-Tensiometrie (1)
- Trough-space NMR shieldings (TSNMRS) (1)
- Tube-like template phase (1)
- Tuber (1)
- Tubular network structure (1)
- Turbid media (1)
- Turraea nilotica (1)
- Turraea robusta (1)
- Twisted double bonds (1)
- Two-dimensional separations (1)
- Type 2 Diabetes (1)
- UV-VIS Spectroscopy (1)
- UV-Vis-NIR (1)
- UV/VIS (1)
- UVB reduction (1)
- Ugi reaction (1)
- Ultra-low (1)
- Ultradünne Filme (1)
- Ulva linza (1)
- Umweltreaktion (1)
- Untreated agricultural wastes (1)
- Upconversion luminescence (1)
- Upgrade of Fructose (1)
- Uracil (1)
- Uranyl (1)
- Uremic toxins (1)
- VEGF (1)
- Vacuum drying (1)
- Valerolacton (1)
- Vanadium pentoxide (1)
- Verbindungen auf Eisenbasis (1)
- Verdunstung (1)
- Vernetzung (1)
- Vesicle (1)
- Vesicles (1)
- Vesikel Forschung/Vesikel Studien (1)
- Vibrational states (1)
- Vibrio cholerae (1)
- Vibronic spectrum (1)
- Vinylogous N-acyliminium ion (1)
- Violaxanthin (1)
- Vis spectroscopy (1)
- Wacker reaction (1)
- Wasser auf Aluminiumoxid (1)
- Wasser/Luft Grenzflächen (1)
- Wasser/Öl-Grenzfläche (1)
- Wassergehalt (1)
- Wasseroberfläche (1)
- Wasserspaltung (1)
- Water splitting (1)
- Water vapor (1)
- Wavelength modulation gas spectroscopy (1)
- Wavelength modulation spectroscopy (laser spectroscopy) (1)
- Web-Based Learning (1)
- Weitwinkelröntgenstreuung (1)
- Winsor phases (1)
- Winterschachtelhalm (1)
- Wirkung des Ionenstärken (1)
- Wirkung des pH-Werten (1)
- Wärmetransformationsanwendungen (1)
- X-ray absorption (1)
- X-ray analysis (1)
- X-ray crystallography (1)
- Xanthone (1)
- Xenobiotics (1)
- Y-aromaticity (1)
- Ylide (1)
- Yukawa model in the Mean Spherical Approximation (1)
- Zanthoxylum holstzianum (1)
- Zanthoxylum leprieurii (1)
- Zeitabhängige Dichtefunktionaltheorie (1)
- Zeitaufgelöste Lumineszenz (1)
- Zeitaufgelöster Immunoassay (1)
- Zell-Umwelt-Interaktionen (1)
- Zellulose (1)
- Zuckererkennung (1)
- Zwitterionic surfactant (1)
- [N]phenylene dyads (1)
- [N]phenylenes (1)
- a (1)
- abbaubares Polymer (1)
- absolute-configuration (1)
- absorption (1)
- acceptors (1)
- acetanilides (1)
- acid (1)
- acidic ionic liquids (1)
- acidity constants (1)
- acoustically levitated droplets (1)
- acrylic acid esters (1)
- actin cytoskeleton (1)
- actinide (1)
- actinide, organic ligand, sorption, cementitious material, concrete, luminescence (1)
- activated urethane (1)
- activation entropy (1)
- active scaffold (1)
- activity (1)
- actuator (1)
- acute pancreatitis (1)
- adamantane (1)
- addition-fragmentation chain-transfer polymerization (1)
- additive Fertigung (1)
- additive manufacturing (1)
- additives (1)
- adenoassociated virus (1)
- adhesive (1)
- adhesives (1)
- adsorbate vibrations (1)
- adsorption kinetics (1)
- aequichalcone A (1)
- aequichalcone B (1)
- aequichalcone C (1)
- aerogel (1)
- aggregation (1)
- air - water interface (1)
- air-water-interface (1)
- aktiviertes Urethan (1)
- akustisch schwebende Tropfen (1)
- alcohols (1)
- aldol reaction (1)
- algae cultivation (1)
- alignment (1)
- alignments (1)
- alkaloid (1)
- alkyl nitrates (1)
- alkynes (1)
- alkynol cycloisomerization (1)
- all-carbon composites (1)
- allyl alcohols (1)
- alpha,omega-Dienes (1)
- alumina (1)
- aluminum alloy (1)
- amide ligand (1)
- amides (1)
- amine (1)
- amino acid N-carboxyanhydride (NCA) (1)
- amino acids (1)
- ammonia (1)
- amorphes Calciumcarbonat (1)
- amphiphile Blockcopolymere (1)
- amphiphilic block copolymer (1)
- amphiphilic block copolymers (1)
- amphiphilic particles (1)
- amphiphilic polymer assembly (1)
- amphiphilic surface (1)
- analytical methods (1)
- analytical technology (1)
- analytical ultracentrifugation (1)
- anion substitution (1)
- anionic polymerization (1)
- anionic polymerizations (1)
- anisotropic colloids (1)
- anisotropic microgels (1)
- anisotropic structures (1)
- anode (1)
- anti-HIV (1)
- anti-fouling (1)
- anti-inflammatory therapy (1)
- anti-polyelectrolyte effect (1)
- antibodies (1)
- antibody staining (1)
- antifouling coatings (1)
- antileishmanial (1)
- antimalarial activity (1)
- antimicrobial (1)
- antimicrobial peptide (1)
- antimycobacterial activity (1)
- aqueous systems (1)
- arenediazonium salts (1)
- aridity (1)
- articulated rods (1)
- artificial cells (1)
- arylboronic acids (1)
- aryldiazonium salts (1)
- aspect-ratio (1)
- assembly capabilities (1)
- associating polymers (1)
- assoziative Photodesorption (1)
- astrophotonics (1)
- asymmetric (1)
- asymmetric catalysis (1)
- asymmetrisch (1)
- atmospheric effects (1)
- atom transfer radical polymerization (ATRP) (1)
- atomic force microscopy (AFM) (1)
- azides (1)
- azobenzene containing surfactants (1)
- azobenzene trimethylammonium bromide (1)
- bandgap (1)
- barrier to ring inversion (1)
- basement membrane (1)
- basis sets (1)
- beer (1)
- begrenzte Polymerisation (1)
- behavior (1)
- bending stiffness (1)
- benzenoid structures (1)
- benzoboroxole (1)
- benzofurans (1)
- benzophenanthridine alkaloid (1)
- beta-(acyloxy)alkylrear (1)
- beta-dihydroagarofuran-type sesquiterpene (1)
- beta-galactosidase (1)
- beta-lactoglobulin (1)
- bicontinuous phase (1)
- bilayer (1)
- bilayer system (1)
- bio-based (1)
- bio-inspired (1)
- bio-modification (1)
- bioactive (1)
- bioaktiv (1)
- bioanalysis (1)
- biochromophores (1)
- bioconjugate (1)
- biodiversity (1)
- bioelectrochemistry (1)
- biofunctionalization (1)
- biohybrid membrane materials (1)
- bioinspiration (1)
- bioinspired materials (1)
- bioinstructive implants (1)
- biological applications of polymers (1)
- biological membrane (1)
- biological membranes (1)
- biologische Membranen (1)
- biomass valorization (1)
- biomass-derived carbons (1)
- biomaterial-tissue interface (1)
- biomedical (1)
- biomimetic (chemical reaction) (1)
- biomimetics and semiconducting polymers (1)
- biophotonics (1)
- biopolymers (1)
- bioprinting (1)
- biorecognition reactions (1)
- biorelevant (1)
- biosensor (1)
- biphasic catalysis (1)
- bismuth (1)
- blend (1)
- block copolymer vesicles (1)
- block-copolymer (1)
- block-copolymers (1)
- blockcopolymer (1)
- blockcopolymere (1)
- blood tests (1)
- body temperature (1)
- borates (1)
- bound phenolic compounds (1)
- brewster angle microscopy (1)
- broad melting temperature range (1)
- brominated (1)
- brushes (1)
- brushite (1)
- bubble-bubble interaction (1)
- building-blocks (1)
- cGMP (1)
- cadmium (1)
- calcium carbonate biomineralization (1)
- cancer radiation therapy (1)
- capacity (1)
- capillary pressure tensiometry (1)
- capillary-active substrates (1)
- capsule morphology (1)
- carbene electron deficiency (1)
- carbene ligands (1)
- carbenes (1)
- carbohydrate derivatives (1)
- carbohydrate esters (1)
- carbohydrate recognition (1)
- carbohydrate-based oxepines (1)
- carbohydrate-protein interactions (1)
- carbon fibers (1)
- carbon material (1)
- carbon nanodots (1)
- carbon supports (1)
- carbonyl-compounds (1)
- carbothermal (1)
- carbothermisch (1)
- cardiovascular disease (1)
- cardiovascular implant (1)
- carotenoid (1)
- cascade reactions (1)
- catalyst functionalization (1)
- catalytic application (1)
- catalyzed cross metathesis (1)
- catalyzed redox isomerization (1)
- catanionic surfactant bilayer (1)
- catanionic surfactants (1)
- catechol (1)
- cation miscibility (1)
- cationic ring-opening polymerization (1)
- cationic surfactants (1)
- cations (1)
- cavitation-based mechanical force (1)
- cell agglutination (1)
- cell culture device (1)
- cell cycle inhibitors (1)
- cell-environment interactions (1)
- cell-material interaction (1)
- cells (1)
- cellular uptake (1)
- ceramics (1)
- cereals (1)
- ceria (1)
- cerium oxide (1)
- cesium cation (1)
- chain azobenzene polymers (1)
- chain mobility (1)
- chain-extended (1)
- chalcogenide (1)
- chalcogens (1)
- chalcone (1)
- chelates (1)
- chemical modification (1)
- chemical synthesis (1)
- chemical vapor deposition (1)
- chemical-synthesis (1)
- chemische Sensoren (1)
- chemodosimeter (1)
- chiral carbon (1)
- chiral nanoparticles (1)
- chiral sensing (1)
- chiral separation (1)
- chiral switches (1)
- chirale Erkennung (1)
- chirale Schalter (1)
- chirale Trennung (1)
- chirality (1)
- chlorophyll (1)
- cholesteric phase (1)
- cholesteric scaffolds (1)
- chromanes (1)
- chromatography (1)
- chromenes (1)
- chromophores (1)
- chronic kidney disease (CKD) (1)
- chronic pancreatitis (1)
- ciprofloxacin (1)
- cis (1)
- cis,cis-Tricyclo[5.3.0.0(2,6)]dec-3-enes (1)
- citrate displacement (1)
- citrazinic acid (1)
- classical dynamics (1)
- classification (1)
- clay (1)
- click triazoles (1)
- cluster (1)
- cluster models (1)
- co-nonsolvency (1)
- coalescence (1)
- cobalt (1)
- cobamides (1)
- coexisting phases (1)
- coffee phenolic compounds (1)
- coffee processing (1)
- cold (1)
- collagen (1)
- collagen-IV (1)
- colloid chemistry (1)
- colloidal aggregation (1)
- colloidal chemistry (1)
- colloidal quantum dot (1)
- colloidal quantum dots (1)
- colorimetric detection (1)
- column operation mode (1)
- comb poly(beta-myrcene)-graft-poly(l-lactide) copolymers (1)
- common species (1)
- complex (1)
- complex emulsion (1)
- composite (1)
- composite electrodes (1)
- computational chemistry (1)
- computer-based (1)
- conductive polymer (1)
- configuration interaction (1)
- configuration interactions (1)
- confined polymerization (1)
- confinement (1)
- confocal Raman microscopy (1)
- confocal raman microscopy (1)
- conformational equilibrium (1)
- conformational transitions (1)
- conformational-changes (1)
- conjugated microporous polymers (1)
- cononsolvency (1)
- continuous-flow (1)
- contrast agents (1)
- control body weight (1)
- controlled release (1)
- controlled-release (1)
- convenient synthesis (1)
- coordination bonds (1)
- coordination complexes (1)
- coordination polymer (1)
- copolymer networks (1)
- copper minerals (1)
- copper(II) halide salts (1)
- copper-catalyzed alkyne-azide cycloaddition (1)
- core excited states (1)
- core-shell (1)
- core-shell UCNP (1)
- core-shell materials (1)
- core-shell nanoparticles (1)
- core-shell structures (1)
- correlation function (1)
- coupled-cluster (1)
- covalent frameworks (1)
- covalent organic framework (1)
- covalent organic frameworks (1)
- critical micellation temperature (1)
- critical solution temperature (1)
- cryo-electron (1)
- crystal structure prediction (1)
- crystalline (1)
- crystallinity (1)
- crystallography (1)
- ct-DNA (1)
- cyano anchor group (1)
- cyclic imines (1)
- cyclic olefin copolymer (1)
- cyclic thermomechanical testing (1)
- cyclization (1)
- cyclodextrin (1)
- cyclooligomers (1)
- cyclopropanation (1)
- cytidine (1)
- cytochrome P450 (1)
- cytoplasm (1)
- cytosolic sodium (1)
- cytotoxic (1)
- data-storage (1)
- de novo synthesis (1)
- de-novo synthesis (1)
- deacetylation (1)
- decay dynamics (1)
- dedifferentiation (1)
- deep eutectic solvents (1)
- defect chemistry (1)
- degradable (1)
- degradable polyester (1)
- degradable polymer (1)
- degradable polymers (1)
- delivery (1)
- dendritic cells (1)
- density functional theory (DFT) (1)
- deoxyfructosazine (1)
- dependent scattering (1)
- derivatives (1)
- design of experiments (1)
- deuteration (1)
- di(ethylene glycol) methy ether methacrylate (1)
- diamondoid (1)
- diazonium salts (1)
- dibenzocyclooctane (1)
- dibenzoeilatin (1)
- dibenzylbutane (1)
- diblock copolymers (1)
- diels-alder reaction (1)
- differential scanning calorimetry (DSC) (1)
- diffractive elements (1)
- diffusion barrier (1)
- dihydro-beta-agarofuran (1)
- dihydrobenzofurans (1)
- dihydromyricetin (1)
- dihydromyricetin-3-O-beta-glucoside (1)
- dihydroxyacetone (1)
- dilute aqueous-solutions (1)
- dimensional stability (1)
- dimer (1)
- dipole approximation (1)
- direct bioelectrocatalysis (1)
- direct electron transfer (1)
- discotics (1)
- disinfection (1)
- disordered media (1)
- dispersion (1)
- dissipative dynamics (1)
- distance learning/self instruction (1)
- diversiform structures (1)
- docking (1)
- double hydrophilic block copolymers (1)
- double strand break (1)
- drop (1)
- drop and bubble coalescence (1)
- drop profile analysis tensiometry (1)
- drop-drop interaction (1)
- droplet-droplet interactions (1)
- drought (1)
- drought tolerance (1)
- drug carrier system (1)
- drug delivery (1)
- drug imprinting (1)
- drug sensors (1)
- dual non-covalent interactions (1)
- dual thermoresponsive (1)
- dual-frequency phase-modulation (1)
- dyes (1)
- dynamic NMR spectroscopy (1)
- dynamic interfacial tensions (1)
- dünne Filme (1)
- echinoderm skeleton (1)
- ecosystem function (1)
- effect of alkyl side chains (1)
- efficient (1)
- elastomers (1)
- electric fields (1)
- electrical resistivity tomography (1)
- electrically switchable gratings. (1)
- electrochemical sensors (1)
- electrochromism (1)
- electrode materials (1)
- electrodes (1)
- electrolyte sensitivity (1)
- electromagnetic field enhancement (1)
- electron correlation (1)
- electron microscopy (1)
- electron tomography (1)
- electron-spin resonance (1)
- electronic wavepackets (1)
- electrospray ionization (1)
- electrospray ionization mass spectrometry and modeling (1)
- electrostatic assembly (1)
- electrostatics (1)
- elegans (1)
- elektroaktive Polymere (1)
- elektronische Materialien (1)
- elimination (1)
- ellipsometric mapping (1)
- emperical potential structure refinement (1)
- emulsion inversion (1)
- emulsion microscopy (1)
- emulsions (1)
- enantiomers (1)
- enantioselectivity (1)
- encapsulation (1)
- end-groups (1)
- endo-Mode cyclization (1)
- endogenous sensor proteins (1)
- endosomal escape (1)
- endothelial basement membrane (1)
- endothelization (1)
- energy conversion (1)
- energy density (1)
- energy materials (1)
- energy storage mechanism (1)
- energy-transfer (1)
- engineering (1)
- ensamblaje de nanopartículas (1)
- environmental remediation (1)
- environmental response (1)
- enzymatic degradation (1)
- enzymatic esterification (1)
- enzymatic sensors (1)
- enzymatic-degradation (1)
- enzymatically active membrane (1)
- enzyme immobilization (1)
- enzyme inhibitors (1)
- enzyme-polymer conjugates (1)
- enzyme/polymer conjugate (1)
- enzymology (1)
- ephedrine/pseudoephedrine (1)
- epithelial ion transport (1)
- epoxidation (1)
- epsilon-caprolactone (1)
- equilibrium topology (1)
- escence correlation spectroscopy (1)
- escherichia-coli (1)
- esters (1)
- estructuras templadas blandas (1)
- etanercept (1)
- ethanolamine phosphate (1)
- ether methacrylates (1)
- ethers (1)
- europium complex (1)
- evaporation (1)
- evolution (1)
- exchange (1)
- excimer UV light (1)
- exciton (1)
- exo-methylene conformational effect at cyclohexane (1)
- expandierbar (1)
- expansion (1)
- extracellular matrix modifying enzymes (1)
- extracellular matrix proteins (1)
- extraction (1)
- fatty acids (1)
- fermentation (1)
- ferrocene (1)
- ferroelectricity (1)
- ferrofluid (1)
- ferromagnetic (1)
- fiber (1)
- fiber meshes (1)
- fiber optic sensors (1)
- fiber sensors (1)
- fiber spectroscopy (1)
- fiber-optical spectroscopy (1)
- fibre Bragg gratings (1)
- fibrinogen (1)
- fibroblast (1)
- field test (1)
- film tuning (1)
- fine-structure (1)
- first-year undergraduate/general (1)
- flavanonol (1)
- flavonoid (1)
- flavonoids (1)
- flavonol (1)
- flexibility (1)
- flow chemistry (1)
- flow photochemistry (1)
- fludarabine (1)
- fluorescence anisotropy (1)
- fluorescence enhancement (1)
- fluorescence immunoassay (1)
- fluorescence label (1)
- fluorescence quenching (1)
- fluorescence stimuli‐ responsivity (1)
- fluorinated Blockcopolymers (1)
- fluorinated olefins (1)
- fluorinated polymers (1)
- fluorocarbon polymers (1)
- fluoroimmunoassay (1)
- fluoropolymers (1)
- fluorous chemistry (1)
- flux de Marangoni (1)
- foam analysis (1)
- foam films (1)
- focal adhesion (1)
- food contact material (1)
- force sensors (1)
- form stability (1)
- formal synthesis (1)
- formose (1)
- fouling release (1)
- fourier-transform spectroscopy (1)
- fractal kinetics (1)
- fractional dynamics (1)
- fulgides (1)
- fumaronitrile (1)
- function (1)
- functionalization of polymers (1)
- functionalized (1)
- functionalizing proteins (1)
- fungus (1)
- funktional (1)
- funktionalisiert (1)
- gadolinium (1)
- galactose-decorated monomer (1)
- galactosylceramide (1)
- galectin (1)
- galectin-3 (1)
- gas sorption (1)
- gas supply conditions (1)
- gas-phase reactions (1)
- gases (1)
- gelatin-based hydrogels (1)
- gelatin/chitosan hydrogel scaffold (1)
- gelation (1)
- gemini surfactant (1)
- gene silencing (1)
- generation of higher and lower harmonics (1)
- geometry (1)
- gepulster DPSS Laser (1)
- glass (1)
- glass transition (1)
- glass transition temperature (1)
- glass-transition temperature (1)
- glucose homeostasis (1)
- glucosinolates (1)
- glycals (1)
- glyco chemistry (1)
- glyco-inside nano-assemblies (1)
- glycoconjugate (1)
- glycoconjugates (1)
- glycogels (1)
- glycomaterials (1)
- glycomonomer (1)
- glycopeptide (1)
- glycopeptoid (1)
- glycopolymer (1)
- glycopolymer electrolytes (1)
- glycosynthases (1)
- gold electrodes (1)
- gold surface (1)
- gold-carbon catalysts (1)
- gold-polymer hybrid shell (1)
- gouttes (1)
- gouttes sessiles (1)
- graphene oxide (1)
- grazing incidence X-ray diffraction (1)
- groove binding (1)
- habitat (1)
- halide perovskite (1)
- halide-ions (1)
- hazelnut cultivars (1)
- head-to-tail surfactant associates (1)
- heat measurement (1)
- heat transformation application (1)
- heiße Elektronen (1)
- helicene (1)
- helicenes (1)
- hemibond (1)
- hemodialysis (1)
- hepcidin (1)
- heptazine (1)
- heteroatom (1)
- heteroatom modification (1)
- heteroatom-dotierte Kohlenstoffe (1)
- heterocyclic ligand (1)
- hexafluoropropene (1)
- hierarchical pore structure (1)
- hierarchical self-assembly (1)
- hierarchical structuring (1)
- hierarchically porous carbon (1)
- hierarchische Porenstruktur (1)
- high concentrations (1)
- high energy density (1)
- high harmonic generation (1)
- high pressure (1)
- high quantum yield (1)
- high-throughput screening (1)
- hohe Energiedichte (1)
- hohe Quantenausbeute (1)
- hole array (1)
- hole scavengers (1)
- hollow microfibers (1)
- hollow nanospheres (1)
- hollow-core photonic bandgap fiber (1)
- holmium(III) (1)
- holographic diffraction gratings (1)
- holography (1)
- holstzianoquinoline; (1)
- homogeneous catalysis (1)
- hot electrons (1)
- hot-electrons (1)
- human induced pluripotent stem cells (1)
- human keratinocytes (1)
- human monocytic (THP-1) cells (1)
- humane Keratinozyten (1)
- humaninduzierte pluripotente Stammzellen (1)
- humic acid (1)
