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Effect of Molecular Structure and Thermal Treatment on Photo‐optical Properties of Photochromic Azobenzene‐containing Polymer Films
Author(s) -
Bobrovsky Alexey,
Shibaev Valery,
Bubnov Alexej,
Hamplová Vĕra,
Kašpar Miroslav,
Pociecha Damian,
Glogarová Milada
Publication year - 2011
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201000534
Subject(s) - azobenzene , photochromism , chromophore , polymer , materials science , photochemistry , azo compound , kinetics , irradiation , polymer chemistry , phase (matter) , chemistry , organic chemistry , composite material , physics , quantum mechanics , nuclear physics
Three novel photochromic azobenzene‐containing comb‐shaped polyacrylates are synthesized and their phase behavior and photo‐optical properties are studied. The influence of the side photochromic group structure, thermal treatment, and light irradiation on aggregation of azobenzene chromophores in thin spin‐coated films of the polymers is investigated in detail. Special attention is paid to studying the photo‐orientation processes in polymers films induced by polarized blue light (473 nm). The relationship between the photochromic group architecture, phase behavior, thermal treatment of films, and kinetics of chromophore photo‐orientation is established and discussed. It is found that the position of the NN bond in chromophores plays an important role in the kinetics of the process, but does not affect the maximum value of dichroism.