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Synthesis of silsesquioxanes having photochromic diarylethene pendant groups
Author(s) -
Nakashima Hisataka,
Irie Masahiro
Publication year - 1997
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.1997.030180801
Subject(s) - photochromism , chromophore , diarylethene , glass transition , polymer , polymer chemistry , ring (chemistry) , photochemistry , chemistry , materials science , organic chemistry
Abstract Silsesquioxanes having 1‐(2‐methylbenzo[b]thien‐3‐yl)‐2‐[5‐(4‐butylphenyl)‐2,4‐dimethylthien‐3‐yl]perfluorocyclopentenes as the pendant groups were synthesized. Photochemical conversion from the open‐ring to the closed‐ring form of diarylethenes chemically bonded to polymers was by 15–25% lower than the conversion of the chromophores dispersed in the same matrix. No appreciable difference in the photoconversion of the fixed chromophores was observed below and above the glass transition temperature ( T g ) of the polymer films.