- hyaluronic acid (1)
- hybrid (1)
- hybrid nanomaterials (1)
- hybrid nanostructures (1)
- hybrid perovskite (1)
- hybride Nanostrukturen (1)
- hydrate formation (1)
- hydrate formation process (1)
- hydraulic oils (1)
- hydrogen bonding (1)
- hydrogen isotopes (1)
- hydrogen storage (1)
- hydrogen-2 (1)
- hydrolases (1)
- hydrophil (1)
- hydrophilic (1)
- hydrophilic-to-lipophilic balance (1)
- hydrophobe Moleküle (1)
- hydrophobic mismatch (1)
- hydrophobic molecules (1)
- hydrophobic uremic toxins (1)
- hydrophobicity (1)
- hydrothermal carbon (1)
- hydrothermal carbonization (1)
- hydrothermale Carbonisierung (1)
- hydrotropes (1)
- hydroxy (1)
- hydroxyapatite (1)
- hydroxycinnamic acids (1)
- hydroxyl radical (1)
- hydroyxapatite (1)
- hypothalamus (1)
- hysteresis (1)
- identity hypothesis (1)
- imaging (1)
- imidazole (1)
- imidazolium salts (1)
- imines (1)
- immobilization (1)
- immunosensors (1)
- impedance spectroscopy (1)
- implants (1)
- implementation (1)
- in (1)
- in situ (1)
- in situ fluorescence microscopy (1)
- in vitro (1)
- in vitro thrombogenicity testing (1)
- in-operando SAXS (1)
- inclusion complex (1)
- incomplete surface passivation (1)
- indium (1)
- indole alkaloids (1)
- induced pluripotent stem cells (1)
- infrared: general (1)
- inhibition AChE (1)
- inhomogeneous-media (1)
- injection molding (1)
- inner surface (1)
- inorganic (1)
- inorganic chemistry (1)
- instrumentation: miscellaneous (1)
- interaction potential (1)
- intercalations (1)
- intercomparison (1)
- interfacial dynamics (1)
- interfacial forces (1)
- interfacial recombination (1)
- intermediates (1)
- intermolecular interactions (1)
- internal membrane-membrane adhesion (1)
- interne Membran-Membran Adhäsion (1)
- intracellular pH indicator (1)
- intramolecular charge-transfer (1)
- intrinsic microporosity (1)
- inverse (1)
- inverse Opale (1)
- inverse opal (1)
- inverse opals (1)
- ion beam (1)
- ion migration (1)
- ion mobility calculations (1)
- ion selective electrode (1)
- ion transport (1)
- ionenselektive Elektrode (1)
- ionic defects (1)
- ionic polymers (1)
- ionic strength (1)
- ionic strength effect (1)
- ionische Flüssigkeit (1)
- ionischen Polymere (1)
- ionisierende Strahlung (1)
- ionization (1)
- ionization energy (1)
- ionization potential (1)
- ionizing radiation (1)
- ionothermale Synthese (1)
- ions (1)
- iron-based compounds (1)
- iron-carbon nanotube catalysts (1)
- isoflavonoids (1)
- isomer resolution (1)
- isomerisation (1)
- isomerism (1)
- isoprene (1)
- isotope (1)
- isotope ecology (1)
- isotope effect (1)
- isotope effects (1)
- isotope ratios (1)
- isotope separation (1)
- janus emulsion (1)
- janus emulsions (1)
- joziknipholones (1)
- juvenile hormone biosynthesis (1)
- keratin (1)
- kinetic models (1)
- kinetic of cis-trans isomerization (1)
- kinetic water transfer (1)
- kinetics (polym (1)
- kinetics (polym) (1)
- kinetics (polym.) (1)
- klassische Diffusionstheorie (1)
- klebend (1)
- kolloidaler Quantenpunkt (1)
- kolloidchemie (1)
- komplexe Emulsion (1)
- kontrollierte radikalische Polymerisation (1)
- kovalente Rahmenbedingungen (1)
- künstliche Zellen (1)
- l-cysteine (1)
- labels (1)
- labile peroxides (1)
- lactate (1)
- land use (1)
- langmuir monolayer (1)
- lanthanide (1)
- lanthanide ions (1)
- lanthanide luminescence (1)
- lanthanoid migration (1)
- laser chemistry (1)
- laser induced (1)
- laser pulse control (1)
- laser pulses (1)
- laser resonators (1)
- laser-enhanced nuclear fusion (1)
- laser-induced breakdown spectroscopy (LIBS) (1)
- laser-induced incandescence (LII) (1)
- layer-by-layer (1)
- layer-by-layer glycopolymer coating (1)
- layer-by-layer self-assembly (1)
- layer-by-layer stacking (1)
- layered compounds (1)
- leaf wax (1)
- learning (1)
- lectin (1)
- leguminosae (1)
- levoglucosenol (1)
- levulinic acid (1)
- libraries (1)
- library (1)
- liegende Tropfen (1)
- life cycle assessment (1)
- life sciences (1)
- light scattering (1)
- lignans (1)
- lignin (1)
- linear assemblies (1)
- lipase release (1)
- lipases (1)
- lipid (1)
- lipid monolayer (1)
- lipidomics (1)
- lipids (1)
- liquid crystal (1)
- liquid crystal polymer (1)
- liquid crystalline polymer (1)
- liquid crystals (1)
- liquid-crystal precursors (1)
- liquid-crystalline polymers (1)
- lithiophilicity (1)
- lithium ion capacitors (1)
- lithium sulfides (1)
- lithium-ion batteries (1)
- lithium-sulfur batteries (1)
- living radical polymerization (LRP) (1)
- low temperature NMR spectroscopy (1)
- low-energy electron (1)
- low-temperature experiments (1)
- lower (1)
- lubricants (1)
- lupin (1)
- lösungsmittelfreie Synthese (1)
- mAb (1)
- machine learning (1)
- macroITO (1)
- macrocyclic compounds (1)
- macrosurfactants (1)
- magnesium (1)
- magnetic (1)
- magnetic-properties (1)
- magnetite (1)
- magnetosensitivity (1)
- magnetosome (1)
- magnetotactic bacteria (1)
- magnetotaktische Bakterien (1)
- maleonitrile (1)
- maltose-modified poly(ethyleneimine) (1)
- maltosylated poly(ethyleneimine) (1)
- manganese monoxide (1)
- marine biofouling (1)
- marker compound (1)
- mass (1)
- material characterization (1)
- material science (1)
- mechanical (1)
- mechanical properties (1)
- mechanical property (1)
- mechanical-properties (1)
- mechanism (1)
- medicinal mushrooms (1)
- mehrschichtige Verbindungen (1)
- melt (1)
- melt-recrystallization (1)
- melting (1)
- membrane science (1)
- meso-tetrakisphenylporphyrins (1)
- mesocrystal (1)
- mesogen mesophases (1)
- mesoporous (1)
- mesoporous carbon (1)
- mesoporös (1)
- mesostructure (1)
- metabolite markers (1)
- metal alloys (1)
- metal carbides (1)
- metal ions (1)
- metal nanoparticles (1)
- metal nitride carbon composites (1)
- metal organic framework (1)
- metal-containing ionic (1)
- metal-containing ionic liquids; (1)
- metal-free crosslinking (1)
- metal-organic framework (1)
- metal-organic mesocrystals (1)
- metal-to-ligand charge transfer (1)
- metallo-supramolecular polymers (1)
- metallocarbohydrates (1)
- metallorganischen Gerüstverbindungen (1)
- metalorganic frameworks (1)
- methacrylate (1)
- methacrylates (1)
- methane hydrate (1)
- method development (1)
- methyl cellulose (1)
- miRNA inhibitors (1)
- miRNA seed region (1)
- miRNA-Argonaute 2 protein complex (1)
- micellization (1)
- micro (1)
- micro/mesoporous (1)
- microRNA (1)
- microbalance (1)
- microbial activity (1)
- microcapsules (1)
- microchip (1)
- microemulsiones (1)
- microfluidic (1)
- microgel (1)
- microgel array (1)
- microgel arrays (1)
- microgel chains (1)
- microgel strands (1)
- microgreen (1)
- microporous (1)
- microporous polymers (1)
- microscale (1)
- microsensors (1)
- microtomography (1)
- microwave (1)
- microwave chemistry (1)
- mikroporöse Polymere (1)
- mikrowellengestützte Synthese (1)
- mild reaction conditions (1)
- mimics (1)
- mineralization beneath (1)
- miscibility (1)
- miscibility gap (1)
- mitochondria (1)
- mitsunobu (1)
- mixed gas hydrates (1)
- mixed quantum-classical methodology (1)
- mixed-matrix membranes (1)
- modelling (1)
- modified mycotoxins (1)
- modulation (1)
- modulus (1)
- moisture content (1)
- mold (1)
- mold fungi (1)
- molecular dynamics simulations (1)
- molecular imprinted polymers (1)
- molecular modeling (1)
- molecular simulations (1)
- molecular structure (1)
- molecular weight (1)
- molecular-dynamics (1)
- molecular-reorientation (1)
- molecular-structure (1)
- monolayer (1)
- monolith (1)
- morphological transformation (1)
- motif périodique (1)
- mu CT imaging (1)
- multi-compartmentalised vesicles (1)
- multi-kompartmentalisierte Vesikel (1)
- multi-mycotoxin analysis (1)
- multiblock copolymers (1)
- multicompartment micelle (1)
- multidrug-resistant Escherichia coli (1)
- multifunctional polymers (1)
- multilayer film (1)
- multiphoton processes (1)
- multiple emulsion preparation (1)
- multiple functions (1)
- multiresponsiv (1)
- multiresponsive (1)
- multitrophic (1)
- multivalency (1)
- multivalent ions (1)
- multiwavelength (1)
- mussel byssus (1)
- mussel-mimicking (1)
- mutants (1)
- myrcen (1)
- n-alkanes (1)
- n-heterocyclic carbenes (1)
- n-isopropylacrylamide (1)
- nAChR (1)
- nachhaltige Energiespeichermaterialien (1)
- nachwachsende Rohstoffe (1)
- nano (1)
- nano clay (1)
- nanoarray (1)
- nanobioconjugate (1)
- nanocapsules (1)
- nanocarriers (1)
- nanocomposite material (1)
- nanoestructuras (1)
- nanoestructuras híbridas (1)
- nanofillers (1)
- nanofluidics (1)
- nanohole arrays (1)
- nanoimprint (1)
- nanomedicine (1)
- nanoparticle assembly (1)
- nanoparticle characterization (1)
- nanopartículas (1)
- nanoplastic (1)
- nanoporous carbon particles (1)
- nanoporöser Kohlenstoffpartikel (1)
- nanoprisms (1)
- nanorods (1)
- nanoscale (1)
- nanosensors (1)
- nanosilver (1)
- nanospindles (1)
- nanostructure (1)
- nanostructured composite (1)
- nanotechnology (1)
- nanowires (1)
- naphthalene (1)
- natural-products (1)
- near edge X-ray absorption fine structure (1)
- near-infrared absorption (1)
- nematic phase (1)
- neolignans (1)
- nerve agents (1)
- networks (1)
- neuroleptics (1)
- neurons (1)
- neuropeptides (1)
- neutron (1)
- neutron diffraction (1)
- neutron powder diffraction (1)
- neutron reflectometry (1)
- nhc (1)
- nichtlineare Mechanik (1)
- nichtwässrige Synthese (1)
- nickel(II) (1)
- nickel-carbon catalysts (1)
- niederenergetische Elektronen (1)
- nitriles (1)
- nitrogen containing carbonaceous materials (1)
- nitrogen doped carbons (1)
- nitrogen heterocycles (1)
- nitrogen-doped (1)
- nitrogen-doped carbon (1)
- non-linear mechanics (1)
- non-metal catalysis (1)
- non-noble metal catalysts (1)
- norcaesalpin D (1)
- norcobamide biosynthesis (1)
- nucleation polymerization (1)
- nucleus-independent chemical shift (1)
- nucleus-independent chemical shifts (NICS) (1)
- numerical simulation (1)
- nutrient composition (1)
- o bond formation (1)
- o-Phenylenediamine (1)
- o-quinone isomerase (1)
- oak tree (1)
- obere kritische Lösetemperatur (1)
- oberflächenverstärkte Raman-Streuung (1)
- off-specular scattering (1)
- olefin metathesis (1)
- olefin-metathesis (1)
- olefination (1)
- oligo(ethylene glycol) (1)
- oligo(ethylene glycol) methacrylate (1)
- oligo(ethylene glycol) methyl ether methacrylate (1)
- oligo(ethyleneglycol) (1)
- oligomeric (1)
- oligomeric polydimethylsiloxane (1)
- oligomers (1)
- oligosaccharides (1)
- oligospiroketals (1)
- on demand particle release (1)
- onformational analysis (1)
- ontogeny (1)
- opal (1)
- open source (1)
- open system density matrix theory (1)
- open-circuit voltage (1)
- optical (1)
- optical imaging (1)
- optical oil sensor (1)
- optical sensor (1)
- optical sensors (1)
- optical spectra (1)
- optode (1)
- ordering process (1)
- organic chenlistry (1)
- organic compounds (1)
- organic light-emitting diodes (1)
- organic-inorganic c (1)
- organic-inorganic composite material (1)
- organische Chemie (1)
- organocatalytic polymerization (1)
- organogel (1)
- organometallics (1)
- orientational memory (1)
- ortho-quinone methide (o-QMs) (1)
- orthophosphates (1)
- oscillating bubble (1)
- osteogenic differentiation (1)
- oxalic precipitation (1)
- oxides (1)
- oxocarbon (1)
- oxygen plasma (1)
- oxygen sensor (1)
- p-Hydroxycinnamic acids (1)
- p16 (1)
- p21 (1)
- pH effect (1)
- pH sensing (1)
- pH-Dependent Photoresponsivity (1)
- pH-sensitive liposome (1)
- palladium catalyst (1)
- palmitic acid (1)
- pancreatic neoplasms (1)
- para-Nitro-pyridine N-oxides (1)
- paramagnetic (1)
- paramagnetic-resonance (1)
- paramagnetisch (1)
- particle formation (1)
- particulate (1)
- pea (1)
- peptide (1)
- peptide biomarkers (1)
- peptide-polymer conjugate (1)
- peptide-templated materials (1)
- periodic pattern (1)
- periodisches Muster (1)
- perovskite (1)
- perovskite precursors (1)
- perylene (1)
- pesticides (1)
- phagocytosis (1)
- phase behavior (1)
- phase separation (1)
- phase transition (1)
- phase transitions (1)
- phenanthrenes (1)
- phenolic acid (1)
- phenolic compounds (1)
- phonons (1)
- phosphate (1)
- phosphide (1)
- phospholipids (1)
- phosphorescence quenching (1)
- photo ionization (1)
- photo-crosslinked (1)
- photo-iniferter reversible addition-fragmentation chain-transfer (1)
- photo-mediated polymerization (1)
- photobioreactor (1)
- photocatalysts (1)
- photocatalytic water splitting (1)
- photochemical reactions (1)
- photochemical synthesis (1)
- photocycloaddition (1)
- photodehydro-Diels-Alder reaction (1)
- photodynamic therapy (1)
- photoelectron spectroscopy (1)
- photoinduced electron transfer (1)
- photoinduced nonadiabatic dynamics (1)
- photoinduced radical polymerization (1)
- photolytic ablation (1)
- photonic crystal (1)
- photopolymerization (1)
- photoredox catalysis (1)
- photosensitive azobenzene containing surfactant (1)
- photosensitive polymer brushes (1)
- phototunable optical properties (1)
- photovoltaic materials (1)
- physical (1)
- physikalisch (1)
- physiolgischer pH (1)
- physiological pH (1)
- phytomedicine (1)
- pi interactions (1)
- pi-Electron delocalization (1)
- pi-Stacking (1)
- pi-pi stacking (1)
- plant science (1)
- plasmon spectroscopy (1)
- plasmon-driven catalysis (1)
- plasmonic (1)
- plasmonic chemistry (1)
- plasmonic nanohole arrays (1)
- plasmonic nanoparticles (1)
- plasmonische Chemie (1)
- platelet activation (1)
- platelet adhesion (1)
- platelet aging (1)
- platelet function (1)
- platelet rich plasma (1)
- platelet storage (1)
- platelet-rich plasma (1)
- platform chemicals (1)
- platinum (1)
- polarizable drift gases (1)
- polarization diffraction grating (1)
- polarization gratings (1)
- poly(2-ethyl-2oxazoline) (1)
- poly(2-oxazoline)s (1)
- poly(N-isopropyl methacrylamide) (1)
- poly(N-isopropylacrylamide) (1)
- poly(N-vinyl isobutyramide) (1)
- poly(acrylamide) hydrogels (1)
- poly(e-caprolactone) (1)
- poly(epsilon-caprolactone) methacrylate (1)
- poly(ester amide)s (1)
- poly(ether imide) (1)
- poly(ether imide) microparticles (1)
- poly(ethyleneimine) (1)
- poly(ionic liquid) nanoparticles (1)
- poly(ionic liquid)s (1)
- poly(ionische Flüssigkeiten) (1)
- poly(n-butyl acrylate) (1)
- poly(styrene-b-2-vinylpyridine) (PS-P2VP) (1)
- poly(tetrafluoroethylene) (1)
- poly(ε-caprolactone) (1)
- poly[(rac-lactide)-co-glycolide] (1)
- polyacrylamide (1)
- polyamides (1)
- polyamine (1)
- polyamines (1)
- polyammonium salt (1)
- polyampholytes (1)
- polycaprolactone (1)
- polycarboxylate (1)
- polycationic monolayer (1)
- polycondensation (1)
- polycycles (1)
- polydepsipeptide (1)
- polydimethylsiloxane (1)
- polydopamine (1)
- polyelectrolyte adsorption (1)
- polyelectrolyte brushes (1)
- polyelectrolyte inks (1)
- polyelectrolyte membranes (1)
- polyesterurethane (1)
- polyglycerol (1)
- polyglycine (1)
- polyhydroxyalkanoates (PHA) (1)
- polyimides (1)
- polymer actuators (1)
- polymer amphiphile (1)
- polymer coating (1)
- polymer crystallization (1)
- polymer fillers (1)
- polymer micelles (1)
- polymer modification (1)
- polymer network (1)
- polymer physics (1)
- polymer solutions (1)
- polymer surface (1)
- polymer synthesis (1)
- polymer-modification (1)
- polymer/LC composites (1)
- polymeric materials (1)
- polymerised ionic liquids (1)
- polymersome spreading (1)
- polymyrcene (1)
- polyolefin (1)
- polypeptoid (1)
- polypropylene (1)
- polypropylene yarns (1)
- polysaccharides (1)
- polysiloxane (1)
- polysiloxanes (1)
- polysoap (1)
- polystyrene (1)
- polystyrenes (1)
- polysulfides (1)
- polyvinyl acetate (1)
- population doubling time (1)
- pore templating (1)
- porous (1)
- porous carbon-based materials (1)
- porous carbons (1)
- porous particles (1)
- porous structure (1)
- porphyrazine (1)
- porphyrinoids (1)
- porphyrins (1)
- porös (1)
- poröse Kohlenstoffe (1)
- poröse Kohlenstoffmaterialien (1)
- poröse Struktur (1)
- porösen Materialien auf Kohlenstoffbasis (1)
- poröser Kohlenstoff (1)
- post-laser-field electronic oscillations (1)
- post-modification (1)
- potato (Solanum tuberosum) (1)
- powder diffraction (1)
- precatalysts (1)
- prediction models (1)
- prenylated flavanonol (1)
- pressure (1)
- printing (1)
- pristimerin (1)
- processing (1)
- programmable adhesion (1)
- programmable friction (1)
- propargyl (1)
- protecting groups (1)
- protein Langmuir layers (1)
- protein NMR spectroscopy (1)
- protein analysis (1)
- protein characterization (1)
- protein imprinting (1)
- protein interactions (1)
- protein modification (1)
- protein stabilized foams (1)
- protein-kinase inhibitors (1)
- protein-protein interactions (1)
- proton conductivity (1)
- proton hopping (1)
- protonation (1)
- précipitation (1)
- précipitation oxalique (1)
- pterocarpene (1)
- pulse laser initiated polymerization (1)
- pulsed DPSS laser (1)
- pump-probe (1)
- purines (1)
- pyrene excimer (1)
- pyrochlore (1)
- quantum control (1)
- quantum sieving (1)
- quartz crystal microbalance (1)
- quenching (1)
- quinoid structures (1)
- quinoline-2,4(1H,3H)-diones (1)
- quinone (1)
- quinone methide (1)
- radical addition fragmentation chain transfer (RAFT) (1)
- radical reactions (1)
- radiosensitizer (1)
- rangement (1)
- rare earths (1)
- rate constants (1)
- ratiometric sensing (1)
- ratiometric sensors (1)
- ray absorption-spectroscopy (1)
- reaction mechanism (1)
- reactions (1)
- reactive (1)
- reactive flux rate constants (1)
- reactive intermediates (1)
- reactive oxygen species (ROS) (1)
- reactive templating (1)
- reference (1)
- reflection grating (1)
- reflectivity (1)
- relaxation NMR spectroscopy (1)
- reliability (1)
- renewable (1)
- renewable resource (1)
- renewables (1)
- reorientation (1)
- reshaping abilities (1)
- resonance Raman (1)
- resonance Raman spectroscopy (1)
- resonance energy transfer (1)
- resonance energy-tansfer (1)
- responsive materials (1)
- responsive polymer (1)
- responsive systems (1)
- responsivity (1)
- restricted N-S rotation (1)
- retro reactions (1)
- retrochalcone (1)
- reversibility (1)
- reversible (1)
- reversible addition-fragmentation chain transfer (1)
- reversible and irreversible structuring of polymer brushes (1)
- reversible bidirectional shape-memory polymer (1)
- reversible chain extension (1)
- reversible shape-memory effect (1)
- rheology (1)
- rhodium(I)– phosphine (1)
- rhodium-phosphine coordination bonds (1)
- ring closing metathesis (1)
- ring opening polymerization (1)
- ring-closing metathesis (1)
- ring-closure (1)
- ring-opening (1)
- rising bubble (1)
- root mean square roughness (1)
- rotational diffusion (1)
- rubidium cation (1)
- rutaceae (1)
