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Photochromic liquid crystalline structures containing azobenzene moieties
Author(s) -
Studenovský Martin,
Sedláková Zdenka,
Wang Geng,
Nešpůrek Stanislav,
Janus Krzysztof,
Boiko Olexandr P.,
Kajzar Francois
Publication year - 2004
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200450849
Subject(s) - photochromism , azobenzene , isomerization , materials science , polymer , polymer chemistry , azo compound , methyl methacrylate , methacrylate , polyurethane , photochemistry , chemistry , organic chemistry , copolymer , catalysis , composite material
Novel liquid crystalline photochromic materials of the type 4‐R‐C 6 H 4 ‐N=N‐C 6 H 4 ‐O(CH 2 ) n ‐N(CH 2 CH 2 OH) 2 , where R is NO 2 , H, CN, O‐ n ‐C 8 H 17 , phenyl, 4‐O 2 NC 6 H 4 , were prepared. Some of them are photoconductive. These materials were used for the preparation of light‐sensitive polymers in which the photoactive moieties were attached to polyurethane chain. Photochromism of these compounds is based on trans‐cis isomerization of azobenzene group. An example of the photochromic activity is presented on solid solution of one material (R = O‐ n ‐C 8 H 17 , n = 5) in poly(methyl methacrylate) matrix.