Photochromic liquid-crystalline copolymers containing crown ether groups |
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Authors: | V P Shibaev A S Medvedev A Yu Bobrovsky |
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Institution: | (1) Department of Chemistry, M. V. Lomonosov Moscow State University, 1 Leninskie Gory, 119992 Moscow, Russian Federation |
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Abstract: | An approach was developed for the synthesis of new multifunctional photosensitive liquid-crystalline copolymers of the acryl
series containing azobenzene, ionophoric, and mesogenic groups in the same macromolecule. The phase behavior of the copolymers
was studied. Most of these copolymers were demonstrated to form nematic mesophases. An increase in the concentration of crown-containing
groups to 26 mol.% leads to amorphization of the copolymers. The influence of complexation of the crown ether groups of the
copolymers with potassium perchlorate on the mesomorphic properties of the systems was investigated. A comparative study of
the photooptical properties of the copolymers in solution and thin films was performed.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 12, pp. 2332–2242, December, 2007. |
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Keywords: | azobenzene crown ether fragments complexation properties photochromic properties multifunctional comb-shaped liquid-crystalline copolymers |
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