- ruthenium carbene (1)
- sacrificial bonds (1)
- salt melt (1)
- sandwich complexes (1)
- sandwich microcontact printing (1)
- scale-up (1)
- scanning tunneling microscopy (1)
- scatchard plot (1)
- scattering (1)
- schaltbare Materialien (1)
- schaltbare Polymere (1)
- schizophrenes Verhalten (1)
- schizophrenic behavior (1)
- seco-Anthraquinone (1)
- secondary structure (1)
- sediment (1)
- sel (1)
- selbstassemblierende Monolagen (1)
- selective drug release (1)
- selective light reflection (1)
- selective oxidations (1)
- selective syntheses (1)
- self-assembled micelles (1)
- self-healing coatings (1)
- self-healing materials (1)
- self-organisation (1)
- self-organization (1)
- semi-IPN hydrogels (1)
- semi-crystalline (1)
- semiconductor lasers (1)
- semiempirical calculations (1)
- semiempirical methods (1)
- senescence-associated (1)
- sensitizers (1)
- sequence structures (1)
- serine phosphate decarboxylase (1)
- sesquiterpene (1)
- sessile droplet (1)
- severe acute pancreatitis (1)
- shape analysis (1)
- shape change (1)
- shape shifting materials (1)
- shape-memory polymer actuators (1)
- shape-memory properties (1)
- shape-persistent macrocycles (1)
- shieldings (TSNMRS) (1)
- shuttled RAFT-polymerization (1)
- sichtbares Licht Photokatalyse (1)
- side reaction (1)
- side-chains functionalization (1)
- silacyclohexanes (1)
- silane chemistry (1)
- silapiperidines (1)
- silica particles (1)
- silk fibroin (1)
- silkworm silk (1)
- siloxanes (1)
- silver (1)
- silver nanowires (1)
- silver(1) complexes (1)
- sinefungin (1)
- single crystals (1)
- single particle analysis (1)
- single strand break (1)
- single-atom catalysis (1)
- single-cell (1)
- single-molecule detection (1)
- situ Raman spectroscopy (1)
- skeletal elements (1)
- skin equivalents (1)
- small-angle neutron scattering (1)
- small-angle scattering (1)
- sodium storage mechanism (1)
- sodium-ion (1)
- sodium-ion batteries (1)
- sodium-ion battery (1)
- sodium-ion capacitors (1)
- soft X-radiation (1)
- soft X-ray (1)
- soft and hard templating (1)
- soft matter micro- and nanowires (1)
- soft template (1)
- soft-templates (1)
- soil gas (1)
- sol-gel processes (1)
- solar (1)
- solar cells (1)
- solid electrolyte interphase (1)
- solid phase (1)
- solid-phase extraction (1)
- solid-state NMR (1)
- solid-state structure (1)
- solid-supported biomimetic membranes (1)
- solubilization (1)
- solution process (1)
- solvatochromic fluorophore (1)
- solvent (1)
- solvent influence (1)
- solvent resistance (1)
- solvent vapor annealing (1)
- solvent-free reactions (1)
- solvents (1)
- solvo-thermal annealing (1)
- solvothermal synthesis (1)
- spacer (1)
- spacer group (1)
- speciation (1)
- species (1)
- specific interactions (1)
- spectra (1)
- spectro-electrochemistry (1)
- spectrometry (1)
- sperical (1)
- spermidine (1)
- spezifische Wechselwirkungen (1)
- spherical polyelectrolyte (1)
- spherical polyelectrolyte brushes (1)
- spiro compounds (1)
- spirocycles (1)
- spiropyran copolymer (1)
- sponge (1)
- spray imaging (1)
- sputtering (1)
- square planar (1)
- squaric acid (1)
- stannous octoate (1)
- star-block copolymers (1)
- stark eutektisches Lösungsmittel (1)
- state (1)
- states (1)
- statistical copolymer (1)
- statistical copolymers (1)
- statistische Versuchsplanung (Design of Experiments) (1)
- steigende Blasen (1)
- stem cell adhesion (1)
- stepwise complexation (1)
- stereocomplexes (1)
- steric hindrance (1)
- stickstoffdotierte Kohlenstoffe (1)
- stimul-responsive (1)
- stimul-responsive emulsion (1)
- stimuli-response (1)
- stimuli-sensitive (1)
- stimuli-sensitive materials (1)
- stimuli-sensitivity (1)
- stochastic processes (1)
- storage capacity (1)
- storage proteins (1)
- strain field (1)
- streptavidin (1)
- strong field (1)
- strong polyelectrolyte brush (1)
- structural-characterization (1)
- styrenes (1)
- substituted stilbenes (1)
- substrate (1)
- subtriflavanonol (1)
- sugars (1)
- sulfides (1)
- sulfimides (1)
- sulfobetain (1)
- sulfobetaine (1)
- sulfones (1)
- sulfoxide (1)
- sulfoxides (1)
- sulfur heterocycles (1)
- sulfur host (1)
- sunscreen (1)
- super-intense laser pulses (1)
- supercritical CO(2) (1)
- supercritical carbon dioxide (1)
- supercritical carbon dioxide (scCO₂) (1)
- superheated water (1)
- superlattices (1)
- superparamagnetisch (1)
- supported catalyst (1)
- supramolecular (1)
- supramolecular interactions (1)
- supramolecular polymer network (1)
- supramolekulare Chemie (1)
- surface charge (1)
- surface coating (1)
- surface enhanced spectroscopy (1)
- surface hopping (1)
- surface hopping dynamics (1)
- surface interaction (1)
- surface patterning (1)
- surface rheology (1)
- surface science (1)
- surface topography (1)
- surface-enhanced Raman spectroscopy (1)
- surface-initiated photopolymerization (1)
- surface-plasmon resonance (1)
- surfaces and interfaces (1)
- surfactant (1)
- sustainable energy storage materials (1)
- switch (1)
- switchable block copolymer (1)
- switchable retarder (1)
- synthetic methods (1)
- synthetische Biologie (1)
- synthosomes (1)
- sättigbarer Absorber (1)
- tamplat unterstütze Anordnung von weichen Partikeln (1)
- tandem mass spectrometry (1)
- tandem sequence (1)
- tanning agents (1)
- telechelics (1)
- telomeric DNA (1)
- temperature effect (1)
- temperature phase (1)
- temperature sensor (1)
- temperature variations (1)
- temperature-memory effect (1)
- temperature-responsive (1)
- temperaturschaltbar (1)
- template (1)
- template assisted alignment of soft particles (1)
- tensioactivos (1)
- terminal alkynes (1)
- termination (1)
- tetrabutylammonium hydroxide (1)
- tetrachloridocuprate(II) (1)
- tetrachlorocuprate(II) salts (1)
- tetrahalido metallates (1)
- tetrahalidometallates (1)
- thermal isomerization (1)
- thermal isomerization of azobenzene (1)
- thermal processing of food (1)
- thermal transformation mechanism (1)
- thermal treatments (1)
- thermisch angeregte Isomerisierung von Azobenzolen (1)
- thermisch schaltbar (1)
- thermisch schaltbare Polymere (1)
- thermo-sensitivity (1)
- thermomechanical properties (1)
- thermometer (1)
- thermomorphism (1)
- thermoplastic elastomer (1)
- thermoplastic elastomer synthesis (1)
- thermoplastisches Elastomer (1)
- thermoresponsive substrates (1)
- thermoresponsive-nanogel (1)
- thermosensitive polymers (1)
- thiazolium (1)
- thin film (1)
- thin film crystallization (1)
- thin-films (1)
- thiol (1)
- thiol passivation (1)
- thiol-ene (1)
- thiol-ene reactions (1)
- thiols (1)
- thiophenes (1)
- three-dimensional depth profiling (1)
- thrombocyte adhesion (1)
- through space NMR shieldings (1)
- time-dependent Schrödinger equation (1)
- time-dependent density functional theory (1)
- time-resolved fluorescence (1)
- time-resolved fluorescence spectroscopy (1)
- time-resolved luminescence (1)
- time-resolved measurements (1)
- tin(II) 2-ethylhexanoate (1)
- tissue (1)
- titania (1)
- to-coil transition (1)
- tocopherols (1)
- tomato (1)
- tomography (1)
- topical (1)
- trafficking (1)
- trans-fagaramide (1)
- trans-stilbenes (1)
- transcript markers (1)
- transcription factor (1)
- transferhydrogenation (1)
- transformation (1)
- transient (1)
- transition density matrix (1)
- transition metal (1)
- transition metals (1)
- transition path sampling (1)
- transition-metal-complexes (1)
- transition-potential method (1)
- translational diffusion (1)
- transparent-leitendes Oxid (1)
- traveling wave ion mobility mass spectrometry (1)
- triazine (1)
- triblock copolymers (1)
- triple-shape effect (1)
- tropical infectious diseases (1)
- tropische Infektionskrankheiten (1)
- tuberculosis (1)
- tunable diode laser (TDL) (1)
- two dimensional network (1)
- two-dimensional phases (1)
- two-photon (1)
- two-photon absorption (1)
- tyrosinase; o-quinones (1)
- ultra-thin membrane (1)
- ultracentrifuge (1)
- ultradünne Membranen (1)
- ultrafast dynamics (1)
- ultrafast reactions (1)
- ultrasound (1)
- ultrathin film (1)
- underpotential deposition (1)
- undulated nanoplatelets (1)
- untere kritische Entmischungstemperatur (1)
- untere kritische Lösungstemperatur (1)
- upconverting nanoparticles (1)
- uranium (VI) (1)
- uranyl (1)
- uremia (1)
- vacuum-UV radiation (1)
- valerolactone (1)
- validation (1)
- van der Waals forces (1)
- vanillin (1)
- vascular graft (1)
- vascular grafts (1)
- vesicle studies (1)
- viability (1)
- vibrational control (1)
- vibrational excitation (1)
- vibrational spectroscopy (1)
- vibrationally resolved electronic spectroscopy (1)
- vinylidene fluoride (1)
- viologen (1)
- vis spectroscopy (1)
- viscosity (1)
- visible light (1)
- visible light photocatalysis (1)
- volatile organic compounds (1)
- wasser (1)
- water at alumina (1)
- water remediation (1)
- water splitting reaction (1)
- water vapor (1)
- water/decane contact angle (1)
- water/tetradecane interface (1)
- weakly coordinating ions (1)
- weiche Vorlage (1)
- weiche und harte Templatierung (1)
- weißer Kohlenstoff (1)
- wetting (1)
- whey proteins (1)
- white carbon (1)
- whole blood (1)
- wide angle x‐ ray scattering (1)
- wide-angle x-ray scattering (1)
- wood modification (1)
- wrinkles (1)
- wässrige Systeme (1)
- xanthenes (1)
- xanthophylls (1)
- yarns (1)
- ylides (1)
- yolk-shell (1)
- yolk-shell nanoparticles (1)
- ytterbium (1)
- zeolitic imidazolate frameworks (1)
- zirconia (1)
- zweifach schaltbare Blockcopolymere (1)
- zwitterionic (1)
- zymogen granule membrane glycoprotein GP2 (1)
- Übergangsmetall (1)
- Übergangsmetalle (1)
- Überstrukturierte Komposite (1)
- ß-Lactoglobulin (1)
- überkritisches Kohlendioxid (scCO₂) (1)
- β-Hydroxydihydrochalcone (1)
- β‐myrcene (1)
Institute
- Institut für Chemie (2857) (remove)
The catalytic activity of metal nanoparticles (NPs) supported on porous supports can be controlled by various factors, such as NPs size, shape, or dispersivity, as well as their interaction with the support or the properties of the support material itself. However, these intrinsic properties are not solely responsible for the catalytic behavior of the overall reaction system, as the local environment and surface coverage of the catalyst with reactants, products, intermediates and other invloved species often play a crucial role in catalytic processes as well. Their contribution can be particularly critical in liquid-phase reactions with gaseous reactants that often suffer from low solubiltiy. One example is (D)-glucose oxidation with molecular oxygen over gold nanoparticles supported on porous carbons. The possibility to promote oxygen delivery in such aqueous phase oxidation reactions via the immobilization of heterogenous catalysts onto the interface of perfluorocarbon emulsion droplets is reported here. Gold-on-carbon catalyst particles can stabilize perfluorocarbon droplets in the aqueous phase and the local concentration of the oxidant in the surroundings of the gold nanoparticles accelerates the rate-limiting step of the reaction. Consequently, the reaction rate of a system with the optimal volume fraction of fluorocarbon is higher than a reference emulsion system without fluorocarbon, and the effect is observed even without additional oxygen supply.
Advances in characteristics improvement of polymeric membranes/separators for zinc-air batteries
(2022)
Zinc-air batteries (ZABs) are gaining popularity for a wide range of applications due to their high energy density, excellent safety, and environmental friendliness. A membrane/separator is a critical component of ZABs, with substantial implications for battery performance and stability, particularly in the case of a battery in solid state format, which has captured increased attention in recent years. In this review, recent advances as well as insight into the architecture of polymeric membrane/separators for ZABs including porous polymer separators (PPSs), gel polymer electrolytes (GPEs), solid polymer electrolytes (SPEs) and anion exchange membranes (AEMs) are discussed. The paper puts forward strategies to enhance stability, ionic conductivity, ionic selectivity, electrolyte storage capacity and mechanical properties for each type of polymeric membrane. In addition, the remaining major obstacles as well as the most potential avenues for future research are examined in detail.
Mycotoxins and pesticides regularly co-occur in agricultural products worldwide. Thus, humans can be exposed to both toxic contaminants and pesticides simultaneously, and multi-methods assessing the occurrence of various food contaminants and residues in a single method are necessary. A two-dimensional high performance liquid chromatography tandem mass spectrometry method for the analysis of 40 (modified) mycotoxins, two plant growth regulators, two tropane alkaloids, and 334 pesticides in cereals was developed. After an acetonitrile/water/formic acid (79:20:1, v/v/v) multi-analyte extraction procedure, extracts were injected into the two-dimensional setup, and an online clean-up was performed. The method was validated according to Commission Decision (EC) no. 657/2002 and document N° SANTE/12682/2019. Good linearity (R2 > 0.96), recovery data between 70-120%, repeatability and reproducibility values < 20%, and expanded measurement uncertainties < 50% were obtained for a wide range of analytes, including very polar substances like deoxynivalenol-3-glucoside and methamidophos. However, results for fumonisins, zearalenone-14,16-disulfate, acid-labile pesticides, and carbamates were unsatisfying. Limits of quantification meeting maximum (residue) limits were achieved for most analytes. Matrix effects varied highly (−85 to +1574%) and were mainly observed for analytes eluting in the first dimension and early-eluting analytes in the second dimension. The application of the method demonstrated the co-occurrence of different types of cereals with 28 toxins and pesticides. Overall, 86% of the samples showed positive findings with at least one mycotoxin, plant growth regulator, or pesticide.
The use of organic materials with reversible redox activity holds enormous potential for next-generation Li-ion energy storage devices. Yet, most candidates are not truly sustainable, i.e., not derived from renewable feedstock or made in benign reactions. Here an attempt is reported to resolve this issue by synthesizing an organic cathode material from tannic acid and microporous carbon derived from biomass. All constituents, including the redox-active material and conductive carbon additive, are made from renewable resources. Using a simple, sustainable fabrication method, a hybrid material is formed. The low cost and ecofriendly material shows outstanding performance with a capacity of 108 mAh g(-1) at 0.1 A g(-1) and low capacity fading, retaining approximately 80% of the maximum capacity after 90 cycles. With approximately 3.4 V versus Li+/Li, the cells also feature one of the highest reversible redox potentials reported for biomolecular cathodes. Finally, the quinone-catecholate redox mechanism responsible for the high capacity of tannic acid is confirmed by electrochemical characterization of a model compound similar to tannic acid but without catecholic groups.
Electrical actuation of coated and composite fibers based on poly[ethylene-co-(vinyl acetate)]
(2020)
Robots are typically controlled by electrical signals. Resistive heating is an option to electrically trigger actuation in thermosensitive polymer systems. In this study electrically triggerable poly[ethylene-co-(vinyl acetate)] (PEVA)-based fiber actuators are realized as composite fibers as well as polymer fibers with conductive coatings. In the coated fibers, the core consists of crosslinked PEVA (cPEVA), while the conductive coating shell is achieved via a dip coating procedure with a coating thickness between 10 and 140 mu m. The conductivity of coated fibers sigma = 300-550 S m(-1) is much higher than that of the composite fibers sigma = 5.5 S m(-1). A voltage (U) of 110 V is required to heat 30 cm of coated fiber to a targeted temperature of approximate to 65 degrees C for switching in less than a minute. Cyclic electrical actuation investigations reveal epsilon '(rev) = 5 +/- 1% reversible change in length for coated fibers. The fabrication of such electro-conductive polymeric actuators is suitable for upscaling so that their application potential as artificial muscles can be explored in future studies.
We present a comparative study of the gas-phase UV spectra of uracil and its thionated counterparts (2-thiouracil, 4-thiouracil and 2,4-dithiouracil), closely supported by time-dependent density functional theory calculations to assign the transitions observed. We systematically discuss pure gas-phase spectra for the (thio)uracils in the range of 200-400 nm (similar to 3.2-6.4 eV), and examine the spectra of all four species with a single theoretical approach. We note that specific vibrational modelling is needed to accurately determine the spectra across the examined wavelength range, and systematically model the transitions that appear at wavelengths shorter than 250 nm. Additionally, we find in the cases of 2-thiouracil and 2,4-dithiouracil, that the gas-phase spectra deviate significantly from some previously published solution-phase spectra, especially those collected in basic environments.
Polypropylene as one of the world's top commodity polymers is also widely used in the textile industry. However, its non-polar nature and partially crystalline structure significantly complicate the process of industrial coloring of polypropylene. Currently, textiles made of polypropylene or with a significant proportion of polypropylene are dyed under quite harsh conditions, including the use of high pressures and temperatures, which makes this process energy intensive. This research presents a three-step synthesis of coloring agents, capable of adhering onto synthetic polypropylene yarns without harsh energy-consuming conditions. This is possible by encapsulation of organic pigments using trimethoxyphenylsilane, introduction of surface double bonds via modification of the silica shell with trimethoxysilylpropylmethacrylate and final attachment of highly adhesive anchor peptides using thiol-ene chemistry. We demonstrate the applicability of this approach by dyeing polypropylene yarns in a simple process under ambient conditions after giving a step-by-step guide for the synthesis of these new dyeing agents. Finally, the successful dyeing of the yarns is visualized, and its practicability is discussed.
