The role of triplet state of nitrospiropyran in their photochromic reaction.

M Sakuragi, K Aoki, T Tamaki, K Ichimura

Index: Sakuragi; Aoki; Tamaki; Ichimura Bulletin of the Chemical Society of Japan, 1990 , vol. 63, # 1 p. 74 - 79

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Citation Number: 60

Abstract

The effects of intermolecular and intramolecular triplet quenchers and sensitizers on the photochromism of nitrospiropyran have been examined in order to clarify the role of the triplet state (3 A*) as well as that of the excited singlet state (1 A*). The rates of photocoloration and fatigue were significantly affected: the quenchers retarded both rates, while the sensitizers retarded the former but enhanced the latter rate. It can be concluded ...