Controlled self-assembly of chiral gelator molecules into aligned fibers induced by nematic to smectic B phase transitions |
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Authors: | Nataša Šijakovi? Vuji?i? Andreja Lesac |
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Institution: | a Laboratory of Supramolecular and Nucleoside Chemistry, Rudjer Boskovic Institute, Bijenicka 54, Zagreb 10000, Croatia b Laboratory for Stereoselective Catalysis and Biocatalysis, Rudjer Boskovic Institute, Bijenicka 54, Zagreb 10000, Croatia |
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Abstract: | Chiral bisoxalamide 1 shows remarkable gelling capacity of the nematic and smectic B liquid-crystalline phases of heptylcyclohexanecarboxylic acid (HCCA). Chiral nematic-containing left-handed helical fiber bundles are formed if the gelator is present in amounts higher than 0.55 wt %. With lower amounts of 1, no nematic gel forms, however, a nematic to smectic B phase transition triggers instantaneous self-assembly of gelator molecules into aligned fibers. The latter liquid crystalline gel system represents an example of controlled self-assembly induced by a liquid crystalline phase transition. |
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Keywords: | Self-assembly Gelator Liquid crystalline gel Aligned fibers Controlled self-assembly |
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