Polypropylene as one of the world's top commodity polymers is also widely used in the textile industry. However, its non-polar nature and partially crystalline structure significantly complicate the process of industrial coloring of polypropylene. Currently, textiles made of polypropylene or with a significant proportion of polypropylene are dyed under quite harsh conditions, including the use of high pressures and temperatures, which makes this process energy intensive. This research presents a three-step synthesis of coloring agents, capable of adhering onto synthetic polypropylene yarns without harsh energy-consuming conditions. This is possible by encapsulation of organic pigments using trimethoxyphenylsilane, introduction of surface double bonds via modification of the silica shell with trimethoxysilylpropylmethacrylate and final attachment of highly adhesive anchor peptides using thiol-ene chemistry. We demonstrate the applicability of this approach by dyeing polypropylene yarns in a simple process under ambient conditions after giving a step-by-step guide for the synthesis of these new dyeing agents. Finally, the successful dyeing of the yarns is visualized, and its practicability is discussed.
The replacement of oxygen by sulfur atoms of [1,3]-dioxolo[4.5-f]benzodioxole (DBD) fluorescent dyes is an efficient way to adjust the photophysical properties (sulfur tuning). While previously developed S-4-DBD dyes exhibit considerably red-shifted absorption and emission wavelength, the heavy atom effect of four sulfur atoms cause low fluorescence quantum yields and short fluorescence lifetimes. Herein, we demonstrate that the replacement of less than four sulfur atoms (S-1-DBD, 1,2-S-2-DBD, and 1,4-S-2-DBD dyes) permits a fine-tuning of the photophysical properties. In some cases, a similar influence on the wavelength without the detrimental effect on the quantum yields and lifetimes is observed. Furthermore, the synthetic accessibility of S-1- and S-2-DBD dyes is improved, compared with S-4-DBD dyes. For coupling with biomolecules a series of reactive derivatives of the new dyes were developed (azides, OSu esters, alkynes, maleimides).
Enzyme degradable polymersomes from chitosan-g-[poly-l-lysine-block-epsilon-caprolactone] copolymer
(2020)
The scope of this study includes the synthesis of chitosan-g-[peptide-poly-epsilon-caprolactone] and its self-assembly into polymeric vesicles employing the solvent shift method. In this way, well-defined core-shell structures suitable for encapsulation of drugs are generated. The hydrophobic polycaprolactone side-chain and the hydrophilic chitosan backbone are linked via an enzyme-cleavable peptide. The synthetic route involves the functionalization of chitosan with maleimide groups and the preparation of polycaprolactone with alkyne end-groups. A peptide functionalized with a thiol group on one side and an azide group on the other side is prepared. Thiol-ene click-chemistry and azide-alkyne Huisgen cycloaddition are then used to link the chitosan and poly-epsilon-caprolactone chains, respectively, with this peptide. For a preliminary study, poly-l-lysin is a readily available and cleavable peptide that is introduced to investigate the feasibility of the system. The size and shape of the polymersomes are studied by dynamic light scattering and cryo-scanning electron microscopy. Furthermore, degradability is studied by incubating the polymersomes with two enzymes, trypsin and chitosanase. A dispersion of polymersomes is used to coat titanium plates and to further test the stability against enzymatic degradation.
This opinion article describes recent approaches to use the "biorefinery" concept to lower the carbon footprint of typical mass polymers, by replacing parts of the fossil monomers with similar or even the same monomer made from regrowing dendritic biomass. Herein, the new and green catalytic synthetic routes are for lactic acid (LA), isosorbide (IS), 2,5-furandicarboxylic acid (FDCA), and p-xylene (pXL). Furthermore, the synthesis of two unconventional lignocellulosic biomass derivable monomers, i.e., alpha-methylene-gamma-valerolactone (MeGVL) and levoglucosenol (LG), are presented. All those have the potential to enter in a cost-effective way, also the mass market and thereby recover lost areas for polymer materials. The differences of catalytic unit operations of the biorefinery are also discussed and the challenges that must be addressed along the synthesis path of each monomers.
A method for the fabrication of well-defined metallic nanostructures is presented here in a simple and straightforward fashion. As an alternative to lithographic techniques, this routine employs microcontact printing utilizing wrinkled stamps, which are prepared from polydimethylsiloxane (PDMS), and includes the formation of hydrophobic stripe patterns on a substrate via the transfer of oligomeric PDMS. Subsequent backfilling of the interspaces between these stripes with a hydroxyl-functional poly(2-vinyl pyridine) then provides the basic pattern for the deposition of citrate-stabilized gold nanoparticles promoted by electrostatic interaction. The resulting metallic nanostripes can be further customized by peeling off particles in a second microcontact printing step, which employs poly(ethylene imine) surface-decorated wrinkled stamps, to form nanolattices. Due to the independent adjustability of the period dimensions of the wrinkled stamps and stamp orientation with respect to the substrate, particle arrays on the (sub)micro-scale with various kinds of geometries are accessible in a straightforward fashion. This work provides an alternative, cost-effective, and scalable surface-patterning technique to fabricate nanolattice structures applicable to multiple types of functional nanoparticles. Being a top-down method, this process could be readily implemented into, e.g., the fabrication of optical and sensing devices on a large scale.
Lithium-ion batteries have revolutionized battery technology. However, the scarcity of lithium in nature is driving the search for alternatives. For that reason, sodium-ion batteries have attracted increasing attention in recent years. The main obstacle to their development is the anode as, unlike for lithium-ion batteries, graphite cannot be used due to the inability to form stoichiometrically useful intercalation compounds with sodium. A promising candidate for sodium storage is hard carbon a form of nongraphitisable carbon, that can be synthesized from various precursor materials. Processing of hard carbons is often done by using mechanochemical treatments. Although it is generally accepted and often observed that they can influence the porosity of hard carbons, their effect on battery performance not well understood. Here, the changes in porosity occurring during ball milling are elucidated and related to the properties of hard carbons in sodium storage. Analysis by combined gas physisorption and small angle X-ray scattering shows that porosity changes during ball milling with a significant increase of the open porosity, unsuitable for reversible sodium storage, and decrease of the closed porosity, suitable for reversible sodium storage. While pristine hard carbon can store 58.5 mAh g(-1) in the closed pores, upon 5 h of mechanical treatment in a ball mill it can only store 35.5 mAh g(-1). The obtained results are furthermore pointing towards the disputed "intercalation-adsorption" mechanism.
Point-of-care and in-vivo bio-diagnostic tools are the current need for the present critical scenarios in the healthcare industry. The past few decades have seen a surge in research activities related to solving the challenges associated with precise on-site bio-sensing. Cutting-edge fiber optic technology enables the interaction of light with functionalized fiber surfaces at remote locations to develop a novel, miniaturized and cost-effective lab on fiber technology for bio-sensing applications. The recent remarkable developments in the field of nanotechnology provide innumerable functionalization methodologies to develop selective bio-recognition elements for label free biosensors. These exceptional methods may be easily integrated with fiber surfaces to provide highly selective light-matter interaction depending on various transduction mechanisms. In the present review, an overview of optical fiber-based biosensors has been provided with focus on physical principles used, along with the functionalization protocols for the detection of various biological analytes to diagnose the disease. The design and performance of these biosensors in terms of operating range, selectivity, response time and limit of detection have been discussed. In the concluding remarks, the challenges associated with these biosensors and the improvement required to develop handheld devices to enable direct target detection have been highlighted.
The CH2Cl2/MeOH (1:1) extract of Zanthoxylum holstzianum stem bark showed good antiplasmodial activity (IC50 2.5 +/- 0.3 and 2.6 +/- 0.3 mu g/mL against the W2 and D6 strains of Plasmodium falciparum, respectively). From the extract five benzophenanthridine alkaloids [8-acetonyldihydrochelerythrine (1), nitidine (2), dihydrochelerythine (3), norchelerythrine (5), arnottianamide (8)]; a 2-quinolone alkaloid [N-methylflindersine (4)]; a lignan [4,4 '-dihydroxy-3,3 '-dimethoxylignan-9,9 '-diyl diacetate (7)] and a dimer of a benzophenanthridine and 2-quinoline [holstzianoquinoline (6)] were isolated. The CH2Cl2/MeOH (1:1) extract of the root bark afforded 1, 3-6, 8, chelerythridimerine (9) and 9-demethyloxychelerythrine (10). Holstzianoquinoline (6) is new, and is the second dimer linked by a C-C bond of a benzophenanthridine and a 2-quinoline reported thus far. The compounds were identified based on spectroscopic evidence. Amongst five compounds (1-5) tested against two strains of P. falciparum, nitidine (IC50 0.11 +/- 0.01 mu g/mL against W2 and D6 strains) and norchelerythrine (IC50 value of 0.15 +/- 0.01 mu g/mL against D6 strain) were the most active.
The swelling and co-nonsolvency behaviors in pure H2O and in a mixed H2O/CH3OH vapor atmosphere of two different polar, water-soluble polymers in thin film geometry are studied in situ. Films of a zwitterionic poly(sulfobetaine), namely, poly[3-((2-(methacryloyloxy)ethyl)dimethylammonio) propane-1-sulfonate] (PSPE), and a polar nonionic polymer, namely, poly(N-isopropylmethacrylamide) (PNIPMAM), are investigated in real time by spectral reflectance (SR) measurements and Fourier transform infrared (FTIR) spectroscopy. Whereas PSPE is insoluble in methanol, PNIPMAM is soluble but exhibits cononsolvency behavior in water/methanol mixtures. First, the swelling of PSPE and PNIPMAM thin films in H2O vapor is followed. Subsequently, CH3OH is added to the vapor atmosphere, and its contracting effect on the water-swollen films is monitored, revealing a co-nonsolvency-type behavior for PNIPMAM and PSPE. SR measurements indicate that PSPE and PNIPMAM behave significantly different during the H2O swelling and subsequent exposure to CH3OH, not only with respect to the amounts of absorbed water and CH3OH, but also to the cosolvent-induced contraction mechanisms. While PSPE thin films exhibit an abrupt one-step contraction, the contraction of PNIPMAM thin films occurs in two steps. FTIR studies corroborate these findings on a molecular scale and reveal the role of the specific functional groups, both during the swelling and the cosolvent-induced switching of the solvation state.
We search for homovalent alternatives for A, B, and X-ions in ABX(3) type inorganic halide perovskites suitable for tandem solar cell applications. We replace the conventional A-site organic cation CH3NH3, by 3 inorganic cations, Cs, K, and Rb, and the B site consists of metals; Cd, Hg, Ge, Pb, and Sn This work is built on our previous high throughput screening of hybrid perovskite materials (Kar et al 2018 J. Chem. Phys. 149, 214701). By performing a systematic screening study using Density Functional Theory (DFT) methods, we found 11 suitable candidates; 2 Cs-based, 3 K-based and 6 Rb-based that are suitable for tandem solar cell applications.
Stem cells are capable of sensing and processing environmental inputs, converting this information to output a specific cell lineage through signaling cascades. Despite the combinatorial nature of mechanical, thermal, and biochemical signals, these stimuli have typically been decoupled and applied independently, requiring continuous regulation by controlling units. We employ a programmable polymer actuator sheet to autonomously synchronize thermal and mechanical signals applied to mesenchymal stem cells (MSC5). Using a grid on its underside, the shape change of polymer sheet, as well as cell morphology, calcium (Ca2+) influx, and focal adhesion assembly, could be visualized and quantified. This paper gives compelling evidence that the temperature sensing and mechanosensing of MSC5 are interconnected via intracellular Ca2+. Up-regulated Ca2+ levels lead to a remarkable alteration of histone H3K9 acetylation and activation of osteogenic related genes. The interplay of physical, thermal, and biochemical signaling was utilized to accelerate the cell differentiation toward osteogenic lineage. The approach of programmable bioinstructivity provides a fundamental principle for functional biomaterials exhibiting multifaceted stimuli on differentiation programs. Technological impact is expected in the tissue engineering of periosteum for treating bone defects.
Stem cells are capable of sensing and processing environmental inputs, converting this information to output a specific cell lineage through signaling cascades. Despite the combinatorial nature of mechanical, thermal, and biochemical signals, these stimuli have typically been decoupled and applied independently, requiring continuous regulation by controlling units. We employ a programmable polymer actuator sheet to autonomously synchronize thermal and mechanical signals applied to mesenchymal stem cells (MSC5). Using a grid on its underside, the shape change of polymer sheet, as well as cell morphology, calcium (Ca2+) influx, and focal adhesion assembly, could be visualized and quantified. This paper gives compelling evidence that the temperature sensing and mechanosensing of MSC5 are interconnected via intracellular Ca2+. Up-regulated Ca2+ levels lead to a remarkable alteration of histone H3K9 acetylation and activation of osteogenic related genes. The interplay of physical, thermal, and biochemical signaling was utilized to accelerate the cell differentiation toward osteogenic lineage. The approach of programmable bioinstructivity provides a fundamental principle for functional biomaterials exhibiting multifaceted stimuli on differentiation programs. Technological impact is expected in the tissue engineering of periosteum for treating bone defects.
The potential of using crystallinity as morphological parameter to control polyester degradation in acidic environments is explored in ultrathin films by Langmuir technique. Films of hydroxy or methacrylate end-capped oligo(epsilon-caprolactone) (OCL) are prepared at the air-water interface as a function of mean molecular area (MMA). The obtained amorphous, partially crystalline or highly crystalline ultrathin films of OCL are hydrolytically degraded at pH similar to 1.2 on water surface or on silicon surface as-transferred films. A high crystallinity reduces the hydrolytic degradation rate of the films on both water and solid surfaces. Different acceleration rates of hydrolytic degradation of semi-crystalline films are achieved either by crystals complete melting, partially melting, or by heating them below their melting temperatures. Semi-crystalline OCL films transferred via water onto a solid surface retain their crystalline morphology, degrade in a controlled manner, and are of interest as thermoswitchable coatings for cell substrates and medical devices.
The alpha-Al2O3(0001) surface has been extensively studied because of its significance in both fundamental research and application. Prior work suggests that in ultra-high-vacuum (UHV), in the absence of water, the so-called Al-I termination is thermodynamically favored, while in ambient, in contact with liquid water, a Gibbsite-like layer is created. While the view of the alpha- Al2O3(0001)/H2O(l) interface appears relatively clear in theory, experimental characterization of this system has resulted in estimates of surface acidity, i.e., isoelectric points, that differ by 4 pH units and surface structure that in some reports has non-hydrogen-bonded surface aluminol (Al-OH) groups and in others does not. In this study, we employed vibrational sum frequency spectroscopy (VSFS) and density functional theory (DFT) simulation to study the surface phonon modes of the differently terminated alpha-Al2O3(0001) surfaces in both UHV and ambient. We find that, on either water dosing of the Al-I in UHV or heat-induced dehydroxylation of the Gibbsite-like in ambient, the surfaces do not interconvert. This observation offers a new explanation for disagreements in prior work on the alpha-Al2O3(0001)/liquid water interface -different preparation methods may create surfaces that do not interconvert-and shows that the surface phonon spectral response offers a novel probe of interfacial hydrogen bonding structure.
The production and consumption of commodity polymers have been an indispensable part of the development of our modern society. Owing to their adjustable properties and variety of functions, polymer-based materials will continue playing important roles in achieving the Sustainable Development Goals (SDG)s, defined by the United Nations, in key areas such as healthcare, transport, food preservation, construction, electronics, and water management. Considering the serious environmental crisis, generated by increasing consumption of plastics, leading-edge polymers need to incorporate two types of functions: Those that directly arise from the demands of the application (e.g. selective gas and liquid permeation, actuation or charge transport) and those that enable minimization of environmental harm, e.g., through prolongation of the functional lifetime, minimization of material usage, or through predictable disintegration into non-toxic fragments. Here, we give examples of how the incorporation of a thoughtful combination of properties/functions can enhance the sustainability of plastics ranging from material design to waste management. We focus on tools to measure and reduce the negative impacts of plastics on the environment throughout their life cycle, the use of renewable sources for their synthesis, the design of biodegradable and/or recyclable materials, and the use of biotechnological strategies for enzymatic recycling of plastics that fits into a circular bioeconomy. Finally, we discuss future applications for sustainable plastics with the aim to achieve the SDGs through international cooperation. <br /> Leading-edge polymer-based materials for consumer and advanced applications are necessary to achieve sustainable development at a global scale. It is essential to understand how sustainability can be incorporated in these materials via green chemistry, the integration of bio-based building blocks from biorefineries, circular bioeconomy strategies, and combined smart and functional capabilities.
Identification of patterns in chemical reaction pathways aids in the effective design of molecules for specific applications. Here, we report on model reactions with a water-soluble single thiol-thioester exchange (TTE) reaction substrate, which was designed taking in view biological and medical applications. This substrate consists of the thio-depsipeptide, Ac-Pro-Leu-Gly-SLeu-Leu-Gly-NEtSH (TDP) and does not yield foul-smelling thiol exchange products when compared with aromatic thiol containing single TTE substrates. TDP generates an alpha,omega-dithiol crosslinker in situ in a 'pseudo intramolecular' TTE. Competitive intermolecular TTE of TDP with externally added "basic" thiols increased the crosslinker concentration whilst "acidic" thiols decreased its concentration. TDP could potentially enable in situ bioconjugation and crosslinking applications.
The low temperature (95 K) NMR study of 1-Ph-1-t-Bu-silacyclohexane (1) showed the conformational equilibrium to be extremely one-sided toward thePh(ax),t-Bueq conformer. The barrier to interconversion has been measured (4.2-4.6 kcal/mol) and the conformational equilibrium [Delta nu = 1990.64 ppm (Si-29), 618.9 ppm (C-13), 1-Ph-ax:1-Pheq = (95.6-96.6%):(3.4-4.4%), K = 25 +/- 3, Delta G degrees = -RT ln K = 0.58-0.63 kcal/mol] analyzed. The assignment and quantification of the NMR signals is supported by MP2 and DFT calculations.
The quest for "chemical accuracy" is becoming more and more demanded in the field of structure and kinetics of molecules at solid surfaces. In this paper, as an example, we focus on the barrier for hydrogen diffusion on a alpha-Al2O3 (0001) surface, aiming for a couple cluster singles, doubles, and perturbative triples [CCSD(T)]-level benchmark. We employ the density functional theory (DFT) optimized minimum and transition state structures reported by Heiden, Usvyat, and Saalfrank [J. Phys. Chem. C 123, 6675 (2019)]. The barrier is first evaluated at the periodic Hartree-Fock and local Moller-Plesset second-order perturbation (MP2) level of theory. The possible sources of errors are then analyzed, which includes basis set incompleteness error, frozen core, density fitting, local approximation errors, as well as the MP2 method error. Using periodic and embedded fragment models, corrections to these errors are evaluated. In particular, two corrections are found to be non-negligible (both from the chemical accuracy perspective and at the scale of the barrier value of 0.72 eV): the correction to the frozen core-approximation of 0.06 eV and the CCSD(T) correction of 0.07 eV. Our correlated wave function results are compared to barriers obtained from DFT. Among the tested DFT functionals, the best performing for this barrier is B3LYP-D3.
The remarkable antifouling properties of zwitterionic polymers in controlled environments are often counteracted by their delicate mechanical stability. In order to improve the mechanical stabilities of zwitterionic hydrogels, the effect of increased crosslinker densities was thus explored. In a first approach, terpolymers of zwitterionic monomer 3-[N -2(methacryloyloxy)ethyl-N,N-dimethyl]ammonio propane-1-sulfonate (SPE), hydrophobic monomer butyl methacrylate (BMA), and photo-crosslinker 2-(4-benzoylphenoxy)ethyl methacrylate (BPEMA) were synthesized. Thin hydrogel coatings of the copolymers were then produced and photo-crosslinked. Studies of the swollen hydrogel films showed that not only the mechanical stability but also, unexpectedly, the antifouling properties were improved by the presence of hydrophobic BMA units in the terpolymers.
Based on the positive results shown by the amphiphilic terpolymers and in order to further test the impact that hydrophobicity has on both the antifouling properties of zwitterionic hydrogels and on their mechanical stability, a new amphiphilic zwitterionic methacrylic monomer, 3-((2-(methacryloyloxy)hexyl)dimethylammonio)propane-1-sulfonate (M1), was synthesized in good yields in a multistep synthesis. Homopolymers of M1 were obtained by free-radical polymerization. Similarly, terpolymers of M1, zwitterionic monomer SPE, and photo-crosslinker BPEMA were synthesized by free-radical copolymerization and thoroughly characterized, including its solubilities in selected solvents.
