TY - JOUR A1 - Zhang, Weiyi A1 - Willa, Christoph A1 - Sun, Jian-Ke A1 - Guterman, Ryan A1 - Taubert, Andreas A1 - Yuan, Jiayin T1 - Polytriazolium poly(ionic liquid) bearing triiodide anions: Synthesis, basic properties and electrochemical behaviors JF - Polymer : the international journal for the science and technology of polymers N2 - 4-Methyl-1-vinyl-1,2,4-triazolium triiodide ionic liquid and its polymer poly(4-methyl-1-vinyl-1,2,4-triazolium) triiodide were prepared for the first time from their iodide precursors via the reaction of iodide (I-) with elemental iodine (I-2). The change from iodide to triiodide (I-3(-)) was found to introduce particular variations in the physical properties of these two compounds, including lower melting point/glass transition temperature and altered solubility. The compounds were characterized by single-crystal X-ray diffraction, elemental analysis, and their electrochemical properties examined in solution and in the solid-state. Compared with their iodide analogues, the triiodide salts exhibited lower electrical impedance and higher current in the cyclic voltammetry. We found that poly(4-methyl-1,2,4-triazolium triiodide) was proven to be a promising solid polymer electrolyte candidate. (C) 2017 Elsevier Ltd. All rights reserved. KW - Poly(ionic liquid) KW - Solid polymer electrolyte KW - Grotthuss mechanism KW - Triiodide "network" Y1 - 2017 U6 - https://doi.org/10.1016/j.polymer.2017.07.059 SN - 0032-3861 SN - 1873-2291 VL - 124 SP - 246 EP - 251 PB - Elsevier CY - Oxford ER - TY - JOUR A1 - Hentrich, Doreen A1 - Taabache, Soraya A1 - Brezesinski, Gerald A1 - Lange, Nele A1 - Unger, Wolfgang A1 - Kuebel, Christian A1 - Bertin, Annabelle A1 - Taubert, Andreas T1 - A Dendritic Amphiphile for Efficient Control of Biomimetic Calcium Phosphate Mineralization JF - Macromolecular bioscience N2 - The phase behavior of a dendritic amphiphile containing a Newkome-type dendron as the hydrophilic moiety and a cholesterol unit as the hydrophobic segment is investigated at the air-liquid interface. The amphiphile forms stable monomolecular films at the airliquid interface on different subphases. Furthermore, the mineralization of calcium phosphate beneath the monolayer at different calcium and phosphate concentrations versus mineralization time shows that at low calcium and phosphate concentrations needles form, whereas flakes and spheres dominate at higher concentrations. Energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and electron diffraction confirm the formation of calcium phosphate. High-resolution transmission electron microscopy and electron diffraction confirm the predominant formation of octacalcium phosphate and hydroxyapatite. The data also indicate that the final products form via a complex multistep reaction, including an association step, where nano-needles aggregate into larger flake-like objects. Y1 - 2017 U6 - https://doi.org/10.1002/mabi.201600524 SN - 1616-5187 SN - 1616-5195 VL - 17 SP - 2541 EP - 2548 PB - Wiley-VCH CY - Weinheim ER - TY - JOUR A1 - Hentrich, Doreen A1 - Brezesinski, Gerald A1 - Kuebel, Christian A1 - Bruns, Michael A1 - Taubert, Andreas T1 - Cholesteryl Hemisuccinate Monolayers Efficiently Control Calcium Phosphate Nucleation and Growth JF - Crystal growth & design : integrating the fields of crystal engineering and crystal growth for the synthesis and applications of new materials N2 - The article describes the phase behavior of cholesteryl hemisuccinate at the air-liquid interface and its effect on calcium phosphate (CP) mineralization. The amphiphile forms stable monolayers with phase transitions at the air-liquid interface from a gas to a tilted liquid-condensed (TLC) and finally to an untilted liquid-condensed (ULC) phase. CP mineralization beneath these monolayers leads to crumpled CP layers made from individual plates. The main crystal phase is octacalcium phosphate (OCP) along with a minor fraction of hydroxyapatite (HAP), as confirmed by X-ray photoelectron spectroscopy, energy dispersive X-ray spectroscopy, bright field transmission electron microscopy, and electron diffraction. Y1 - 2017 U6 - https://doi.org/10.1021/acs.cgd.7b00753 SN - 1528-7483 SN - 1528-7505 VL - 17 SP - 5764 EP - 5774 PB - American Chemical Society CY - Washington ER - TY - JOUR A1 - Peh, Eddie A1 - Liedel, Clemens A1 - Taubert, Andreas A1 - Tauer, Klaus T1 - Composition inversion to form calcium carbonate mixtures JF - CrystEngComm N2 - Composition