Title

One- and two-photon photochromism of 3,4-bis-(2,4,5-trimethyl-thiophen-3-yl)furan-2,5-dione

Authors

Authors

C. C. Corredor; K. D. Belfield; M. V. Bondar; O. V. Przhonska; F. E. Hernandez;O. D. Kachkovsky

Comments

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Abbreviated Journal Title

J. Photochem. Photobiol. A-Chem.

Keywords

photochromic; photoisomerization; diarylethene; two-photon excitation; OPTICAL-DATA STORAGE; DIARYLETHENE DERIVATIVES; NONDESTRUCTIVE READOUT; POLYMER; MEMORY; FLUOROPHORES; MICROSCOPE; COPOLYMERS; EXCITATION; ANHYDRIDE; Chemistry, Physical

Abstract

Photochromic properties of the diarylethene derivative 3,4-bis-(2,4,5-trimethyl-thiophen-3-yl)furan-2,5-dione (1) were investigated in hexane at room temperature under one-photon (linear) and two-photon (nonlinear) excitation. Results of steady-state excitation anisotropy and quantum-chemical calculations (AMI, ZINDO/S) provide insight into the nature of the broad absorption spectrum of the open-form of 1 as an overlapped mixture of several electronic transitions. The quantum yields of cyclization and cycloreversion reactions of 1 were obtained over a broad spectral range and the photochemical stability of 1 was determined for different excitation wavelengths. The two-photon absorption (2PA) spectrum of the open-form of 1, with maximum cross-section approximate to 80 GM at 674 nm, was obtained using an up-converted fluorescence method. Two-photon induced cyclization reaction of I was accomplished under picosecond excitation and the corresponding reaction quantum yield was estimated, providing a comprehensive investigation of this 2PA photochrome. (c) 2006 Elsevier B.V. All rights reserved.

Journal Title

Journal of Photochemistry and Photobiology a-Chemistry

Volume

184

Issue/Number

1-2

Publication Date

1-1-2006

Document Type

Article

Language

English

First Page

177

Last Page

183

WOS Identifier

WOS:000243145200023

ISSN

1010-6030

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