Also, a new family of vinyl amide zwitterionic monomomers, namely 3-(dimethyl(2-(N -vinylacetamido)ethyl)ammonio)propane-1-sulfonate (M2), 4-(dimethyl(2-(N-vinylacetamido)ethyl)ammonio)butane-1-sulfonate (M3), and 3-(dimethyl(2-(N-vinylacetamido)ethyl)ammonio)propyl sulfate (M4), together with the new photo-crosslinker 4-benzoyl-N-vinylbenzamide (M5) that is well-suited for copolymerization with vinylamides, are introduced within the scope of the present work. The monomers are synthesized with good yields developing a multistep synthesis. Homopolymers of the new vinyl amide zwitterionic monomers are obtained by free-radical polymerization and thoroughly characterized. From the solubility tests, it is remarkable that the homopolymers produced are fully soluble in water, evidence of their high hydrophilicity. Copolymerization of the vinyl amide zwitterionic monomers, M2, M3, and M4 with the vinyl amide photo-crosslinker M5 proved to require very specific polymerization conditions. Nevertheless, copolymers were successfully obtained by free-radical copolymerization under appropriate conditions.
Moreover, in an attempt to mitigate the intrinsic hydrophobicity introduced in the copolymers by the photo-crosslinkers, and based on the proven affinity of quaternized diallylamines to copolymerize with vinyl amides, a new quaternized diallylamine sulfobetaine photo-crosslinker 3-(diallyl(2-(4-benzoylphenoxy)ethyl)ammonio)propane-1-sulfonate (M6) is synthesized. However, despite a priori promising copolymerization suitability, copolymerization with the vinyl amide zwitterionic monomers could not be achieved.
The widespread use of antimicrobial agents to treat infectious diseases has led to the emergence of antibiotic resistant pathogens. Plants have played a central role in combating many ailments in humans, and Parinari curatellifolia has been used for medicinal purposes. Seven extracts from P. curatellifolia leaves were prepared using serial exhaustive extraction of nonpolar to polar solvents. The microbroth dilution method was used to evaluate antimicrobial bioactivities of extracts. Five of the extracts were significantly active against at least one test microbe. Mycobacterium smegmatis was the most susceptible to most extracts. The methanol and ethanol extracts were the most active against M. smegmatis with an MIC of 25 mu g/mL. The hexane extract was the most active against Candida krusei with an MIC of 25 mu g/mL. None of the extracts significantly inhibited growth of Klebsiella pneumoniae and Staphylococcus aureus. Active extracts were selected for fractionation and isolation of pure compounds using gradient elution column chromatography. TLC analyses was carried out for pooling fractions of similar profiles. A total of 43 pools were obtained from 428 fractions. Pools 7 and 10 were selected for further isolation of single compounds. Four compounds, Pc4963r, Pc4962w, Pc6978p, and Pc6978o, were isolated. Evaluation of antimicrobial activities of Pc4963r, Pc4962w, and Pc6978p showed that the compounds were most active against C. krusei with MFC values ranging from 50 to 100 mu g/mL. Only Pc6978p was shown to be pure. Using spectroscopic analyses, the structure of Pc6978p was determined to be beta-sitosterol. The antifungal effects of beta-sitosterol were evaluated against C. krusei in vitro and on fabrics. Results showed that beta-sitosterol reduced the growth of C. krusei attached to Mendy fabric by 83%. Therefore, P. curatellifolia can be a source of lead compounds for prospective development of novel antimicrobial agents. Further work needs to be done to improve the antifungal activity of the isolated compound using quantitative structure-activity relationships.
We report on the multiple response of microgels triggered by a single optical stimulus. Under irradiation, the volume of the microgels is reversibly switched by more than 20 times. The irradiation initiates two different processes: photo-isomerization of the photo-sensitive surfactant, which forms a complex with the anionic microgel, rendering it photo-responsive; and local heating due to a thermo-plasmonic effect within the structured gold layer on which the microgel is deposited. The photo-responsivity is related to the reversible accommodation/release of the photo-sensitive surfactant depending on its photo-isomerization state, while the thermo-sensitivity is intrinsically built in. We show that under exposure to green light, the thermo-plasmonic effect generates a local hot spot in the gold layer, resulting in the shrinkage of the microgel. This process competes with the simultaneous photo-induced swelling. Depending on the position of the laser spot, the spatiotemporal control of reversible particle shrinking/swelling with a predefined extent on a per-second base can be implemented.
The degradation of polymers is described by mathematical models based on bond cleavage statistics including the decreasing probability of chain cuts with decreasing average chain length. We derive equations for the degradation of chains under a random chain cut and a chain end cut mechanism, which are compared to existing models. The results are used to predict the influence of internal molecular parameters. It is shown that both chain cut mechanisms lead to a similar shape of the mass or molecular mass loss curve. A characteristic time is derived, which can be used to extract the maximum length of soluble fragments l of the polymer. We show that the complete description is needed to extract the degradation rate constant k from the molecular mass loss curve and that l can be used to design polymers that lose less mechanical stability before entering the mass loss phase.
Functionalization of gelatin with glycidylmethacrylate (GMA-gelatin) enables network formation employing the double bond, so that the reaction is orthogonal to the inherent functional groups in the biomacromolecule. Here, network formation by crosslinking of GMA-gelatin with hexane 1,6-dithiol or nonane 1,9-dithiol to tailor properties and enable a shape-memory effect is shown by H-1 NMR and FT-IR spectroscopy. Hydrogel swelling (460-1900 vol%) and mechanical properties (Young's modulus E = 59-512 kPa, elongation at break epsilon(b) = 44-127%) depended on the molecular composition of the networks and temperature. Increased crosslinker length, thiol:methacrylate molar ratio, and precursor concentrations led to denser networks. Change of properties with temperature suggested adoption of triple helices by gelatin chains, forming physical netpoints at lower temperatures (< 20 degrees C). However, the limited freedom of the gelatin chains to move allowed only a minimal extent of triple helices formation, as it became apparent from the related signal in wide-angle X-ray scattering and the thermal transition associated to triple helices in some networks by DSC. The presented strategy is likely transferable to other biomacromolecules, and the results suggest that too short crosslinkers may result in a significant amount of grafting rather than network formation.
Effect of endothelial culture medium composition on platelet responses to polymeric biomaterials
(2021)
Near-physiological in vitro thrombogenicity test systems for the evaluation of blood-contacting endothelialized biomaterials requires co-cultivation with platelets (PLT). However, the addition of PLT has led to unphysiological endothelial cell (EC) detachment in such in vitro systems. A possible cause for this phenomenon may be PLT activation triggered by the applied endothelial cell medium, which typically consists of basal medium (BM) and nine different supplements. To verify this hypothesis, the influence of BM and its supplements was systematically analyzed regarding PLT responses. For this, human platelet rich plasma (PRP) was mixed with BM, BM containing one of nine supplements, or with BM containing all supplements together. PLT adherence analysis was carried out in six-channel slides with plasma-treated cyclic olefin copolymer (COC) and poly(tetrafluoro ethylene) (PTFE, as a positive control) substrates as part of the six-channel slides in the absence of EC and under static conditions. PLT activation and aggregation were analyzed using light transmission aggregometry and flow cytometry (CD62P). Medium supplements had no effect on PLT activation and aggregation. In contrast, supplements differentially affected PLT adherence, however, in a polymer- and donor-dependent manner. Thus, the use of standard endothelial growth medium (BM + all supplements) maintains functionality of PLT under EC compatible conditions without masking the differences of PLT adherence on different polymeric substrates. These findings are important prerequisites for the establishment of a near-physiological in vitro thrombogenicity test system assessing polymer-based cardiovascular implant materials in contact with EC and PLT.
Combining high hydrophilicity with charge neutrality, polyzwitterions are intensely explored for their high biocompatibility and low-fouling properties. Recent reports indicated that in addition to charge neutrality, the zwitterion's segmental dipole orientation is an important factor for interacting with the environment. Accordingly, a series of polysulfobetaines with a novel architecture was designed, in which the cationic and anionic groups of the zwitterionic moiety are placed at equal distances from the backbone. They were investigated by in vitro biofouling assays, covering proteins of different charges and model marine organisms. All polyzwitterion coatings reduced the fouling effectively compared to model polymer surfaces of poly(butyl methacrylate), with a nearly equally good performance as the reference polybetaine poly(3-(N-(2-(methacryloyloxy)ethyl)-N,N-dimethylammonio)propanesulfonate). The specific fouling resistance depended on the detailed chemical structure of the polyzwitterions. Still, while clearly affecting the performance, the precise dipole orientation of the sulfobetaine group in the polyzwitterions seems overall to be only of secondary importance for their antifouling behavior.
Hydrogels with a hierarchical structure were prepared from a new highly water-soluble crosslinker N,N,N',N'-tetramethyl-N,N'-bis(2-ethylmethacrylate)-propyl-1,3-diammonium dibromide and from the sulfobetaine monomer 2-(N-3-sulfopropyl-N,N-dimethyl ammonium)ethyl methacrylate. The free radical polymerization of the two compounds is rapid and yields near-transparent hydrogels with sizes up to 5 cm in diameter. Rheology shows a clear correlation between the monomer-to-crosslinker ratio and the storage and loss moduli of the hydrogels. Cryo-scanning electron microscopy, low-field nuclear magnetic resonance (NMR) spectroscopy, and small-angle X-ray scattering show that the gels have a hierarchical structure with features spanning the nanometer to the sub-millimeter scale. The NMR study is challenged by the marked inhomogeneity of the gels and the complex chemical structure of the sulfobetaine monomer. NMR spectroscopy shows how these complications can be addressed via a novel fitting approach that considers the mobility gradient along the side chain of methacrylate-based monomers.
In vivo endothelialization of polymer-based cardiovascular implant materials is a promising strategy to reduce the risk of platelet adherence and the subsequent thrombus formation and implant failure. However, endothelial cells from elderly patients are likely to exhibit a senescent phenotype that may counteract endothelialization. The senescence status of cells should therefore be investigated prior to implantation of devices designed to be integrated in the blood vessel wall. Here, human umbilical vein endothelial cells (HUVEC) were cultivated up to passage (P) 4, 10 and 26/27 to determine the population doubling time and the senescence status by four different methods. Determination of the senescence-associated beta-galactosidase activity (SA-beta-Gal) was carried out by colorimetric staining and microscopy (i), as well as by photometric quantification (ii), and the expression of senescence-associated nuclear proteins p16 and p21 as well as the proliferation marker Ki67 was assessed by immunostaining (iii), and by flow cytometry (iv). The population doubling time of P27-cells was remarkably greater (103 +/- 65 h) compared to P4-cells (24 +/- 3 h) and P10-cell (37 +/- 15 h). Among the four different methods tested, the photometric SA-beta-Gal activity assay and the flow cytometric determination of p16 and Ki67 were most effective in discriminating P27-cells from P4- and P10-cells. These methods combined with functional endothelial cell analyses might aid predictions on the performance of implant endothelialization in vivo.
The need for multifunctional materials is driven by emerging technologies and innovations, such as in the field of soft robotics and tactile or haptic systems, where minimizing the number of operational components is not only desirable, but can also be essential for realizing such devices. This study report on designing a multifunctional soft polymer material that can address a number of operating requirements such as solvent resistance, reshaping ability, self-healing capability, fluorescence stimuli-responsivity, and anisotropic structural functions. The numerous functional abilities are associated to rhodium(I)-phosphine coordination bonds, which in a polymer network act with their dynamic and non-covalently bonded nature as multifunctional crosslinks. Reversible aggregation of coordination bonds leads to changes in fluorescence emission intensity that responds to chemical or mechanical stimuli. The fast dynamics and diffusion of rhodium-phosphine ions across and through contacting areas of the material provide for reshaping and self-healing abilities that can be further exploited for assembly of multiple pieces into complex forms, all without any loss to material-sensing capabilities.
Tissue reconstruction has an unmet need for soft active scaffolds that enable gentle loading with regeneration-directing bioactive components by soaking up but also provide macroscopic dimensional stability. Here microporous hydrogels capable of an inverse shape-memory effect (iSME) are described, which in contrast to classical shape-memory polymers (SMPs) recover their permanent shape upon cooling. These hydrogels are designed as covalently photo cross-linked polymer networks with oligo(ethylene glycol)-oligo(propylene glycol)-oligo(ethylene glycol) (OEG-OPG-OEG) segments. When heated after deformation, the OEG-OPG-OEG segments form micelles fixing the temporary shape. Upon cooling, the micelles dissociate again, the deformation is reversed and the permanent shape is obtained. Applicability of this iSME is demonstrated by the gentle loading of platelet-rich plasma (PRP) without causing any platelet activation during this process. PRP is highly bioactive and is widely acknowledged for its regenerative effects. Hence, the microporous inverse shape-memory hydrogel (iSMH) with a cooling induced pore-size effect represents a promising candidate scaffold for tissue regeneration for potential usage in minimally invasive surgery applications.
Increasing the surface hydrophilicity of polyetherimide (PEI) through partial hydrolysis of the imide groups while maintaining the length of the main-chain was explored for adjusting its function in biomedical and membrane applications. The outcome of the polymer analogous reaction, i.e., the degree of ring opening and chain cleavage, is difficult to address in bulk and microstructured systems, as these changes only occur at the interface. Here, the reaction was studied at the air-water interface using the Langmuir technique, assisted by atomic force microscopy and vibrational spectroscopy. Slow PEI hydrolysis sets in at pH > 12. At pH = 14, the ring opening is nearly instantaneous. Reduction of the layer viscosity with time at pH = 14 suggested moderate chain cleavage. No hydrolysis was observed at pH = 1. Hydrolyzed PEI films had a much more cohesive structure, suggesting that the nanoporous morphology of PEI can be tuned via hydrolysis.
Layer-by-layer (LbL) self-assembly emerged as an efficient technique for fabricating coating systems for, e.g., drug delivery systems with great versatility and control. In this work, protecting group free and aqueous-based syntheses of bioinspired glycopolymer electrolytes aredescribed. Thin films of the glycopolymers are fabricated by LbL self-assembly and function as scaffolds for liposomes, which potentially can encapsulate active substances. The adsorbed mass, pH stability, and integrity of glycopolymer coatings as well as the embedded liposomes are investigated via whispering gallery mode (WGM) technology and quartz crystal microbalance with dissipation (QCM-D) monitoring , which enable label-free characterization. Glycopolymer thin films, with and without liposomes, are stable in the physiological pH range. QCM-D measurements verify the integrity of lipid vesicles. Thus, the fabrication of glycopolymer-based surface coatings with embedded and intact liposomes is presented.
The direct conversion of light from the sun into usable forms of energy marks one of the central cornerstones of the change of our living from the use of fossil, non-renewable energy resources towards a more sustainable economy. Besides the necessary societal changes necessary, it is the understanding of the solids employed that is of particular importance for the success of this target. In this work, the principles and approaches of systematic-crystallographic characterisation and systematisation of solids is used and employed to allow a directed tuning of the materials properties. The thorough understanding of the solid-state forms hereby the basis, on which more applied approaches are founded.
Two material systems, which are considered as promising solar absorber materials, are at the core of this work: halide perovskites and II-IV-N2 nitride materials. While the first is renowned for its high efficiencies and rapid development in the last years, the latter is putting an emphasis on true sustainability in that toxic and scarce elements are avoided.
We live in an era driven by fossil fuels. The prevailing climate change suggests that we have to significantly reduce greenhouse gas emissions. The only way forward is to use renewable energy sources. Among those, solar energy is a clean, affordable, and sustainable source of energy. It has the potential to satisfy the world’s energy demand in the future. However, there is a need to develop new materials that can make solar energy usable. Photovoltaics (PV) are devices that convert photon energy into electrical energy. The most commonly used solar cells are based on crystalline silicon. However, the fabrication process for silicon solar cells is technologically difficult and costly. Solar cells based on lead halide perovskites (PSCs) have emerged as a new candidate for PV applications since 2009. To date, PSCs have achieved 26% power-conversion-efficiency (PCE) for its single junction, and 33.7% PCE for tandem junction devices. However, there is still room for improvement in overall performance. The main challenge for the commercialization of this technology is the stability of the solar cells under operational conditions. Inorganic perovskite CsPbI3 has attracted researchers’ interest due to its stability at elevated temperatures, however, inorganic perovskites also have associated challenges, e.g. phase stability, larger voltage loss compared to their organic-inorganic hybrid counterparts, and interface energy misalignment. The most efficient inorganic perovskite solar cell is stable for up to a few hundred hours while the most stable device in the field of inorganic PSCs reported so far is at 17% PCE. This suggests the need for improvement of the interfaces for enhanced open circuit voltage (VOC), and optimization of the energy alignment at the interfaces. This dissertation presents the study on interfaces between the perovskite layer and hole transport layer (HTL) for stable CsPbI3 solar cells.
The first part of the thesis presents an investigation of the CsPbI3 film annealing environment and its subsequent effects on the perovskite/HTL interface dynamics. Thin films annealed in dry air were compared with thin films annealed in ambient air. Synchrotron-based hard X-ray spectroscopy (HAXPES) measurements reveal that annealing in ambient air does not have an adverse effect; instead, those samples undergo surface band bending. This surface band modification induces changes in interface charge dynamics and, consequently, an improvement in charge extraction at the interfaces. Further, transient surface photovoltage (tr-SPV) simulations show that air-annealed samples exhibit fewer trap states compared to samples annealed in dry air. Finally, by annealing the CsPbI3 films in ambient air, a PCE of 19.8% and Voc of 1.23 V were achieved for an n-i-p structured device.
Interface engineering has emerged as a strategy to extract the charge and optimize the energy alignment in perovskite solar cells (PSCs). An interface with fewer trap states and energy band levels closer to the selective contact helps to attain improved efficiencies in PSCs. The second part of the thesis presents a design for the CsPbI3/HTM interface. In this work, an interface between CsPbI3 perovskite and its hole selective contact N2,N2,N2′,N2′,N7,N7,N7′,N7′-octakis(4-methoxyphenyl)-9,9′-spirobi[9H-fluorene]-2,2′,7,7′-tetramine(Spiro-OMeTAD), realized by trioctylphosphine oxide (TOPO), a dipole molecule is introduced. On top of a perovskite film well-passivated by n-octyl ammonium Iodide (OAI), it created an upward surface band-bending at the interface byTOPO that optimizes energy level alignment and enhances the extraction of holes from the perovskite layer to the hole transport material. Consequently, a Voc of 1.2 V and high-power conversion efficiency (PCE) of over 19% were achieved for inorganic CsPbI3 perovskite solar cells. In addition, the work also sheds light on the interfacial charge-selectivity and the long-term stability of CsPbI3 perovskite solar cells.
The third part of the thesis extends the previous studies to polymeric poly(3-hexylthiophene-2,5-diyl) (P3HT) as HTL. The CsPbI3/P3HT interface is critical due to high non-radiative recombination. This work presents a CsPbI3/P3HT interface modified with a long-chain alkyl halide molecule, n-hexyl trimethyl ammonium bromide (HTAB). This molecule largely passivates the CsPbI3 perovskite surface and improves the charge extraction across the interface. Consequently, a Voc of over 1.00 V and 14.2% PCE were achieved for CsPbI3 with P3HT as HTM.
Overall the results presented in this dissertation introduce and discuss methods to design and study the interfaces in CsPbI3-based solar cells. This study can pave the way for novel interface designs between CsPbI3 and HTM for charge extraction, efficiency and stability.
Ionic guest in ionic host
(2022)
Ionosilica ionogels, i.e. composites consisting of an ionic liquid (IL) guest confined in an ionosilica host matrix, were synthesized via a non-hydrolytic sol-gel procedure from a tris-trialcoxysilylated amine precursor using the IL [BMIM]NTf2 as solvent. Various ionosilica ionogels were prepared starting from variable volumes of IL in the presence of formic acid. The resulting brittle and nearly colourless monoliths are composed of different amounts of IL guests confined in an ionosilica host as evidenced via thermogravimetric analysis, FT-IR, and C-13 CP-MAS solid-state NMR spectroscopy. In the following, we focused on confinement effects between the ionic host and guest. Special host-guest interactions between the IL guest and the ionosilica host were evidenced by H-1 solid-state NMR, Raman spectroscopy, and broadband dielectric spectroscopy (BDS) measurements. The three techniques indicate a strongly reduced ion mobility in the ionosilica ionogel composites containing small volume fractions of confined IL, compared to conventional silica-based ionogels. We conclude that the ionic ionosilica host stabilizes an IL layer on the host surface; this then results in a strongly reduced ion mobility compared to conventional silica hosts. The ion mobility progressively increases for systems containing higher volume fractions of IL and finally reaches the values observed in conventional silica based ionogels. These results therefore point towards strong interactions and confinement effects between the ionic host and the ionic guest on the ionosilica surface. Furthermore, this approach allows confining high volume fractions of IL into self-standing monoliths while preserving high ionic conductivity. These effects may be of interest in domains where IL phases must be anchored on solid supports to avoid leaching or IL spilling, e.g., in catalysis, in gas separation/sequestration devices or for the elaboration of solid electrolytes for (lithium-ion) batteries and supercapacitors.
