40045
2017
2017
eng
17
postprint
1
--
2017-09-21
--
Water-soluble cellulose derivatives are sustainable additives for biomimetic calcium phosphate mineralization
The effect of cellulose-based polyelectrolytes on biomimetic calcium phosphate mineralization is described. Three cellulose derivatives, a polyanion, a polycation, and a polyzwitterion were used as additives. Scanning electron microscopy, X-ray diffraction, IR and Raman spectroscopy show that, depending on the composition of the starting solution, hydroxyapatite or brushite precipitates form. Infrared and Raman spectroscopy also show that significant amounts of nitrate ions are incorporated in the precipitates. Energy dispersive X-ray spectroscopy shows that the Ca/P ratio varies throughout the samples and resembles that of other bioinspired calcium phosphate hybrid materials. Elemental analysis shows that the carbon (i.e., polymer) contents reach 10% in some samples, clearly illustrating the formation of a true hybrid material. Overall, the data indicate that a higher polymer concentration in the reaction mixture favors the formation of polymer-enriched materials, while lower polymer concentrations or high precursor concentrations favor the formation of products that are closely related to the control samples precipitated in the absence of polymer. The results thus highlight the potential of (water-soluble) cellulose derivatives for the synthesis and design of bioinspired and bio-based hybrid materials.
urn:nbn:de:kobv:517-opus4-400453
online registration
Inorganics 4 (2016) Nr. 4. - DOI: 10.3390/inorganics4040033
33
CC-BY - Namensnennung 4.0 International
Andreas Taubert
Christian Balischewski
Doreen Hentrich
Thomas Elschner
Sascha Eidner
Christina Günter
Karsten Behrens
Thomas Heinze
Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe
354
eng
uncontrolled
cellulose
eng
uncontrolled
polyamine
eng
uncontrolled
polyammonium salt
eng
uncontrolled
polycarboxylate
eng
uncontrolled
polyzwitterion
eng
uncontrolled
calcium phosphate
eng
uncontrolled
biomineralization
eng
uncontrolled
brushite
eng
uncontrolled
hydroyxapatite
eng
uncontrolled
biomaterial
Chemie und zugeordnete Wissenschaften
open_access
Institut für Chemie
Referiert
Open Access
Multidisciplinary Digital Publishing Institute (MDPI)
Universität Potsdam
https://publishup.uni-potsdam.de/files/40045/pmnr354_online.pdf
9501
2013
2013
eng
1019
1030
postprint
1
--
2013-11-29
--
Tetrahalidocuprates(II) – structure and EPR spectroscopy
We present and discuss the results of crystallographic and electron paramagnetic resonance (EPR) spectroscopic analyses of five tetrachloridocuprate(II) complexes to supply a useful tool for the structural characterisation of the [CuCl4]2− moiety in the liquid state, for example in ionic liquids, or in solution. Bis(benzyltriethylammonium)-, bis(trimethylphenylammonium)-, bis(ethyltriphenylphosphonium)-, bis(benzyltriphenylphosphonium)-, and bis(tetraphenylarsonium)tetrachloridocuprate(II) were synthesised and characterised by elemental, IR, EPR and X-ray analyses. The results of the crystallographic analyses show distorted tetrahedral coordination geometry of all [CuCl4]2− anions in the five complexes and prove that all investigated complexes are stabilised by hydrogen bonds of different intensities. Despite the use of sterically demanding ammonium, phosphonium and arsonium cations to obtain the separation of the paramagnetic Cu(II) centres for EPR spectroscopy no hyperfine structure was observed in the EPR spectra but the principal values of the electron Zeeman tensor, g∥ and g⊥, could be determined. With these EPR data and the crystallographic parameters we were able to carry out a correlation study to anticipate the structural situation of tetrachloridocuprates in different physical states. This correlation is in good agreement with DFT calculations.
