Title

Efficient Photochromic Transformation of a New Fluorenyl Diarylethene: One- and Two-Photon Absorption Spectroscopy

Authors

Authors

G. Luchita; M. V. Bondar; S. Yao; I. A. Mikhailov; C. O. Yanez; O. V. Przhonska; A. E. Masunov;K. D. Belfield

Comments

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Abbreviated Journal Title

ACS Appl. Mater. Interfaces

Keywords

photochromic reaction; photoisomerization; diarylethene; two-photon; absorption; transient absorption spectroscopy; OPTICAL-DATA STORAGE; NONDESTRUCTIVE READOUT; MOLECULAR SWITCHES; LASER; PHOTOLYSIS; DERIVATIVES; DEVICES; LIGHT; CHROMOPHORES; DYNAMICS; FLUOROPHORES; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary

Abstract

Efficient reversible phototransformation of a new diarylethene-fluorene derivative, 1,2-bis(5-(9,9-didecyl-7-nitro-9H-fluoren-2-yl)-2-methylthiophen-3-yl)cyclopent-1-ene (1), was demonstrated in organic media under low-intensity laser excitation. Linear photophysical characterization of 1 was performed at room temperature in solvents of different polarity and viscosity. Significantly, close to unity quantum yield for the cyclization reaction of 1 was shown in nonpolar solutions. The lifetimes of the excited states of the open (OF) and closed (CF) forms of 1 were measured by a femtosecond transient absorption technique, and corresponding values of similar to 0.7 and similar to 0.9 ps were shown in dichloromethane (DCM), respectively. Degenerate two-photon absorption (2PA) spectra of the OF and CF of 1 were obtained over a broad spectral range by the open aperture Z-scan method under 1 kHz femtosecond excitation. The values of 2PA cross sections of the OF in DCM (similar to 50-70 GM) were found to increase up to 1 order of magnitude (similar to 600 GM) after cyclization to the CF. The nature of cyclization and cylcoreversion processes were investigated by quantum chemistry with employment of DFT-based methods implemented in the Gaussian'09 program. The potential of 1 for application in optical data storage was shown using poly(methyl methacrylate)-doped films and two-photon fluorescence microscopy readout.

Journal Title

Acs Applied Materials & Interfaces

Volume

3

Issue/Number

9

Publication Date

1-1-2011

Document Type

Article

Language

English

First Page

3559

Last Page

3567

WOS Identifier

WOS:000295236900049

ISSN

1944-8244

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