Issue 6, 2009
From the journal:

New Journal of Chemistry

Ultrafast laser spectroscopic study on photochromic cycloreversion dynamics in fulgide derivatives: one-photon and multiphoton-gated reactions

Yukihide Ishibashi,ab   Tetsuro Katayama,a   Chikashi Ota,a   Seiya Kobatake,c   Masahiro Irie,d   Yasushi Yokoyamae  and  Hiroshi Miyasaka*ab  

* Corresponding authors

a Division of Frontier Materials Science, Graduate School of Engineering Science, Center for Quantum Science and Technology under Extreme Conditions, Osaka University, Toyonaka, Osaka, Japan
E-mail: miyasaka@chem.es.osaka-u.ac.jp
Fax: +81-(0)6-6850-6244
Tel: +81-(0)6-6850-6241

b CREST, JST, Toyonaka, Osaka, Japan

c Department of Applied Chemistry, Graduate School of Engineering, Osaka City University, Sumiyoshi, Osaka, Japan

d Department of Chemistry, School of Science, Rikkyo University, Nishi-Ikebukuro, Toshima, Tokyo, Japan

e Department of Materials Chemistry, Graduate School of Engineering, Yokohama National University, Tokiwadai, Hodogaya, Yokohama, Japan

Abstract

Cycloreversion processes of three photochromic fulgide derivatives in toluene solution were investigated by means of picosecond and femtosecond laser photolysis methods. Femtosecond laser irradiation revealed that the cycloreversion processes upon visible one-photon excitation took place within a few ps in these three derivatives. On the other hand, drastic enhancements of the reaction yield were observed under picosecond laser exposure. Excitation intensity effect of the reaction yield and dynamic behaviors revealed that the successive two-photon absorption process leading to higher excited states opened the efficient cycloreversion channel in the three derivatives. The reaction yields in higher excited states were found to be quite large in these three systems, 0.35–0.55, while those in the S1 state were 0.048–0.21. The correlation of the reaction yield in the S1 state with that in Sn states suggest the character of the electronic states connected by the optical absorption plays an important role in the control of the cycloreversion reaction.

Graphical abstract: Ultrafast laser spectroscopic study on photochromic cycloreversion dynamics in fulgide derivatives: one-photon and multiphoton-gated reactions

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Article information

DOI
https://doi.org/10.1039/B900999J
Article type
Paper
Submitted
16 Jan 2009
Accepted
24 Mar 2009
First published
16 Apr 2009

New J. Chem., 2009,33, 1409-1419

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Ultrafast laser spectroscopic study on photochromic cycloreversion dynamics in fulgide derivatives: one-photon and multiphoton-gated reactions

Y. Ishibashi, T. Katayama, C. Ota, S. Kobatake, M. Irie, Y. Yokoyama and H. Miyasaka, New J. Chem., 2009, 33, 1409 DOI: 10.1039/B900999J

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