Part 2: tetrachloridocuprates(II)
urn:nbn:de:kobv:517-opus4-95012
online registration
New J. Chem. (2014) Nr. 38, S. 1019-1030. - DOI: 10.1039/C3NJ01039B
Keine öffentliche Lizenz: Unter Urheberrechtsschutz
Alette Winter
Kerstin Thiel
André Zabel
Tillmann Klamroth
Andreas Pöppl
Alexandra Kelling
Uwe Schilde
Andreas Taubert
Peter Strauch
Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe
240
eng
uncontrolled
electron-spin resonance
eng
uncontrolled
liquid-crystal precursors
eng
uncontrolled
copper(II) halide salts
eng
uncontrolled
ionic liquid
eng
uncontrolled
square planar
eng
uncontrolled
tetrachlorocuprate(II) salts
eng
uncontrolled
molecular-structure
eng
uncontrolled
magnetic-properties
eng
uncontrolled
paramagnetic-resonance
eng
uncontrolled
temperature phase
Chemie und zugeordnete Wissenschaften
open_access
Institut für Chemie
Referiert
Open Access
Universität Potsdam
https://publishup.uni-potsdam.de/files/9501/pmnr240_online.pdf
52508
2020
2020
eng
18
8
postprint
1
2020-07-30
2020-06-19
--
Surface etching of 3D printed poly(lactic acid) with NaOH: a systematic approach
The article describes a systematic investigation of the effects of an aqueous NaOH treatment of 3D printed poly(lactic acid) (PLA) scaffolds for surface activation. The PLA surface undergoes several morphology changes and after an initial surface roughening, the surface becomes smoother again before the material dissolves. Erosion rates and surface morphologies can be controlled by the treatment. At the same time, the bulk mechanical properties of the treated materials remain unaltered. This indicates that NaOH treatment of 3D printed PLA scaffolds is a simple, yet viable strategy for surface activation without compromising the mechanical stability of PLA scaffolds.
Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe
10.25932/publishup-52508
urn:nbn:de:kobv:517-opus4-525088
1866-8372
<a href="http://publishup.uni-potsdam.de/52733">Bibliographieeintrag der Originalveröffentlichung/Quelle</a>
1711
Version of record
Polymers 2020, 12(8), 1711; https://doi.org/10.3390/polym12081711
true
true
CC-BY - Namensnennung 4.0 International
Matthias Schneider
Nora Fritzsche
Agnieszka Puciul-Malinowska
Andrzej Balis
Amr Mostafa
Ilko Bald
Szczepan Zapotoczny
Andreas Taubert
Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe
1212
eng
uncontrolled
surface modification
eng
uncontrolled
sodium hydroxide etching
eng
uncontrolled
poly(lactic acid)
eng
uncontrolled
3D printing
eng
uncontrolled
roughness
eng
uncontrolled
wettability
eng
uncontrolled
erosion
Chemie und zugeordnete Wissenschaften
open_access
Institut für Chemie
Referiert
Green Open-Access
Universität Potsdam
https://publishup.uni-potsdam.de/files/52508/pmnr1212.pdf
48898
2021
2021
eng
13
1093
postprint
1
2021-01-13
2021-01-13
--
Sulfobetaine Cryogels for Preferential Adsorption of Methyl Orange from Mixed Dye Solutions
New cryogels for selective dye removal from aqueous solution were prepared by free radical polymerization from the highly water-soluble crosslinker N,N,N’,N’-tetramethyl-N,N’-bis(2-ethylmethacrylate)-propyl-1,3-diammonium dibromide and the sulfobetaine monomer 2-(N-3-sulfopropyl-N,N-dimethyl ammonium)ethyl methacrylate. The resulting white and opaque cryogels have micrometer sized pores with a smaller substructure. They adsorb methyl orange (MO) but not methylene blue (MB) from aqueous solution. Mixtures of MO and MB can be separated through selective adsorption of the MO to the cryogels while the MB remains in solution. The resulting cryogels are thus candidates for the removal of hazardous organic substances, as exemplified by MO and MB, from water. Clearly, it is possible that the cryogels are also potentially interesting for removal of other compounds such as pharmaceuticals or pesticides, but this must be investigated further.
Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe
10.25932/publishup-48898
urn:nbn:de:kobv:517-opus4-488987
1866-8372
<a href="http://publishup.uni-potsdam.de/48897">Bibliographieeintrag der Originalveröffentlichung/Quelle</a>
208
Polymers 13 (2021) 2, 208 DOI: 10.3390/polym13020208
true
true
CC-BY - Namensnennung 4.0 International
Ramona Ihlenburg
Anne-Catherine Lehnen
Joachim Koetz
Andreas Taubert
Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe
1093
eng
uncontrolled
cryogel
eng
uncontrolled
water treatment
eng
uncontrolled
dye removal
eng
uncontrolled
methyl orange
eng
uncontrolled
methylene blue
eng
uncontrolled
dye mixture
Chemie und zugeordnete Wissenschaften
open_access
Institut für Chemie
Referiert
Green Open-Access
Universität Potsdam
https://publishup.uni-potsdam.de/files/48898/pmnr1093.pdf
8139
2015
eng
postprint
1
2015-09-28
--
--
Renewable pyridinium ionic liquids from the continuous hydrothermal decarboxylation of furfural-amino acid derived pyridinium zwitterions
Fully renewable pyridinium ionic liquids were synthesised via the hydrothermal decarboxylation of pyridinium zwitterions derived from furfural and amino acids in flow. The functionality of the resulting ionic liquid (IL) can be tuned by choice of different amino acids as well as different natural carboxylic acids as the counterions. A representative member of this new class of ionic liquids was successfully used for the synthesis of ionogels and as a solvent for the Heck coupling.
