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Andreas Taubert

Publications and source records attributed to Andreas Taubert.

5 recordsLinked to original sources
PubMed2005

Ionic liquid crystal precursors for inorganic particles: phase diagram and thermal properties of a CuCl nanoplatelet precursor.

We have recently reported (Angew. Chem. Int. Ed. 2004, 43 (40), 5380) the formation of CuCl nanoplatelets from an ionic liquid crystal precursor (ILCP) consisting of a 50/50 (wt/wt) mixture of bis(dodecylpyridinium) tetrachlorocuprate 1 and 6-O-palmitoyl ascorbic acid 2. Here we present the full ILCP phase diagram and the thermal behavior from a mixing ratio of 1/0 (i.e., pure 1) to 0/1 (i.e., pure 2). The ILCP exhibits a crystalline-smectic-isotropic phase transition at all mixing ratios, and the liquid crystal region is up to 90 degrees C wide. DSC shows a broad exothermic peak between ca. 70 and 170 degrees C, which is associated with the thermally induced CuCl formation. The reaction enthalpies reach -150 kJ/mol at around 50/50 (wt/wt) mixtures of the two components, and the activation energy for CuCl formation is ca. 190 kJ/mol. Thermogravimetric analysis shows that the samples degrade above ca. 200 degrees C.

Journal Article↗
PubMed2004

Soft nanotubes from amphiphilic ABA triblock macromonomers.

Soft, water-filled polymer nanotubes of several tens of microm in length have been prepared via self-assembly of amphiphilic ABA-triblock macromonomers in aqueous media; the tubes are mechanically and chemically stable and can be loaded with water-soluble substances.

Journal Article↗
PubMed2004

Self-assembly of reactive amphiphilic block copolymers as mimetics for biological membranes.

Over the years, polymers have attracted a great deal of interest because they offer a unique platform for the development of materials in fields as diverse as biomedicine and packaging. Many of these purposes use polymers that had been developed for totally different applications. Recently, however, chemical tailoring and molecular and supramolecular control of the chemistry and, thus, the physical and biological response have become a key interest of many researchers. In particular, systems that operate in aqueous media have become an intensely researched field. This is mostly because many devices must be biocompatible, which implies that they have to function in aqueous solutions. Over the past few years, new approaches for mimicking cell surfaces, for generating biocompatible and bioactive drug delivery systems, and for directed targeting have been developed. One recent development is polymeric systems with an enhanced biofunctionality, such as amphiphilic block copolymers that can act as mimetics for biological membranes. Because there are virtually no limits to combinations of monomers, biological and synthetic building blocks, ligands, receptors, and other proteins, polymer hybrid materials show a great promise for applications in biomedicine and biotechnology.

Biocompatible Materials↗