TY - JOUR
T1 - One- and two-photon photochromism of 3,4-bis-(2,4,5-trimethyl-thiophen-3-yl)furan-2,5-dione
AU - Corredor, Claudia C.
AU - Belfield, Kevin D.
AU - Bondar, Mykhailo V.
AU - Przhonska, Olga V.
AU - Hernandez, Florencio E.
AU - Kachkovsky, Oleksiy D.
N1 - Funding Information:
We wish to acknowledge the U.S. Civilian Research and Development Foundation (UK-C2-2574-MO-04), the donors of The Petroleum Research Fund of the American Chemical Society, the National Science Foundation (ECS-0217932 and DMR-9975773) and the University of Central Florida Presidential Initiative for Major Research Equipment for partial support of this work.
PY - 2006/11/15
Y1 - 2006/11/15
N2 - 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 (AM1, 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 ≈80 GM at 674 nm, was obtained using an up-converted fluorescence method. Two-photon induced cyclization reaction of 1 was accomplished under picosecond excitation and the corresponding reaction quantum yield was estimated, providing a comprehensive investigation of this 2PA photochrome.
AB - 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 (AM1, 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 ≈80 GM at 674 nm, was obtained using an up-converted fluorescence method. Two-photon induced cyclization reaction of 1 was accomplished under picosecond excitation and the corresponding reaction quantum yield was estimated, providing a comprehensive investigation of this 2PA photochrome.
KW - Diarylethene
KW - Photochromic
KW - Photoisomerization
KW - Two-photon excitation
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U2 - 10.1016/j.jphotochem.2006.04.012
DO - 10.1016/j.jphotochem.2006.04.012
M3 - Article
AN - SCOPUS:33749504701
SN - 1010-6030
VL - 184
SP - 177
EP - 183
JO - Journal of Photochemistry and Photobiology A: Chemistry
JF - Journal of Photochemistry and Photobiology A: Chemistry
IS - 1-2
ER -