urn:nbn:de:kobv:517-opus4-81390
online registration
Green Chem., 2015,17, 4151-4156 - DOI: 10.1039/C5GC00913H
<a href="http://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/8138">Bibliographieeintrag der Originalveröffentlichung/Quelle</a>
Sarah Kirchhecker
Steffen Tröger-Müller
Sebastian Bake
Markus Antonietti
Andreas Taubert
Davido Esposito
Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe
198
Chemie und zugeordnete Wissenschaften
Institut für Chemie
Referiert
Open Access
Universität Potsdam
https://publishup.uni-potsdam.de/files/8139/pmnr198.pdf
4659
2009
eng
postprint
0
2010-11-08
--
--
Polymer hydrogel/polybutadiene/iron oxide nanoparticle hybrid actuators for the characterization of NiTi implants
One of the main issues with the use of nickel titanium alloy (NiTi) implants in cardiovascular implants (stents) is that these devices must be of very high quality in order to avoid subsequent operations due to failing stents. For small stents with diameters below ca. 2 mm, however, stent characterization is not straightforward. One of the main problems is that there are virtually no methods to characterize the interior of the NiTi tubes used for fabrication of these tiny stents. The current paper reports on a robust hybrid actuator for the characterization of NiTi tubes prior to stent fabrication. The method is based on a polymer/hydrogel/magnetic nanoparticle hybrid material and allows for the determination of the inner diameter at virtually all places in the raw NiTi tubes. Knowledge of the inner structure of the raw NiTi tubes is crucial to avoid regions that are not hollow or regions that are likely to fail due to defects inside the raw tube. The actuator enables close contact of a magnetic polymer film with the inner NiTi tube surface. The magnetic signal can be detected from outside and be used for a direct mapping of the tube interior. As a result, it is possible to detect critical regions prior to expensive and slow stent fabrication processes.
urn:nbn:de:kobv:517-opus-48589
4858
Materials. - 2 (2009), 1, S. 207 - 220, DOI: 10.3390/ma2010207
<hr>The article was originally published by Molecular Diversity Preservation International:
<br><a href="http://www.mdpi.com/journal/materials">
Materials</a>. - 2 (2009), 1, S. 207-220<br>
ISSN 1996-1944<br>
DOI <a href="http://dx.doi.org/10.3390/ma2010207"> 10.3390/ma2010207</a>
Aleksandra Jeličić
Alwin Friedrich
Katarina Jeremić
Gerd Siekmeyer
Andreas Taubert
Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe
paper 161
eng
uncontrolled
NiTi
eng
uncontrolled
inner surface
eng
uncontrolled
hydrogel
eng
uncontrolled
polybutadiene
eng
uncontrolled
magnetic nanoparticles
Chemie und zugeordnete Wissenschaften
open_access
Institut für Chemie
Universität Potsdam
https://publishup.uni-potsdam.de/files/4659/pmnf161.pdf
8529
2015
2015
eng
postprint
1
--
2015-11-13
--
Poly(ethylene oxide)-based block copolymers with very high molecular weights for biomimetic calcium phosphate mineralization
The present article is among the first reports on the effects of poly(ampholyte)s and poly(betaine)s on the biomimetic formation of calcium phosphate. We have synthesized a series of di- and triblock copolymers based on a non-ionic poly(ethylene oxide) block and several charged methacrylate monomers, 2-(trimethylammonium)ethyl methacrylate chloride, 2-((3-cyanopropyl)-dimethylammonium)ethyl methacrylate chloride, 3-sulfopropyl methacrylate potassium salt, and [2-(methacryloyloxy)ethyl]dimethyl-(3-sulfopropyl)ammonium hydroxide. The resulting copolymers are either positively charged, ampholytic, or betaine block copolymers. All the polymers have very high molecular weights of over 106 g mol−1. All polymers are water-soluble and show a strong effect on the precipitation and dissolution of calcium phosphate. The strongest effects are observed with triblock copolymers based on a large poly(ethylene oxide) middle block (nominal Mn = 100 000 g mol−1). Surprisingly, the data show that there is a need for positive charges in the polymers to exert tight control over mineralization and dissolution, but that the exact position of the charge in the polymer is of minor importance for both calcium phosphate precipitation and dissolution.