Polymeric antimicrobial peptide mimics are a promising alternative for the future management of the daunting problems associated with antimicrobial resistance. However, the development of successful antimicrobial polymers (APs) requires careful control of factors such as amphiphilic balance, molecular weight, dispersity, sequence, and architecture. While most of the earlier developed APs focus on random linear copolymers, the development of APs with advanced architectures proves to be more potent. It is recently developed multivalent bottlebrush APs with improved antibacterial and hemocompatibility profiles, outperforming their linear counterparts. Understanding the rationale behind the outstanding biological activity of these newly developed antimicrobials is vital to further improving their performance. This work investigates the physicochemical properties governing the differences in activity between linear and bottlebrush architectures using various spectroscopic and microscopic techniques. Linear copolymers are more solvated, thermo-responsive, and possess facial amphiphilicity resulting in random aggregations when interacting with liposomes mimicking Escheria coli membranes. The bottlebrush copolymers adopt a more stable secondary conformation in aqueous solution in comparison to linear copolymers, conferring rapid and more specific binding mechanism to membranes. The advantageous physicochemical properties of the bottlebrush topology seem to be a determinant factor in the activity of these promising APs.
The lack of anionic carboxylate ligands on the surface of InP/ZnSe/ZnS quantum dots (QDs), where zinc carboxylate ligands can be converted to carboxylic acid or carboxylate ligands via proton transfer by 1-octanethiol, is demonstrated. The as-synthesized QDs initially have an under-coordinated vacancy surface, which is passivated by solvent ligands such as ethanol and acetone. Upon exposure of 1-octanethiol to the QD surface, 1-octanethiol effectively induces the surface binding of anionic carboxylate ligands (derived from zinc carboxylate ligands) by proton transfer, which consequently exchanges ethanol and acetone ligands that bind on the incomplete QD surface. These systematic chemical analyses, such as thermogravimetric analysis-mass spectrometry and proton nuclear magnetic resonance spectroscopy, directly show the interplay of surface ligands, and it associates with QD light-emitting diodes (QD-LEDs). It is believed that this better understanding can lead to industrially feasible QD-LEDs.
The reliance on fossil fuels has resulted in an abnormal increase in the concentration of greenhouse gases, contributing to the global climate crisis. In response, a rapid transition to renewable energy sources has begun, particularly lithium-ion batteries, playing a crucial role in the green energy transformation. However, concerns regarding the availability and geopolitical implications of lithium have prompted the exploration of alternative rechargeable battery systems, such as sodium-ion batteries. Sodium is significantly abundant and more homogeneously distributed in the crust and seawater, making it easier and less expensive to extract than lithium. However, because of the mysterious nature of its components, sodium-ion batteries are not yet sufficiently advanced to take the place of lithium-ion batteries. Specifically, sodium exhibits a more metallic character and a larger ionic radius, resulting in a different ion storage mechanism utilized in lithium-ion batteries. Innovations in synthetic methods, post-treatments, and interface engineering clearly demonstrate the significance of developing high-performance carbonaceous anode materials for sodium-ion batteries. The objective of this dissertation is to present a systematic approach for fabricating efficient, high-performance, and sustainable carbonaceous anode materials for sodium-ion batteries. This will involve a comprehensive investigation of different chemical environments and post-modification techniques as well.
This dissertation focuses on three main objectives. Firstly, it explores the significance of post-synthetic methods in designing interfaces. A conformal carbon nitride coating is deposited through chemical vapor deposition on a carbon electrode as an artificial solid-electrolyte interface layer, resulting in improved electrochemical performance. The interaction between the carbon nitride artificial interface and the carbon electrode enhances initial Coulombic efficiency, rate performance, and total capacity. Secondly, a novel process for preparing sulfur-rich carbon as a high-performing anode material for sodium-ion batteries is presented. The method involves using an oligo-3,4-ethylenedioxythiophene precursor for high sulfur content hard carbon anode to investigate the sulfur heteroatom effect on the electrochemical sodium storage mechanism. By optimizing the condensation temperature, a significant transformation in the materials’ nanostructure is achieved, leading to improved electrochemical performance. The use of in-operando small-angle X-ray scattering provides valuable insights into the interaction between micropores and sodium ions during the electrochemical processes. Lastly, the development of high-capacity hard carbon, derived from 5-hydroxymethyl furfural, is examined. This carbon material exhibits exceptional performance at both low and high current densities. Extensive electrochemical and physicochemical characterizations shed light on the sodium storage mechanism concerning the chemical environment, establishing the material’s stability and potential applications in sodium-ion batteries.
Supramolecular polymers or fibers are non-covalent assemblies of unimeric building blocks connected by secondary interactions such as hydrogen bonds or pi-pi interactions. Such structures hold enormous potential in the development of future materials, as their non-covalent nature makes them highly modular and adaptive. Within this review we aim to provide a broad overview over the area of linear supramolecular polymers including the different mechanisms of their polymerization as well as methods essential for their characterization. The different non-covalent interactions able to form supramolecular polymers are discussed, and key examples for each species are shown. Particular emphasis is laid on the development of living supramolecular polymerization able to produce fibers with a controlled length and low length dispersity, and even enable the production of supramolecular block copolymers. Another important and very recent field is the development of out-of-equilibrium supramolecular polymers, where the polymerization process can be temporally controlled enabling access to highly adaptive materials.
We propose a simple and eco-friendly method for the formation of composite protein-mineral-microcapsules induced by ultrasound treatment. Protein- and nanoparticle-stabilized oil-in-water (O/W) emulsions loaded with different oils are prepared using high-intensity ultrasound. The formation of thin composite mineral proteinaceous shells is realized with various types of nanoparticles, which are pre-modified with Bovine Serum Albumin (BSA) and subsequently characterized by EDX, TGA, zeta potential measurements and Raman spectroscopy. Cryo-SEM and EDX mapping visualizations show the homogeneous distribution of the densely packed nanoparticles in the capsule shell. In contrast to the results reported in our previous paper,(1) the shell of those nanostructured composite microcapsules is not cross-linked by the intermolecular disulfide bonds between BSA molecules. Instead, a Pickering-Emulsion formation takes place because of the amphiphilicity-driven spontaneous attachment of the BSA-modified nanoparticles at the oil/water interface. Using colloidal particles for the formation of the shell of the microcapsules, in our case silica, hydroxyapatite and calcium carbonate nanoparticles, is promising for the creation of new functional materials. The nanoparticulate building blocks of the composite shell with different chemical, physical or morphological properties can contribute to additional, sometimes even multiple, features of the resulting capsules. Microcapsules with shells of densely packed nanoparticles could find interesting applications in pharmaceutical science, cosmetics or in food technology.
Among the high-performance and engineering polymers, polyimides and the closely related polyetherimide (PEI) stand out by their capability to react with nucleophiles under relatively mild conditions. By targeting the phthalimide groups in the chain backbone, post-functionalization offers a pathway to adjust surface properties such as hydrophilicity, solvent resistance, and porosity. Here, we use ultrathin PEI films on a Langmuir trough as a model system to investigate the surface functionalization with ethylene diamine and tetrakis(4-aminophenyl)porphyrin as multivalent nucleophiles. By means of AFM, Raman spectroscopy, and interfacial rheology, we show that hydrolysis enhances the chemical and mechanical stability of ultrathin films and allows for the formation of EDC/NHS-activated esters. Direct amidation of PEI was achieved in the presence of a Lewis acid catalyst, resulting in free amine groups rather than cross-linking. When comparing amidation with hydrolysis, we find a greater influence of the latter on material properties.
The manuscript describes the phytochemical investigation of the roots, leaves and stem bark of Millettia lasiantha resulting in the isolation of twelve compounds including two new isomeric isoflavones lascoumestan and las-coumaronochromone. The structures of the new compounds were determined using different spectroscopic techniques.
When new covalent organic frameworks (COFs) are designed, the main efforts are typically focused on selecting specific building blocks with certain geometries and properties to control the structure and function of the final COFs. The nature of the linkage (imine, boroxine, vinyl, etc.) between these building blocks naturally also defines their properties. However, besides the linkage type, the orientation, i.e., the constitutional isomerism of these linkages, has rarely been considered so far as an essential aspect. In this work, three pairs of constitutionally isomeric imine-linked donor-acceptor (D-A) COFs are synthesized, which are different in the orientation of the imine bonds (D-C=N-A (DCNA) and D-N=C-A (DNCA)). The constitutional isomers show substantial differences in their photophysical properties and consequently in their photocatalytic performance. Indeed, all DCNA COFs show enhanced photocatalytic H2 evolution performance than the corresponding DNCA COFs. Besides the imine COFs shown here, it can be concluded that the proposed concept of constitutional isomerism of linkages in COFs is quite universal and should be considered when designing and tuning the properties of COFs.
This paper discusses the full structural solution of the hybrid perovskite formamidinium lead tribromide (FAPbBr(3)) and its temperature-dependent phase transitions in the range from 3 K to 300 K using neutron powder diffraction and synchrotron X-ray diffraction. Special emphasis is put on the influence of deuteration on formamidinium, its position in the unit cell and disordering in comparison to fully hydrogenated FAPbBr(3). The temperature-dependent measurements show that deuteration critically influences the crystal structures, i.e. results in partially-ordered temperature-dependent structural modifications in which two symmetry-independent molecule positions with additional dislocation of the molecular centre atom and molecular angle inclinations are present.
Experimental and kinetic modelling studies are presented to investigate the mechanism of 3,3 ',5,5 '-tetramethylbenzidine (TMB) oxidation by hydrogen peroxide (H2O2) catalyzed by peroxidase-like Pt nanoparticles immobilized in spherical polyelectrolyte brushes (SPB-Pt). Due to the high stability of SPB-Pt colloidal, this reaction can be monitored precisely in situ by UV/VIS spectroscopy. The time-dependent concentration of the blue-colored oxidation product of TMB expressed by different kinetic models was used to simulate the experimental data by a genetic fitting algorithm. After falsifying the models with abundant experimental data, it is found that both H2O2 and TMB adsorb on the surface of Pt nanoparticles to react, indicating that the reaction follows the Langmuir-Hinshelwood mechanism. A true rate constant k, characterizing the rate-determining step of the reaction and which is independent on the amount of catalysts used, is obtained for the first time. Furthermore, it is found that the product adsorbes strongly on the surface of nanoparticles, thus inhibiting the reaction. The entire analysis provides a new perspective to study the catalytic mechanism and evaluate the catalytic activity of the peroxidase-like nanoparticles.
The adsorption of protonated L-cysteine onto Au(111) surface was studied via molecular dynamics method. The detailed examination of trajectories reveals that a couple of picoseconds need to be strongly adsorbed at the gold surface via L-cysteine's sulfur and oxygen atoms. The average distances of L-cysteine's adsorbed sulfur and oxygen from gold plane are-2.7 angstrom and-3.2 angstrom, correspondingly. We found that the adsorption of L-cysteine takes place preferentially at bridge site with possibility of-82%. Discussing the conformation features of protonated L-cysteine, we consider that the most stable conformation of protonated L-cysteine is "reverse boat" position, where sulfur and oxygen pointed down to the gold surface, while the amino group is far from the gold surface.
Recent experiments on laser-dissociation of aligned homonuclear diatomic molecules show an asymmetric forward-backward (spatial) electron-localization along the laser polarization axis. Most theoretical models attribute this asymmetry to interference effects between gerade and ungerade vibronic states. Presumably due to alignment, these models neglect molecular rotations and hence infer an asymmetric (post-dissociation) charge distribution over the two identical nuclei. In this paper, we question the equivalence that is made between spatial electron-localization, observed in experiments, and atomic electron-localization, alluded by these theoretical models. We show that (seeming) agreement between these models and experiments is due to an unfortunate omission of nuclear permutation symmetry, i.e., quantum statistics. Enforcement of the latter requires mandatory inclusion of the molecular rotational degree of freedom, even for perfectly aligned molecules. Unlike previous interpretations, we ascribe spatial electron-localization to the laser creation of a rovibronic wavepacket that involves field-free molecular eigenstates with opposite space-inversion symmetry i.e., even and odd parity. Space-inversion symmetry breaking would then lead to an asymmetric distribution of the (space-fixed) electronic density over the forward and backward hemisphere. However, owing to the simultaneous coexistence of two indistinguishable molecular orientational isomers, our analytical and computational results show that the post-dissociation electronic density along a specified space-fixed axis is equally shared between the two identical nuclei-a result that is in perfect accordance with the principle of the indistinguishability of identical particles. Published under an exclusive license by AIP Publishing.
Glyco-assemblies derived from amphiphilic sugar-decorated block copolymers (ASBCs) have emerged prominently due to their wide application, for example, in biomedicine and as drug carriers. However, to efficiently construct these glyco-assemblies is still a challenge. Herein, we report an efficient technology for the synthesis of glyco-inside nano-assemblies by utilizing RAFT polymerization of a galactose-decorated methacrylate for polymerization-induced self-assembly (PISA). Using this approach, a series of highly ordered glyco-inside nano-assemblies containing intermediate morphologies were fabricated by adjusting the length of the hydrophobic glycoblock and the polymerization solids content. A specific morphology of complex vesicles was captured during the PISA process and the formation mechanism is explained by the morphology of its precursor and intermediate. Thus, this method establishes a powerful route to fabricate glyco-assemblies with tunable morphologies and variable sizes, which is significant to enable the large-scale fabrication and wide application of glyco-assemblies.
Collagen-based biomaterials with oriented fibrils have shown great application potential in medicine. However, it is still challenging to control the type I collagen fibrillogenesis in ultrathin films. Here, we report an approach to produce cohesive and well-organized type I collagen ultrathin films of about 10 nm thickness using the Langmuir-Blodgett technique. Ellipsometry, rheology, and Brewster angle microscopy are applied to investigate in situ how the molecules behave at the air-water interface, both at room temperature and 37 degrees C. The interfacial storage modulus observed at room temperature vanishes upon heating, indicating the existence and disappearance of the network structure in the protein nanosheet. The films were spanning over holes as large as 1 mm diameter when transferred at room temperature, proving the strong cohesive interactions. A highly aligned and fibrillar structure was observed by atomic force microscopy (AFM) and optical microscopy.
Four new hexanuclear niobium cluster compounds of the general formula [Nb6Cl12(HIm)(6)](A)(n) . x(solvent molecule) (HIm=1H-imidazole, A=mineral acid anion, Cl- (n=2) (1), (SO4)(2-) (n=1) (2), (CrO4)(2-) (n=1) (3), and (HAsO4)(2-) (n=1) (4)) were prepared. Their synthesis can be done in basic ionic liquids, which form on the addition of a mineral acid, which also delivers the counter anion for the final cluster compound, to an excess of the 1H-imidazole. Some addition of an auxiliary solvent, like methanol, improves the speed of crystallisation. The cluster unit comprises a hexanuclear Nb-6 unit of octahedral shape with the edges bridged by Cl atoms and the exo sites being occupied by N-bonded 1H-imidazole ligands. The cluster cation carries sixteen cluster-based electrons. Between the NH groups of the ligands of the cluster unit, the anions and the co-crystallised water (1), or 1H-imidazole and methanol molecules (2, 3, and 4) a network of hydrogen bonds exists.
I-III-VI2 semiconductor nanocrystals have been applied to a host of energy conversion devices with great success. Large scale implementation of device concepts based on these materials has, however, been somewhat stymied by the strong role of defects in determining the optoelectronic characteristics of these materials. Here we present a perspective view of the role of electronic structure and defects on the physical properties, particularly the spectroscopy, of this family of materials. Applications of these materials are further discussed in this context.
We present a divergent strategy for the fluorination of phenylacetic acid derivatives that is induced by a charge-transfer complex between Selectfluor and 4-(dimethylamino)pyridine. A comprehensive investigation of the conditions revealed a critical role of the solvent on the reaction outcome. In the presence of water, decarboxylative fluorination through a single-electron oxidation is dominant. Non-aqueous conditions result in the clean formation of alpha-fluoro-alpha-arylcarboxylic acids.
Laser-induced breakdown spectroscopy (LIBS) analysers are becoming increasingly common for material classification purposes. However, to achieve good classification accuracy, mostly noncompact units are used based on their stability and reproducibility. In addition, computational algorithms that require significant hardware resources are commonly applied. For performing measurement campaigns in hard-to-access environments, such as mining sites, there is a need for compact, portable, or even handheld devices capable of reaching high measurement accuracy. The optics and hardware of small (i.e., handheld) devices are limited by space and power consumption and require a compromise of the achievable spectral quality. As long as the size of such a device is a major constraint, the software is the primary field for improvement. In this study, we propose a novel combination of handheld LIBS with non-negative tensor factorisation to investigate its classification capabilities of copper minerals. The proposed approach is based on the extraction of source spectra for each mineral (with the use of tensor methods) and their labelling based on the percentage contribution within the dataset. These latent spectra are then used in a regression model for validation purposes. The application of such an approach leads to an increase in the classification score by approximately 5% compared to that obtained using commonly used classifiers such as support vector machines, linear discriminant analysis, and the k-nearest neighbours algorithm.
This study aims to explore the photoinitiated cationic ring-opening polymerization of levoglucosenyl methyl ether (LGME), a chemical obtained from the most abundant biomass - cellulose. Direct and sensitized photopolymerizations of LGME using photoinitiators acting at the near UV or visible range in conjunction with diphenyliodonium hexafluoroantimonate (DPI) yielded unsaturated polyacetals with varying molar masses and distributions.
Despite intensive research on porous carbon materials as hosts for sulfur in lithium-sulfur battery cathodes, it remains a problem to restrain the soluble lithium polysulfide intermediates for a long-term cycling stability without the use of metallic or metal-containing species. Here, we report the synthesis of nitrogen-doped carbon materials with hierarchical pore architecture and a core-shell-type particle design including an ordered mesoporous carbon core and a polar microporous carbon shell. The initial discharge capacity with a sulfur loading up to 72 wt% reaches over 900 mA h g(sulf)(ur)(-1) at a rate of C/2. Cycling performance measured at C/2 indicates similar to 90% capacity retention over 250 cycles. In comparison to other carbon hosts, this architecture not only provides sufficient space for a high sulfur loading induced by the high-pore-volume particle core, but also enables a dual effect of physical and chemical confinement of the polysulfides to stabilize the cycle life by adsorbing the soluble intermediates in the polar microporous shell. This work elucidates a design principle for carbonaceous hosts that is capable to provide simultaneous physical-chemical confinement. This is necessary to overcome the shuttle effect towards stable lithium-sulfur battery cathodes, in the absence of additional membranes or inactive metal-based anchoring materials.
On-demand motion of highly swollen polymer systems can be triggered by changes in pH, ion concentrations, or by heat. Here, shape-programmable, architectured hydrogels are introduced, which respond to ultrasonic-cavitation-based mechanical forces (CMF) by directed macroscopic movements. The concept is the implementation and sequential coupling of multiple functions (swellability in water, sensitivity to ultrasound, shape programmability, and shape-memory) in a semi-interpenetrating polymer network (s-IPN). The semi-IPN-based hydrogels are designed to function through rhodium coordination (Rh-s-IPNH). These coordination bonds act as temporary crosslinks. The porous hydrogels with coordination bonds (degree of swelling from 300 +/- 10 to 680 +/- 60) exhibit tensile strength sigma(max) up to 250 +/- 60 kPa. Shape fixity ratios up to 90% and shape recovery ratios up to 94% are reached. Potential applications are switches or mechanosensors.
We present a microcontact printing (mu CP) routine suitable to introduce defined (sub-) microscale patterns on surface substrates exhibiting a high capillary activity and receptive to a silane-based chemistry. This is achieved by transferring functional trivalent alkoxysilanes, such as (3-aminopropyl)-triethoxysilane (APTES) as a low-molecular weight ink via reversible covalent attachment to polymer brushes grafted from elastomeric polydimethylsiloxane (PDMS) stamps. The brushes consist of poly{N-[tris(hydroxymethyl)-methyl]acrylamide} (PTrisAAm) synthesized by reversible addition-fragmentation chain-transfer (RAFT)-polymerization and used for immobilization of the alkoxysilane-based ink by substituting the alkoxy moieties with polymer-bound hydroxyl groups. Upon physical contact of the silane-carrying polymers with surfaces, the conjugated silane transfers to the substrate, thus completely suppressing ink-flow and, in turn, maximizing printing accuracy even for otherwise not addressable substrate topographies. We provide a concisely conducted investigation on polymer brush formation using atomic force microscopy (AFM) and ellipsometry as well as ink immobilization utilizing two-dimensional proton nuclear Overhauser enhancement spectroscopy (H-1-H-1-NOESY-NMR). We analyze the mu CP process by printing onto Si-wafers and show how even distinctively rough surfaces can be addressed, which otherwise represent particularly challenging substrates.
