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Synthesis of silsesquioxanes having photochromic diarylethene pendant groups

✍ Scribed by Hisataka Nakashima; Masahiro Irie

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
381 KB
Volume
18
Category
Article
ISSN
1022-1336

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✦ Synopsis

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.

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