inversion takes place in equimolar solid mixtures of sodium or ammonium carbonate and calcium chloride with respect to the combination of anions and cations leading to the corresponding chloride and calcite in complete conversion. The transformation takes place spontaneously under a variety of different situations, even in a powdery mixture resting under ambient conditions. Powder X-ray diffraction data and scanning electron microscopy micrographs are presented to describe the course of the reaction and to characterize the reaction products. The incomplete reaction in the interspace between two compressed tablets of pure starting materials leads to an electric potential due to the presence of uncompensated charges. Y1 - 2017 U6 - https://doi.org/10.1039/c7ce00433h SN - 1466-8033 VL - 19 SP - 3573 EP - 3583 PB - Royal Society of Chemistry CY - Cambridge ER - TY - GEN A1 - de Zea Bermudez, Veronica A1 - Leroux, Fabrice A1 - Rabu, Pierre A1 - Taubert, Andreas T1 - Hybrid nanomaterials: from the laboratory to the market T2 - Beilstein journal of nanotechnology KW - hybrid nanomaterials Y1 - 2017 U6 - https://doi.org/10.3762/bjnano.8.87 SN - 2190-4286 VL - 8 SP - 861 EP - 862 PB - Beilstein-Institut zur Förderung der Chemischen Wissenschaften CY - Frankfurt, Main ER - TY - JOUR A1 - Hentrich, Doreen A1 - Tauer, Klaus A1 - Espanol, Montserrat A1 - Ginebra, Maria-Pau A1 - Taubert, Andreas T1 - EDTA and NTA effectively tune the mineralization of calcium phosphate from bulk aqueous solution JF - Biomimetics N2 - This study describes the effects of nitrilotriacetic acid (NTA) and ethylenediaminotetraacetic acid (EDTA) on themineralization of calciumphosphate from bulk aqueous solution. Mineralization was performed between pH 6 and 9 and with NTA or EDTA concentrations of 0, 5, 10, and 15 mM. X-ray diffraction and infrared spectroscopy show that at low pH, mainly brushite precipitates and at higher pH, mostly hydroxyapatite forms. Both additives alter the morphology of the precipitates. Without additive, brushite precipitates as large plates. With NTA, the morphology changes to an unusual rod-like shape. With EDTA, the edges of the particles are rounded and disk-like particles form. Conductivity and pH measurements suggest that the final products form through several intermediate steps. KW - biomineralization KW - biomimetic mineralization KW - calcium phosphate KW - NTA KW - EDTA KW - precipitation KW - brushite KW - hydroxyapatite Y1 - 2017 U6 - https://doi.org/10.3390/biomimetics2040024 SN - 2313-7673 VL - 2 IS - 4 PB - MDPI CY - Basel ER - TY - JOUR A1 - Lutze, Jana A1 - Bañares, Miguel A. A1 - Pita, Marcos A1 - Haase, Andrea A1 - Luch, Andreas A1 - Taubert, Andreas T1 - alpha-((4-Cyanobenzoyl)oxy)-omega-methyl poly(ethylene glycol) BT - a new stabilizer for silver nanoparticles JF - Beilstein journal of nanotechnology N2 - The article describes the synthesis and properties of alpha-((4-cyanobenzoyl)oxy)-omega-methyl poly(ethylene glycol), the first poly(ethylene glycol) stabilizer for metal nanoparticles that is based on a cyano rather than a thiol or thiolate anchor group. The silver particles used to evaluate the effectiveness of the new stabilizer typically have a bimodal size distribution with hydrodynamic diameters of ca. 13 and ca. 79 nm. Polymer stability was evaluated as a function of the pH value both for the free stabilizer and for the polymers bound to the surface of the silver nanoparticles using H-1 NMR spectroscopy and zeta potential measurements. The polymer shows a high stability between pH 3 and 9. At pH 12 and higher the polymer coating is degraded over time suggesting that alpha-((4-cyanobenzoyl) oxy)-omega-methyl poly(ethylene glycol) is a good stabilizer for metal nanoparticles in aqueous media unless very high pH conditions are present in the system. The study thus demonstrates that cyano groups can be viable alternatives to the more conventional thiol/thiolate anchors. KW - cyano anchor group KW - poly(ethylene glycol) KW - polymer coating KW - silver nanoparticles Y1 - 2017 U6 - https://doi.org/10.3762/bjnano.8.67 SN - 2190-4286 VL - 8 SP - 627 EP - 635 PB - Beilstein-Institut zur Förderung der Chemischen Wissenschaften CY - Frankfurt, Main ER - TY - JOUR A1 - Taubert, Andreas A1 - Löbbicke, Ruben A1 - Kirchner, Barbara A1 - Leroux, Fabrice T1 - First examples of organosilica-based ionogels BT - synthesis and electrochemical behavior JF - Beilstein journal of nanotechnology N2 - The article describes the synthesis and properties of new ionogels for ion transport. A new preparation process using an organic linker, bis(3-(trimethoxysilyl) propyl) amine (BTMSPA), yields stable organosilica matrix materials. The second ionogel component, the ionic liquid 1-methyl-3-(4-sulfobutyl) imidazolium 4-methylbenzenesulfonate, [BmimSO(3)H][PTS], can easily be prepared with near-quantitative yields. [BmimSO(3)H][PTS] is the proton conducting species in the ionogel. By combining the stable organosilica matrix with the sulfonated ionic liquid, mechanically stable, and highly conductive ionogels with application potential in sensors or fuel cells can be prepared. KW - ionic liquids KW - ionogels KW - organosilica KW - proton conductivity Y1 - 2017 U6 - https://doi.org/10.3762/bjnano.8.77 SN - 2190-4286 VL - 8 SP - 736 EP - 751 PB - Beilstein-Institut zur Förderung der Chemischen Wissenschaften CY - Frankfurt, Main ER - TY - GEN A1 - Zehbe, Kerstin A1 - Kollosche, Matthias A1 - Lardong, Sebastian A1 - Kelling, Alexandra A1 - Schilde, Uwe A1 - Taubert, Andreas T1 - Ionogels based on poly(methyl methacrylate) and metal-containing ionic liquids BT - correlation between structure and mechanical and electrical properties N2 - Ionogels (IGs) based on poly(methyl methacrylate) (PMMA) and the metal-containing ionic liquids (ILs) bis-1-butyl-3-methlimidazolium tetrachloridocuprate(II), tetrachloride cobaltate(II), and tetrachlorido manganate(II) have been synthesized and their mechanical and electrical properties have been correlated with their microstructure. Unlike many previous examples, the current IGs show a decreasing stability in stress-strain experiments on increasing IL fractions. The conductivities of the current IGs are lower than those observed in similar examples in the literature. Both effects are caused by a two-phase structure with micrometer-sized IL-rich domains homogeneously dispersed an IL-deficient continuous PMMA phase. This study demonstrates that the IL-polymer miscibility and the morphology of the IGs are key parameters to control the (macroscopic) properties of IGs. T3 - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 361 KW - microstructure KW - ionogels KW - ionic liquids KW - phase separation KW - mechanical properties KW - ionic conductivity Y1 - 2017 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-400607 ER - TY - JOUR A1 - Hamed Misbah, Mohamed A1 - Santos, Mercedes A1 - Quintanilla, Luis A1 - Günter, Christina A1 - Alonso, Matilde A1 - Taubert, Andreas A1 - Carlos Rodriguez-Cabello, Jose T1 - Recombinant DNA technology and click chemistry: a powerful combination for generating a hybrid elastin-like-statherin hydrogel to control calcium phosphate mineralization JF - Beilstein journal of nanotechnology N2 - Understanding the mechanisms responsible for generating different phases and morphologies of calcium phosphate by elastin-like recombinamers is supreme for bioengineering of advanced multifunctional materials. The generation of such multifunctional hybrid materials depends on the properties of their counterparts and the way in which they are assembled. The success of this assembly depends on the different approaches used, such as recombinant DNA technology and click chemistry. In the present work, an elastin-like recombinamer bearing lysine amino acids distributed along the recombinamer chain has been cross-linked via Huisgen [2 + 3] cycloaddition. The recombinamer contains the SN(A)15 peptide domains inspired by salivary statherin, a peptide epitope known to specifically bind to and nucleate calcium phosphate. The benefit of using click chemistry is that the hybrid elastin-like-statherin recombinamers cross-link without losing their fibrillar structure. Mineralization of the resulting hybrid elastin-like-statherin recombinamer hydrogels with calcium phosphate is described. Thus, two different hydroxyapatite morphologies (cauliflower- and plate-like) have been formed. Overall, this study shows that crosslinking elastin-like recombinamers leads to interesting matrix materials for the generation of calcium phosphate composites with potential applications as biomaterials. KW - calcium phosphate KW - elastin-like recombinamers KW - hydroxyapatite KW - mineralization KW - SN(A)15 Y1 - 2017 U6 - https://doi.org/10.3762/bjnano.8.80 SN - 2190-4286 VL - 8 SP - 772 EP - 783 PB - Beilstein-Institut zur Förderung der Chemischen Wissenschaften CY - Frankfurt, Main ER -