CH2 + O-2
(2022)
The singlet and triplet potential surfaces for the title reaction were investigated using the CBS-QB3 level of theory. The wave functions for some species exhibited multireference character and required the CASPT2/6-31+G(d,p) and CASPT2/aug-cc-pVTZ levels of theory to obtain accurate relative energies. A Natural Bond Orbital Analysis showed that triplet (CH2OO)-C-3 (the simplest Criegee intermediate) and (CH2O2)-C-3 (dioxirane) have mostly polar biradical character, while singlet (CH2OO)-C-1 has some zwitterionic character and a planar structure. Canonical variational transition state theory (CVTST) and master equation simulations were used to analyze the reaction system. CVTST predicts that the rate constant for reaction of (CH2)-C-1 + O-3(2) is more than ten times as fast as the reaction of (CH2)-C-3 ((XB1)-B-3) + O-3(2) and the ratio remains almost independent of temperature from 900 K to 3000 K. The master equation simulations predict that at low pressures the (CH2O)-C-1 + O-3 product set is dominant at all temperatures and the primary yield of OH radicals is negligible below 600 K, due to competition with other primary reactions in this complex system.
exo-Methylene-beta-lactams were synthesized in two steps from commercially available 3-bromo-2-(bromomethyl)-propionic acid and reacted with arene diazonium salts in a Heck-type arylation in the presence of catalytic amounts of Pd(OAc)(2) under ligand-free conditions. The products, arylidene-beta-lactams, were obtained in high yields as single isomers. The beta-hydride elimination step of the Pd-catalyzed coupling reaction proceeds with high exo-regioselectivity and E-stereoselectivity. With aryl iodides, triflates, or bromides, the coupling products were isolated only in low yields, due to extensive decomposition of the starting material at elevated temperatures. This underlines that arene diazonium salts can be superior arylating reagents in Heck-type reactions and yield coupling products in synthetically useful yields and selectivities when conventional conditions fail.
Metal sulfide nanoparticle synthesis with ionic liquids state of the art and future perspectives
(2021)
Metal sulfides are among the most promising materials for a wide variety of technologically relevant applications ranging from energy to environment and beyond. Incidentally, ionic liquids (ILs) have been among the top research subjects for the same applications and also for inorganic materials synthesis. As a result, the exploitation of the peculiar properties of ILs for metal sulfide synthesis could provide attractive new avenues for the generation of new, highly specific metal sulfides for numerous applications. This article therefore describes current developments in metal sulfide nano-particle synthesis as exemplified by a number of highlight examples. Moreover, the article demonstrates how ILs have been used in metal sulfide synthesis and discusses the benefits of using ILs over more traditional approaches. Finally, the article demonstrates some technological challenges and how ILs could be used to further advance the production and specific property engineering of metal sulfide nanomaterials, again based on a number of selected examples.
"Water-in-salt" (WIS) electrolytes have emerged as an excellent superconcentrated ionic medium for high-power energy storage systems such as supercapacitors due to their extended working potential compared to the conventional dilute aqueous electrolyte. In this work, we have investigated the performance of WIS supercapacitors using hollow carbon nanoplates as electrodes and compared it to that based on the conventional "salt-in-water" electrolytes. Moreover, the potentiostatic electrochemical impedance spectroscopy has been employed to provide an insightful look into the charge transport properties, which also, for the first time, reveals the formation of a solid-electrolyte interphase (SEI and their temperature-dependent impedance for charge transfer and adsorption. Furthermore, the effect of temperature on the electrochemical performance of the WIS supercapacitors in the temperature range from 15 to 60 degrees C has been studied, which presents a gravimetric capacitance of 128 F g(-1) and a volumetric capacitance of 197.12 F cm(-3) at 55 degrees C compared to 87.5 F g(-1) and 134.75 F cm(-3) at 15 degrees C. The in-depth understanding about the formation of SEI layer and the electrochemical performance at different temperatures for WIS supercapacitors will assist the efforts toward designing better aqueous electrolytes for supercapacitors.
The chemical nature, the number length of integrated building blocks, as well as their sequence structure impact the phase morphology of multiblock copolymers (MBC) consisting of two non-miscible block types. We hypothesized that a strictly alternating sequence should favour phase segregation and in this way the elastic properties. A library of well-defined MBCs composed of two different hydrophobic, semi-crystalline blocks providing domains with well-separated melting temperatures (T(m)s) were synthesized from the same type of precursor building blocks as strictly alternating (MBCsalt) or random (MBCsran) MBCs and compared. Three different series of MBCsalt or MBCsran were synthesized by high-throughput synthesis by coupling oligo(e-caprolactone) (OCL) of different molecular weights (2, 4, and 8 kDa) with oligotetrahydrofuran (OTHF, 2.9 kDa) via Steglich esterification in which the molar ratio of the reaction partners was slightly adjusted. Maximum of weight average molecular weight (M-w) were 65,000 g center dot mol(-1), 165,000 g center dot mol(-1), and 168,000 g center dot mol(-1) for MBCsalt and 80,500 g center dot mol(-1), 100,000 g center dot mol(-1), and 147,600 g center dot mol(-1) for MBCsran. When Mw increased, a decrease of both Tms associated to the melting of the OCL and OTHF domains was observed for all MBCs. T-m (OTHF) of MBCsran was always higher than Tm (OTHF) of MBCsalt, which was attributed to a better phase segregation. In addition, the elongation at break of MBCsalt was almost half as high when compared to MBCsran. In this way this study elucidates role of the block length and sequence structure in MBCs and enables a quantitative discussion of the structure-function relationship when two semi-crystalline block segments are utilized for the design of block copolymers.
The high solids semicontinuous emulsion polymerization of polyvinyl acetate using poly (vinyl alcohol-co-vinyl acetate) as protective colloid is investigated by optical spectroscopy. The suitability of Photon Density Wave (PDW) spectroscopy as inline Process Analytical Technology (PAT) for emulsion polymerization processes at high solid contents (>40% (w/w)) is studied and evaluated. Inline data on absorption and scattering in the dispersion is obtained in real-time. The radical polymerization of vinyl acetate to polyvinyl acetate using ascorbic acid and sodium persulfate as redox initiator system and poly (vinyl alcohol-co-vinyl acetate) as protective colloid is investigated. Starved-feed radical emulsion polymerization yielded particle sizes in the nanometer size regime. PDW spectroscopy is used to monitor the progress of polymerization by studying the absorption and scattering properties during the synthesis of dispersions with increasing monomer amount and correspondingly decreasing feed rate of protective colloid. Results are compared to particle sizes determined with offline dynamic light scattering (DLS) and static light scattering (SLS) during the synthesis.
While zwitterionic interfaces are known for their excellent low-fouling properties, the underlying molecular principles are still under debate. In particular, the role of the zwitterion orientation at the interface has been discussed recently. For elucidation of the effect of this parameter, self-assembled monolayers (SAMs) on gold were prepared from stoichiometric mixtures of oppositely charged alkyl thiols bearing either a quaternary ammonium or a carboxylate moiety. The alkyl chain length of the cationic component (11-mercaptoundecyl)-N,N,N-trimethylammonium, which controls the distance of the positively charged end group from the substrate's surface, was kept constant. In contrast, the anionic component and, correspondingly, the distance of the negatively charged carboxylate groups from the surface was varied by changing the alkyl chain length in the thiol molecules from 7 (8-mercaptooctanoic acid) to 11 (12-mercaptododecanoic acid) to 15 (16-mercaptohexadecanoic acid). In this way, the charge neutrality of the coating was maintained, but the charged groups exposed at the interface to water were varied, and thus, the orientation of the dipoles in the SAMs was altered. In model biofouling studies, protein adsorption, diatom accumulation, and the settlement of zoospores were all affected by the altered charge distribution. This demonstrates the importance of the dipole orientation in mixed-charged SAMs for their inertness to nonspecific protein adsorption and the accumulation of marine organisms. Overall, biofouling was lowest when both the anionic and the cationic groups were placed at the same distance from the substrate's surface.
Poly(lactide-co-glycolide)s are commercially available degradable implant materials, which are typically selected based on specifications given by the manufacturer, one of which is their molecular weight. Here, we address the question whether variations in the chain length and their distribution affect the degradation behavior of Poly[(rac-lactide)-co-glycolide]s (PDLLGA). The hydrolysis was studied in ultrathin films at the air-water interface in order to rule out any morphological effects. We found that both for purely hydrolytic degradation as well as under enzymatic catalysis, the molecular weight has very little effect on the overall degradation kinetics of PDLLGAs. The quantitative analysis suggested a random scission mechanism. The monolayer experiments showed that an acidic micro-pH does not accelerate the degradation of PDLLGAs, in contrast to alkaline conditions. The degradation experiments were combined with interfacial rheology measurements, which showed a drastic decrease of the viscosity at little mass loss. The extrapolated molecular weight behaved similar to the viscosity, dropping to a value near to the solubility limit of PDLLGA oligomers before mass loss set in. This observation suggests a solubility controlled degradation of PDLLGA. Conclusively, the molecular weight affects the degradation of PDLLGA devices mostly in indirect ways, e.g. by determining their morphology and porosity during fabrication. Our study demonstrates the relevance of the presented Langmuir degradation method for the design of controlled release systems.
The electronic structure of the metal-organic interface of isolated ligand coated gold nanoparticles
(2022)
Light induced electron transfer reactions of molecules on the surface of noble metal nanoparticles (NPs) depend significantly on the electronic properties of the metal-organic interface. Hybridized metal-molecule states and dipoles at the interface alter the work function and facilitate or hinder electron transfer between the NPs and ligand. X-ray photoelectron spectroscopy (XPS) measurements of isolated AuNPs coated with thiolated ligands in a vacuum have been performed as a function of photon energy, and the depth dependent information of the metal-organic interface has been obtained. The role of surface dipoles in the XPS measurements of isolated ligand coated NPs is discussed and the binding energy of the Au 4f states is shifted by around 0.8 eV in the outer atomic layers of 4-nitrothiophenol coated AuNPs, facilitating electron transport towards the molecules. Moreover, the influence of the interface dipole depends significantly on the adsorbed ligand molecules. The present study paves the way towards the engineering of the electronic properties of the nanoparticle surface, which is of utmost importance for the application of plasmonic nanoparticles in the fields of heterogeneous catalysis and solar energy conversion.
Ionic liquids are well known for their high gas absorption capacity. It is shown that this is not a solvent constant, but can be enhanced by another factor of 10 by pore confinement, here of the ionic liquid (IL) 1-ethyl-3-methylimidazolium acetate (EmimOAc) in the pores of carbon materials. A matrix of four different carbon compounds with micro- and mesopores as well as with and without nitrogen doping is utilized to investigate the influence of the carbons structure on the nitrogen uptake in the pore-confined EmimOAc. In general, the absorption is most improved for IL in micropores and in nitrogen-doped carbon. This effect is so large that it is already seen in TGA and DSC experiments. Due to the low vapor pressure of the IL, standard volumetric sorption experiments can be used to quantify details of this effect. It is reasoned that it is the change of the molecular arrangement of the ions in the restricted space of the pores that creates additional free volume to host molecular nitrogen.
Spherical particles from shape-memory polymers (SMP) can be stretched to ellipsoids with high aspect ratio (AR) and temporarily stabilized. They can switch back to low AR upon thermal stimulation. Here, the creation of an alternative shape-switching capability of particles from low to high AR is introduced, where a SMP matrix from polyvinyl alcohol (PVA) is used to create crosslinked high AR particles and to program the embedded micrometer-sized particles from a second SMP (oligo(epsilon-caprolactone) micronetworks, MN) with a low switching temperature T-sw. This programming proceeds through shape-recovery of the PVA matrix, from which the MN are harvested by PVA matrix dissolution. The use of a dissolvable SMP matrix may be a general strategy to efficiently create systems with complex moving capabilities.
Insufficient endothelialization of cardiovascular grafts is a major hurdle in vascular surgery and regenerative medicine, bearing a risk for early graft thrombosis. Neither of the numerous strategies pursued to solve these problems were conclusive. Endothelialization is regulated by the endothelial basement membrane (EBM), a highly specialized part of the vascular extracellular matrix. Thus, a detailed understanding of the structure-function interrelations of the EBM components is fundamental for designing biomimetic materials aiming to mimic EBM functions. In this review, a detailed description of the structure and functions of the EBM are provided, including the luminal and abluminal interactions with adjacent cell types, such as vascular smooth muscle cells. Moreover, in vivo as well as in vitro strategies to build or renew EBM are summarized and critically discussed. The spectrum of methods includes vessel decellularization and implant biofunctionalization strategies as well as tissue engineering-based approaches and bioprinting. Finally, the limitations of these methods are highlighted, and future directions are suggested to help improve future design strategies for EBM-inspired materials in the cardiovascular field.
The LArge-scale Reservoir Simulator (LARS) has been previously developed to study hydrate dissociation in hydrate-bearing systems under in-situ conditions. In the present study, a numerical framework of equations of state describing hydrate formation at equilibrium conditions has been elaborated and integrated with a numerical flow and transport simulator to investigate a multi-stage hydrate formation experiment undertaken in LARS. A verification of the implemented modeling framework has been carried out by benchmarking it against another established numerical code. Three-dimensional (3D) model calibration has been performed based on laboratory data available from temperature sensors, fluid sampling, and electrical resistivity tomography. The simulation results demonstrate that temperature profiles, spatial hydrate distribution, and bulk hydrate saturation are consistent with the observations. Furthermore, our numerical framework can be applied to calibrate geophysical measurements, optimize post-processing workflows for monitoring data, improve the design of hydrate formation experiments, and investigate the temporal evolution of sub-permafrost methane hydrate reservoirs.
Using hot charge carriers far from a plasmonic nanoparticle surface is very attractive for many applications in catalysis and nanomedicine and will lead to a better understanding of plasmon-induced processes, such as hot-charge-carrier- or heat-driven chemical reactions. Herein we show that DNA is able to transfer hot electrons generated by a silver nanoparticle over several nanometers to drive a chemical reaction in a molecule nonadsorbed on the surface. For this we use 8-bromo-adenosine introduced in different positions within a double-stranded DNA oligonucleotide. The DNA is also used to assemble the nanoparticles into nanoparticles ensembles enabling the use of surface-enhanced Raman scattering to track the decomposition reaction. To prove the DNA-mediated transfer, the probe molecule was insulated from the source of charge carriers, which hindered the reaction. The results indicate that DNA can be used to study the transfer of hot electrons and the mechanisms of advanced plasmonic catalysts.
There is an ongoing interest in O-1(2) sensitizers, whose activity is selectively controlled by their interaction with DNA. To this end, we synthesized three isomeric pyridinium alkynylanthracenes 2 o-p and a water-soluble trapping reagent for O-1(2). In water and in the absence of DNA, these dyes show a poor efficiency to sensitize the photooxygenation of the trapping reagent as they decompose due to electron transfer processes. In contrast, in the presence of DNA O-1(2) is generated from the excited DNA-bound ligand. The interactions of 2 o-p with DNA were investigated by thermal DNA melting studies, UV/vis and fluorescence spectroscopy, and linear and circular dichroism spectroscopy. Our studies revealed an intercalative binding with an orientation of the long pyridyl-alkynyl axis parallel to the main axis of the DNA base pairs. In the presence of poly(dA : dT), all three isomers show an enhanced formation of singlet oxygen, as indicated by the reaction of the latter with the trapping reagent. With green light irradiation of isomer 2 o in poly(dA : dT), the conversion rate of the trapping reagent is enhanced by a factor >10. The formation of O-1(2) was confirmed by control experiments under anaerobic conditions, in deuterated solvents, or by addition of O-1(2) quenchers. When bound to poly(dG : dC), the opposite effect was observed only for isomers 2 o and 2 m, namely the trapping reagent reacted significantly slower. Overall, we showed that pyridinium alkynylanthracenes are very useful intercalators, that exhibit an enhanced photochemical O-1(2) generation in the DNA-bound state.
We study the underdamped motion of a passive particle in an active environment. Using the phase space path integral method we find the probability distribution function of position and velocity for a free and a harmonically bound particle. The environment is characterized by an active noise which is described as the Ornstein-Uhlenbeck process (OUP). Taking two similar, yet slightly different OUP models, it is shown how inertia along with other relevant parameters affect the dynamics of the particle. Further we investigate the work fluctuations of a harmonically trapped particle by considering the trap center being pulled at a constant speed. Finally, the fluctuation theorem of work is validated with an effective temperature in the steady-state limit.
Li-S battery has been considered as the next-generation energy storage device, which still suffers from the shuttle effect of lithium polysulfides (LiPSs). In this work, mesoporous hollow carbon-coated MnO nanospheres (C@MnO) have been designed and synthesized using spherical polyelectrolyte brushes (SPB) as template, KMnO4 as MnO precursor, and polydopamine as carbon source to improve the electrochemical performance of Li-S battery. The hollow C@MnO nanospheres enable the combination of physical confinement and chemical adsorption of the LiPSs. The thin carbon coating layer can provide good electrical conductivity and additional physical confinement to polysulfides. Moreover, the encapsulated MnO inside the carbon shell exhibits strong chemical adsorption to polysulfides. The constructed C@MnO/S cathode shows the discharge capacity of 1026 mAh g(-1) at 0.1 C with 79% capacity retention after 80 cycles. The synthesized hollow C@MnO nanoparticles can work as highly efficient sulfur host materials, providing an effective solution to suppress the shuttle effect in Li-S battery.
Vibrational dynamics of adsorbates near surfaces plays both an important role for applied surface science and as a model lab for studying fundamental problems of open quantum systems. We employ a previously developed model for the relaxation of a D-Si-Si bending mode at a D:Si(100)-(2 x 1) surface, induced by a "bath " of more than 2000 phonon modes [Lorenz and P. Saalfrank, Chem. Phys. 482, 69 (2017)], to extend previous work along various directions. First, we use a Hierarchical Effective Mode (HEM) model [Fischer et al., J. Chem. Phys. 153, 064704 (2020)] to study relaxation of higher excited vibrational states than hitherto done by solving a high-dimensional system-bath time-dependent Schrodinger equation (TDSE). In the HEM approach, (many) real bath modes are replaced by (much less) effective bath modes. Accordingly, we are able to examine scaling laws for vibrational relaxation lifetimes for a realistic surface science problem. Second, we compare the performance of the multilayer multiconfigurational time-dependent Hartree (ML-MCTDH) approach with that of the recently developed coherent-state-based multi-Davydov-D2 Ansatz [Zhou et al., J. Chem. Phys. 143, 014113 (2015)]. Both approaches work well, with some computational advantages for the latter in the presented context. Third, we apply open-system density matrix theory in comparison with basically "exact " solutions of the multi-mode TDSEs. Specifically, we use an open-system Liouville-von Neumann (LvN) equation treating vibration-phonon coupling as Markovian dissipation in Lindblad form to quantify effects beyond the Born-Markov approximation. Published under an exclusive license by AIP Publishing.
Microwave-Assisted Synthesis of 5 '-O-methacryloylcytidine Using the Immobilized Lipase Novozym 435
(2022)
Nucleobase building blocks have been demonstrated to be strong candidates when it comes to DNA/RNA-like materials by benefiting from hydrogen bond interactions as physical properties. Modifying at the 5 ' position is the simplest way to develop nucleobase-based structures by transesterification using the lipase Novozym 435. Herein, we describe the optimization of the lipase-catalyzed synthesis of the monomer 5 '-O-methacryloylcytidine with the assistance of microwave irradiation. Variable reaction parameters, such as enzyme concentration, molar ratio of the substrate, reaction temperature and reaction time, were investigated to find the optimum reaction condition in terms of obtaining the highest yield.
Enzymes can support the synthesis or degradation of biomacromolecules in natural processes. Here, we demonstrate that enzymes can induce a macroscopic-directed movement of microstructured hydrogels following a mechanism that we call a "Jack-in-the-box" effect. The material's design is based on the formation of internal stresses induced by a deformation load on an architectured microscale, which are kinetically frozen by the generation of polyester locking domains, similar to a Jack-in-thebox toy (i.e., a compressed spring stabilized by a closed box lid). To induce the controlled macroscopic movement, the locking domains are equipped with enzyme-specific cleavable bonds (i.e., a box with a lock and key system). As a result of enzymatic reaction, a transformed shape is achieved by the release of internal stresses. There is an increase in entropy in combination with a swelling-supported stretching of polymer chains within the microarchitectured hydrogel (i.e., the encased clown pops-up with a pre-stressed movement when the box is unlocked). This utilization of an enzyme as a physiological stimulus may offer new approaches to create interactive and enzyme-specific materials for different applications such as an optical indicator of the enzyme's presence or actuators and sensors in biotechnology and in fermentation processes.