urn:nbn:de:kobv:517-opus4-85299
online registration
Au 018921
RSC Advances (2015) Nr. 5, S. 103494-103505. - DOI: 10.1039/c5ra20035k
<a href="http://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/8528">Bibliographieeintrag der Originalveröffentlichung/Quelle</a>
Tobias Mai
Susanne Boye
Jiayin Yuan
Antje Völkel
Marlies Gräwert
Christina Günter
Albena Lederer
Andreas Taubert
Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe
208
Chemie und zugeordnete Wissenschaften
Institut für Chemie
Referiert
Open Access
Universität Potsdam
https://publishup.uni-potsdam.de/files/8529/pmnr208.pdf
60487
2023
2023
eng
7
1341
postprint
1
2023-03-22
2023-03-22
--
N-Butyl Pyridinium Diiodido Argentate(I)
A new solid-state material, N-butyl pyridinium diiodido argentate(I), is synthesized using a simple and effective one-pot approach. In the solid state, the compound exhibits 1D ([AgI2](-))(n) chains that are stabilized by the N-butyl pyridinium cation. The 1D structure is further manifested by the formation of long, needle-like crystals, as revealed from electron microscopy. As the general composition is derived from metal halide-based ionic liquids, the compound has a low melting point of 100-101 degrees C, as confirmed by differential scanning calorimetry. Most importantly, the compound has a conductivity of 10(-6) S cm(-1) at room temperature. At higher temperatures the conductivity increases and reaches to 10(-4 )S cm(-1) at 70 degrees C. In contrast to AgI, however, the current material has a highly anisotropic 1D arrangement of the ionic domains. This provides direct and tuneable access to fast and anisotropic ionic conduction. The material is thus a significant step forward beyond current ion conductors and a highly promising prototype for the rational design of highly conductive ionic solid-state conductors for battery or solar cell applications.
Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe
A One-Dimensional Ag-I Network with Superior Solid-State Ionic Conductivity at Room Temperature
10.25932/publishup-60487
1866-8372
urn:nbn:de:kobv:517-opus4-604874
outputup:dataSource:Publikationsfonds:2023
WOS:000955536300001
Bhattacharyya, B; Taubert, A (corresponding author), Univ Potsdam, Inst Chem, D-14476 Potsdam, Germany., bhattacharyya@uni-potsdam.de; ataubert@uni-potsdam.de
Taubert, Andreas
2023-08-15T14:37:47+00:00
sword
importub
filename=package.tar
23837d871f496de90e87650484139b88
Version of record
Bhattacharyya, Biswajit
<a href="https://publishup.uni-potsdam.de/60486">Bibliographieeintrag der Originalveröffentlichung/Quelle</a>
CC-BY - Namensnennung 4.0 International
Biswajit Bhattacharyya
Christian Balischewski
Eric Sperlich
Christina Günter
Stefan Mies
Alexandra Kelling
Andreas Taubert
Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe
1341
eng
uncontrolled
AgI
eng
uncontrolled
ionic conductivity
eng
uncontrolled
Ionic liquids
eng
uncontrolled
thermal properties
Chemie und zugeordnete Wissenschaften
open_access
Institut für Chemie
Institut für Geowissenschaften
Referiert
Import
Green Open-Access
Universität Potsdam
https://publishup.uni-potsdam.de/files/60487/zmnr1341.pdf
48603
2020
2020
eng
26
1026
postprint
1
2020-12-09
2020-12-09
--
Mixed Mercaptocarboxylic Acid Shells Provide Stable Dispersions of InPZnS/ZnSe/ZnS Multishell Quantum Dots in Aqueous Media
Highly luminescent indium phosphide zinc sulfide (InPZnS) quantum dots (QDs), with zinc selenide/zinc sulfide (ZnSe/ZnS) shells, were synthesized. The QDs were modified via a post-synthetic ligand exchange reaction with 3-mercaptopropionic acid (MPA) and 11-mercaptoundecanoic acid (MUA) in different MPA:MUA ratios, making this study the first investigation into the effects of mixed ligand shells on InPZnS QDs. Moreover, this article also describes an optimized method for the correlation of the QD size vs. optical absorption of the QDs. Upon ligand exchange, the QDs can be dispersed in water. Longer ligands (MUA) provide more stable dispersions than short-chain ligands. Thicker ZnSe/ZnS shells provide a better photoluminescence quantum yield (PLQY) and higher emission stability upon ligand exchange. Both the ligand exchange and the optical properties are highly reproducible between different QD batches. Before dialysis, QDs with a ZnS shell thickness of ~4.9 monolayers (ML), stabilized with a mixed MPA:MUA (mixing ratio of 1:10), showed the highest PLQY, at ~45%. After dialysis, QDs with a ZnS shell thickness of ~4.9 ML, stabilized with a mixed MPA:MUA and a ratio of 1:10 and 1:100, showed the highest PLQYs, of ~41%. The dispersions were stable up to 44 days at ambient conditions and in the dark. After 44 days, QDs with a ZnS shell thickness of ~4.9 ML, stabilized with only MUA, showed the highest PLQY, of ~34%.
Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe
10.25932/publishup-48603
urn:nbn:de:kobv:517-opus4-486032
1866-8372
Nanomaterials 10 (2020) 9 Art.1858 DOI: doi: 10.3390/nano10091858
1858
<a href="http://publishup.uni-potsdam.de/48602">Bibliographieeintrag der Originalveröffentlichung/Quelle</a>
false
true
CC-BY - Namensnennung 4.0 International
Benjamin Heyne
Kristin Arlt
André Geßner
Alexander F. Richter
Markus Döblinger
Jochen Feldmann
Andreas Taubert
Armin Wedel
Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe
1026
eng
uncontrolled
quantum dots
eng
uncontrolled
cadmium-free
eng
uncontrolled
Cd-free
eng
uncontrolled
InP
eng
uncontrolled
InPZnS
eng
uncontrolled
multishell
eng
uncontrolled
mercaptocarboxylic acids
eng
uncontrolled
3-mercaptopropionic acid
eng
uncontrolled
11-mercaptoundecanoic acid
eng
uncontrolled
phase transfer
eng
uncontrolled
ligand exchange
eng
uncontrolled
aqueous dispersion
eng
uncontrolled
QDs
Chemie und zugeordnete Wissenschaften
Biowissenschaften; Biologie
open_access
Institut für Chemie
Referiert
Green Open-Access
Universität Potsdam
https://publishup.uni-potsdam.de/files/48603/pmnr1026.pdf
58751
2022
2022
eng
35072
35082
11
1316
postprint
1
2023-04-12
2023-04-12
--
Mixed chloridometallate(ii) ionic liquids with tunable color and optical response for potential ammonia sensors
Eight d-metal-containing N-butylpyridinium ionic liquids (ILs) with the nominal composition (C4Py)2[Ni0.5M0.5Cl4] or (C4Py)2[Zn0.5M0.5Cl4] (M = Cu, Co, Mn, Ni, Zn; C4Py = N-butylpyridinium) were synthesized, characterized, and investigated for their optical properties. Single crystal and powder X-ray analysis shows that the compounds are isostructural to existing examples based on other d-metal ions. Inductively coupled plasma optical emission spectroscopy measurements confirm that the metal/metal ratio is around 50 : 50. UV-Vis spectroscopy shows that the optical absorption can be tuned by selection of the constituent metals. Moreover, the compounds can act as an optical sensor for the detection of gases such as ammonia as demonstrated via a simple prototype setup.
Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe
10.25932/publishup-58751
urn:nbn:de:kobv:517-opus4-587512
1866-8372
Version of record
Taubert, Andreas
<a href="https://publishup.uni-potsdam.de/58750">Bibliographieeintrag der Originalveröffentlichung/Quelle</a>
Karsten Behrens
Christian Balischewski
Eric Sperlich
Antonia Isabell Menski
Ruth Fabiola Balderas-Valadez
Claudia Pacholski
Christina Günter
Susanne Lubahn
Alexandra Kelling
Andreas Taubert
Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe
1316
Chemie und zugeordnete Wissenschaften
open_access
Institut für Chemie
Referiert
Green Open-Access
Universität Potsdam
https://publishup.uni-potsdam.de/files/58751/zmnr1316.pdf