Single- and Double-Pulse Laser Kinetic Spectroscopy of Indoline Spiropyran

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Abstract

Phototransformations of 6-nitro-8-methoxy-substituted indoline spiropyran in acetonitrile have been studied by laser kinetic spectroscopy (laser photolysis) with single- and double-pulse excitation. The role of the triplet state in the kinetics of photocoloration of spiropyran has been revealed. It has been shown that photochromic transformations of spiropyran involve unstable trans-isomers (conformers) of the open merocyanine form of spiropyran. Data on the transformation kinetics of the trans-isomers are presented.

About the authors

L. S. Atabekyan

Photochemistry Center, “Crystallography and Photonics” Federal Research Center, Russian Academy of Sciences

Email: levat51@mail.ru
Moscow, 119421 Russia

A. K. Chibisov

Photochemistry Center, “Crystallography and Photonics” Federal Research Center, Russian Academy of Sciences

Email: levat51@mail.ru
Moscow, 119421 Russia

T. A. Svyatoslavskaya

Photochemistry Center, “Crystallography and Photonics” Federal Research Center, Russian Academy of Sciences

Email: levat51@mail.ru
Moscow, 119421 Russia

N. L. Svyatoslavskii

Photochemistry Center, “Crystallography and Photonics” Federal Research Center, Russian Academy of Sciences

Email: levat51@mail.ru
Moscow, 119421 Russia

V. P. Markelov

Photochemistry Center, “Crystallography and Photonics” Federal Research Center, Russian Academy of Sciences

Author for correspondence.
Email: levat51@mail.ru
Moscow, 119421 Russia

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Copyright (c) 2023 Л.С. Атабекян, А.К. Чибисов, Т.А. Святославская, Н.Л. Святославский, В.П. Маркелов