Lanthanide based ceria nanomaterials are important practical materials due to their redox properties that are useful in technology and life sciences. This PhD thesis examined various properties and potential for catalytic and bio-applications of Ln3+-doped ceria nanomaterials. Ce1-xGdxO2-y: Eu3+, gadolinium doped ceria (GDC) (0 ≤ x ≤ 0.4) nanoparticles were synthesized by flame spray pyrolysis (FSP) and studied, followed by 15 % CexZr1-xO2-y: Eu3+|YSZ (0 ≤ x ≤ 1) nanocomposites. Furthermore, Ce1-xYb xO2-y (0.004 ≤ x ≤ 0.22) nanoparticles were synthesized by thermal decomposition and characterized. Finally, CeO2-y: Eu3+ nanoparticles were synthesized by a microemulsion method, biofunctionalized and characterized. The studies undertaken presents a novel approach to structurally elucidate ceria-based nanomaterials by way of Eu3+ and Yb3+ spectroscopy and processing the spectroscopic data with the multi-way decomposition method PARAFAC. Data sets of the three variables: excitation wavelength, emission wavelength and time were used to perform the deconvolution of spectra.
GDC nanoparticles from FSP are nano-sized and of roughly cubic shape and crystal structure (Fm3̅m). Raman data revealed four vibrational modes exhibited by Gd3+ containing samples whereas CeO2-y: Eu3+ displays only two. The room temperature, time-resolved emission spectra recorded at λexcitation = 464 nm show that Gd3+ doping results in significantly altered emission spectra compared to pure ceria. The PARAFAC analysis for the pure ceria samples reveals two species; a high-symmetry species and a low-symmetry species. The GDC samples yield two low-symmetry spectra in the same experiment. High-resolution emission spectra recorded at 4 K after probing the 5D0-7F0 transition revealed additional variation in the low symmetry Eu3+ sites in pure ceria and GDC. The data of the Gd3+-containing samples indicates that the average charge density around the Eu3+ ions in the lattice is inversely related to Gd3+ and oxygen vacancy concentration.
The particle crystallites of the 773 K and 1273 K annealed Yb3+ -ceria nanostructure materials are nano-sized and have a cubic fluorite structure with four Raman vibrational modes. Elemental maps clearly show that cluster formation occurs for 773 K annealed with high Yb3+ ion concentration from 15 mol % in the ceria lattice. These clusters are destroyed with annealing to 1273 K. The emission spectra observed from room temperature and 4 K measurements for the Ce1-xYb xO2-y samples have a manifold that corresponds to the 2F5/2-2F7/2 transition of Yb3+ ions. Some small shifts are observed in the Stark splitting pattern and are induced by the variations of the crystal field influenced by where the Yb3+ ions are located in the crystal lattices in the samples. Upon mixing ceria with high Yb3+ concentrations, the 2F5/2-2F7/2 transition is also observed in the Stark splitting pattern, but the spectra consist of two broad high background dominated peaks. Annealing the nanomaterials at 1273 K for 2 h changes the spectral signature as new peaks emerge. The deconvolution yielded luminescence decay kinetics as well as the accompanying luminescence spectra of three species for each of the low Yb3+ doped ceria samples annealed at 773 K and one species for the 1273 K annealed samples. However, the ceria samples with high Yb3+ concentration annealed at the two temperatures yielded one species with lower decay times as compared to the Yb3+ doped ceria samples after PARAFAC analysis.
Through the calcination of the nanocomposites at two high temperatures, the evolution of the emission patterns from specific Eu3+ lattice sites to indicate structural changes for the nanocomposites was followed. The spectroscopy results effectively complemented the data obtained from the conventional techniques. Annealing the samples at 773 K, resulted in amorphous, unordered domains whereas the TLS of the 1273 K nanocomposites reveal two distinct sites, with most red shifted Eu3+ species coming from pure Eu3+ doped ZrO2 on the YSZ support.
Finally, for Eu3+ doped ceria, successful transfer from hydrophobic to water phase and subsequent biocompatibility was achieved using ssDNA. PARAFAC analysis for the Eu3+ in nanoparticles dispersed in toluene and water revealed one Eu3+ species, with slightly differing surface properties for the nanoparticles as far as the luminescence kinetics and solvent environments were concerned. Several functionalized nanoparticles conjugated onto origami triangles after hybridization were visualized by atomic force microscopy (AFM). Putting all into consideration, Eu3+ and Yb3+ spectroscopy was used to monitor the structural changes and determining the feasibility of the nanoparticle transfer into water. PARAFAC proves to be a powerful tool to analyze lanthanide spectra in crystalline solid materials and in solutions, which are characterized by numerous Stark transitions and where measurements usually yield a superposition of different emission contributions to any given spectrum.
Hydrogel forming physical networks based on gelatin are an attractive approach toward multifunctional biomaterials with the option of reshaping, self-healing, and stimuli-sensitivity. However, it is challenging to design such gelatin-based hydrogels to be stable at body temperature. Here, gelatin functionalized with desaminotyrosine (DAT) or desaminotyrosyl tyrosine (DATT) side chains is crosslinked with cyclodextrin (CD) dimers under formation of inclusions complexes. The supramolecular networks displayed at room temperature decreased water uptake (200-600 wt% for DAT-based systems, 200 wt% for DATT based systems), and increased storage moduli up to 25.6 kPa determined by rheology compared to DAT(T) gelatin. The gel-sol transition temperature increased from 33 up to 42 degrees C. The presented system that is completely based on natural building blocks may form the basis for materials that may potentially respond by dissolution or changes of properties to changes in environmental conditions or to the presence of CD guest molecules.
Fifteen N-butylpyridinium salts - five monometallic [C4Py](2)[MBr4] and ten bimetallic [C4Py](2)[(M0.5M0.5Br4)-M-a-Br-b] (M=Co, Cu, Mn, Ni, Zn) - were synthesized, and their structures and thermal and electrochemical properties were studied. All the compounds are ionic liquids (ILs) with melting points between 64 and 101 degrees C. Powder and single-crystal X-ray diffraction show that all ILs are isostructural. The electrochemical stability windows of the ILs are between 2 and 3 V. The conductivities at room temperature are between 10(-5) and 10(-6) S cm(-1). At elevated temperatures, the conductivities reach up to 10(-4) S cm(-1) at 70 degrees C. The structures and properties of the current bromide-based ILs were also compared with those of previous examples using chloride ligands, which illustrated differences and similarities between the two groups of ILs.
A simple experimental setup for temperature dependent mass spectrometric measurements has been constructed. It consists of a heated sample chamber and a mass spectrometer and allows for measurements under inert gas and ambient air. Based on initial measurements on two extruded polystyrene (XPS) samples a methodology for the data analysis has been developed. With this methodology the outgassing temperature of volatile compounds, which were used as blowing agents, has been identified. Furthermore, the composition of the blowing agents has been analyzed by temperature dependent mass spectra. The results indicate the use of ambient air in one material and a mixture of the banned blowing agents R142b and R22, both hydrochlorofluorocarbons (HCFC), in the other material. The here described methodology provides an easy to use approach to identify such compounds, for example as part of environmental or quality control.
A multi-component particle system was developed that combines the properties of white color, white light emission and strong magnetism on the macroscopic and microscopic scale. The system is constituted by combination of an inorganic white core with either hard or soft magnetic properties and a white light emitting MOF. The key towards this achievement is the supraparticulate character constituted by a magnetic core, of either magnetite or alpha-Fe, surrounded by titania and silica nanoparticles of a certain size in a loose structural shell-arrangement as white components and finally the white light emitting metal-organic framework (MOF) EuTb@IFP-1 as building blocks of a core-shell structure. The supraparticles are created by forced assembly of the inorganic compounds and by combining spray-drying and postsynthetic modification by solvothermal chemistry. Thereby, the gap is bridged that homogenous compounds are either strongly magnetic, white in appearance or white light emitting. The composites presented herein inherit these properties intrinsically as electronic properties. The white characteristics are based on all optical properties that enable white: light reflection, refraction, and light emission. This work shifts the paradigm that strong magnetic materials are always expected to be intrinsically dark.
The present work focuses on the preparation and characterisation of various nanoplastic reference material candidates. Nanoplastics are plastic particles in a size range of 1 − 1000 nm. The term has emerged in recent years as a distinction from the larger microplastic (1 − 1000 μm). Since the properties of the two plastic particles differ significantly due to their size, it is important to have nanoplastic reference material. This was produced for the polymer types polypropylene (PP) and polyethylene (PE) as well as poly(lactic acid) (PLA).
A top-down method was used to produce the nanoplastic for the polyolefins PP and PE (Section 3.1). The material was crushed in acetone using an Ultra-Turrax disperser and then transferred to water. This process produces reproducible results when repeated, making it suitable for the production of a reference material candidate. The resulting dispersions were investigated using dynamic and electrophoretic light scattering. The dispersion of PP particles gave a mean hydrodynamic diameter Dh = 180.5±5.8 nm with a PDI = 0.08±0.02 and a zeta potential ζ = −43.0 ± 2.0 mV. For the PE particles, a diameter Dh = 344.5 ± 34.6 nm, with a PDI = 0.39 ± 0.04 and a zeta potential of ζ = −40.0 ± 4.2 mV was measured. This means that both dispersions are nanoplastics, as the particles are < 1000 nm. Furthermore, the starting material of these polyolefin particles was mixed with a gold salt and thereby the nanoplastic production was repeated in order to obtain nanoplastic particles doped with gold, which should simplify the detection of the particles.
In addition to the top-down approach, a bottom-up method was chosen for the PLA (Section 3.2). Here, the polymer was first dissolved in THF and stabilised with a surfactant. Then water was added and THF evaporated, leaving an aqueous PLA dispersion. This experiment was also investigated using dynamic light scattering and, when repeated, yielded reproducible results, i. e. an average hydrodynamic diameter of Dh = 89.2 ± 3.0 nm. Since the mass concentration of PLA in the dispersion is known due to the production method, a Python notebook was tested for these samples to calculate the number and mass concentration of nano(plastic) particles using the MALS results. Similar to the plastic produced in Section 3.1, gold was also incorporated into the particle, which was achieved by adding a dispersion of gold clusters with a diameter of D = 1.15 nm in an ionic liquid (IL) in the production process. Here, the preparation of the gold clusters in the ionic liquid 1-ethyl-3-methylimidazolium dicyanamide ([Emim][DCA]) represented the first use of an IL both as a reducing agent for gold and as a solvent for the gold clusters. Two volumes of gold cluster dispersion were added during the PLA particle synthesis. The addition of the gold clusters leads to much larger particles. The nanoPLA with 0.8% Au has a diameter of Dh = 198.0 ± 10.8 nm and the nanoPLA with 4.9% Au has a diameter of Dh = 259.1 ± 23.7 nm. First investigations by TEM imaging show that the nanoPLA particles form hollow spheres when gold clusters are added. However, the mechanism leading to these structures remains unclear.
By adding hyaluronic acid (HA) to dioctyl sodium sulfosuccinate (AOT)-stabilized gold nanotriangles (AuNTs) with an average thickness of 7.5 +/- 1 nm and an edge length of about 175 +/- 17 nm, the AOT bilayer is replaced by a polymeric HA-layer leading to biocompatible nanoplatelets. The subsequent reduction process of tetrachloroauric acid in the HA-shell surrounding the AuNTs leads to the formation of spherical gold nanoparticles on the platelet surface. With increasing tetrachloroauric acid concentration, the decoration with gold nanoparticles can be tuned. SAXS measurements reveal an increase of the platelet thickness up to around 14.5 nm, twice the initial value of bare AuNTs. HRTEM micrographs show welding phenomena between densely packed particles on the platelet surface, leading to a crumble formation while preserving the original crystal structure. Crumbles crystallized on top of the platelets enhance the Raman signal by a factor of around 20, and intensify the plasmon-driven dimerization of 4-nitrothiophenol (4-NTP) to 4,4 '-dimercaptoazobenzene in a yield of up to 50 %. The resulting crumbled nanotriangles, with a biopolymer shell and the absorption maximum in the second window for in vivo imaging, are promising candidates for biomedical sensing.
Zanthoxylum leprieurii Guill. and Perr. (Rutaceae) stem bark is used locally in Uganda for treating tuberculosis (TB) and cough-related infections. Lupeol (1), sesamin (2), trans-fagaramide (3), arnottianamide (4), (S)-marmesinin (5), and hesperidin (6) were isolated from the chloroform/methanol (1:1) extract of Z. leprieurii stem bark. Their structures were elucidated using spectroscopic techniques and by comparison with literature data. Furthermore, the extract and isolated compounds were subjected to antimycobacterial activity. The extract exhibited moderate activity against the susceptible (H(37)Rv) TB strain, but weak activity against the multidrug resistant (MDR)-TB strain with minimum inhibitory concentrations (MICs) of 586.0 and 1172.0 mu g/mL, respectively. Compound 3 (trans-fagaramide) showed significant antimycobacterial activity against the susceptible (H(37)Rv) TB strain (MIC 6 mu g/mL), but moderate activity against the MDR-TB strain (MIC 12.2 mu g/mL). Compounds 2, 5, 6, and 1 showed moderate activities against the susceptible (H(37)Rv) strain (MIC 12.2-98.0 mu g/mL) and moderate to weak activities against the MDR-TB strain (MIC 24.4-195.0 mu g/mL). This study reports for the first time the isolation of compounds 1 to 6 from the stem bark of Z leprieurii. trans-Fagaramide (3) may present a vital template in pursuit of novel and highly effective TB drugs.
Objective Due to multiple light scattering that occurs inside and between cells, quantitative optical spectroscopy in turbid biological suspensions is still a major challenge. This includes also optical inline determination of biomass in bioprocessing. Photon Density Wave (PDW) spectroscopy, a technique based on multiple light scattering, enables the independent and absolute determination of optical key parameters of concentrated cell suspensions, which allow to determine biomass during cultivation. Results A unique reactor type, called "mesh ultra-thin layer photobioreactor" was used to create a highly concentrated algal suspension. PDW spectroscopy measurements were carried out continuously in the reactor without any need of sampling or sample preparation, over 3 weeks, and with 10-min time resolution. Conventional dry matter content and coulter counter measurements have been employed as established offline reference analysis. The PBR allowed peak cell dry weight (CDW) of 33.4 g L-1. It is shown that the reduced scattering coefficient determined by PDW spectroscopy is strongly correlated with the biomass concentration in suspension and is thus suitable for process understanding. The reactor in combination with the fiber-optical measurement approach will lead to a better process management.
Surface-enhanced Raman scattering (SERS) is an effective and widely used technique to study chemical reactions induced or catalyzed by plasmonic substrates, since the experimental setup allows us to trigger and track the reaction simultaneously and identify the products. However, on substrates with plasmonic hotspots, the total signal mainly originates from these nanoscopic volumes with high reactivity and the information about the overall consumption remains obscure in SERS measurements. This has important implications; for example, the apparent reaction order in SERS measurements does not correlate with the real reaction order, whereas the apparent reaction rates are proportional to the real reaction rates as demonstrated by finite-difference time-domain (FDTD) simulations. We determined the electric field enhancement distribution of a gold nanoparticle (AuNP) monolayer and calculated the SERS intensities in light-driven reactions in an adsorbed self-assembled molecular monolayer on the AuNP surface. Accordingly, even if a high conversion is observed in SERS due to the high reactivity in the hotspots, most of the adsorbed molecules on the AuNP surface remain unreacted. The theoretical findings are compared with the hot-electron-induced dehalogenation of 4-bromothiophenol, indicating a time dependency of the hot-carrier concentration in plasmon-mediated reactions. To fit the kinetics of plasmon-mediated reactions in plasmonic hotspots, fractal-like kinetics are well suited to account for the inhomogeneity of reactive sites on the substrates, whereas also modified standard kinetics model allows equally well fits. The outcomes of this study are on the one hand essential to derive a mechanistic understanding of reactions on plasmonic substrates by SERS measurements and on the other hand to drive plasmonic reactions with high local precision and facilitate the engineering of chemistry on a nanoscale.
The base pairing property and the "melting" behavior of oligonucleotides can take advantage to develop new smart thermoresponsive and programmable materials. Complementary cytidine- (C) and guanosine- (G) based monomers were blockcopolymerized using RAFT polymerization technique with poly-(N-(2-hydroxypropyl) methacrylamide) (pHPMA) as the hydrophilic macro chain transfer agent (macro-CTA). C-C, G-G and C-G hydrogen bond interactions of blockcopolymers with respectively C and G moieties have been investigated using SEM, DLS and UV-Vis. Mixing and heating both complementary copolymers resulted in reforming new aggregates. Due to the ribose moiety of the isolated nucleoside-bearing blockcopolymers, the polarity is increased for better solubility. Self-assembly investigations of these bioinspired compounds are the crucial basis for the development of potential future drug delivery systems.
The compound [Nb6Cl14(pyrazine)(4)]center dot 2CH(2)Cl(2) (1) was investigated for its suitability as a starting compound for new ligand-supported hexanuclear niobium cluster compounds. The synthesis, stability to air and increased temperature, solubility and usability for subsequent reactions of 1, and purification and separation of the reaction products are discussed. The compounds with cluster units [Nb6Cl14L4], where L = iso-quinoline N-oxides (2), 1,1-dimethylethylenediamines (3), or thiazoles (4), and [Nb6Cl14(PEt3)(3.76)(Et3PO)(0.24)]-[Nb6Cl14(MeCN)(4)]center dot 4MeCN (5) are presented as follow-up products. The crystal structures of compounds 1-5 are analyzed, and the structures are discussed with respect to their intraand intermolecular bonding situations and crystal packing. In addition to hydrogen bonds and pi-pi interactions, the appearance of chalcogen and halogen bonds and lone pair-pi interactions between Nb-6 cluster units was observed for the first time.
Molecular excitons play a central role in processes of solar energy conversion, both natural and artificial. It is therefore no wonder that numerous experimental and theoretical investigations in the last decade, employing state-of-the-art spectroscopic techniques and computational methods, have been driven by the common aim to unravel exciton dynamics in multichromophoric systems. Theoretically, exciton (de)localization and transfer dynamics are most often modelled using either mixed quantum-classical approaches (e.g., trajectory surface hopping) or fully quantum mechanical treatments (either using model diabatic Hamiltonians or direct dynamics). Yet, the terms such as "exciton localization" or "exciton transfer" may bear different meanings in different works depending on the method in use (quantum-classical vs. fully quantum). Here, we relate different views on exciton (de)localization. For this purpose, we perform molecular surface hopping simulations on several tetracene dimers differing by a magnitude of exciton coupling and carry out quantum dynamical as well as surface hopping calculations on a relevant model system. The molecular surface hopping simulations are done using efficient long-range corrected time-dependent density functional tight binding electronic structure method, allowing us to gain insight into different regimes of exciton dynamics in the studied systems.
It has been experimentally demonstrated that reaction rates for molecules embedded in microfluidic optical cavities are altered when compared to rates observed under "ordinary" reaction conditions. However, precise mechanisms of how strong coupling of an optical cavity mode to molecular vibrations affects the reactivity and how resonance behavior emerges are still under dispute. In the present work, we approach these mechanistic issues from the perspective of a thermal model reaction, the inversion of ammonia along the umbrella mode, in the presence of a single-cavity mode of varying frequency and coupling strength. A topological analysis of the related cavity Born-Oppenheimer potential energy surface in combination with quantum mechanical and transition state theory rate calculations reveals two quantum effects, leading to decelerated reaction rates in qualitative agreement with experiments: the stiffening of quantized modes perpendicular to the reaction path at the transition state, which reduces the number of thermally accessible reaction channels, and the broadening of the barrier region, which attenuates tunneling. We find these two effects to be very robust in a fluctuating environment, causing statistical variations of potential parameters, such as the barrier height. Furthermore, by solving the time-dependent Schrodinger equation in the vibrational strong coupling regime, we identify a resonance behavior, in qualitative agreement with experimental and earlier theoretical work. The latter manifests as reduced reaction probability when the cavity frequency omega(c) is tuned resonant to a molecular reactant frequency. We find this effect to be based on the dynamical localization of the vibro-polaritonic wavepacket in the reactant well.
A cationic surfactant containing a spiropyrane unit is prepared exhibiting a dual-responsive adjustability of its surface-active characteristics. The switching mechanism of the system relies on the reversible conversion of the non-ionic spiropyrane (SP) to a zwitterionic merocyanine (MC) and can be controlled by adjusting the pH value and via light, resulting in a pH-dependent photoactivity: While the compound possesses a pronounced difference in surface activity between both forms under acidic conditions, this behavior is suppressed at a neutral pH level. The underlying switching processes are investigated in detail, and a thermodynamic explanation based on a combination of theoretical and experimental results is provided. This complex stimuli-responsive behavior enables remote-control of colloidal systems. To demonstrate its applicability, the surfactant is utilized for the pH-dependent manipulation of oil-in-water emulsions.