PHOTOINDUCED INTRAMOLECULAR CHARGE-TRANSFER AND TRANS-CIS ISOMERIZATION OF THE DCM STYRENE DYE - PICOSECOND AND NANOSECOND LASER SPECTROSCOPY, HIGH-PERFORMANCE LIQUID-CHROMATOGRAPHY, AND NUCLEAR MAGNETIC-RESONANCE STUDIES

被引：108

作者：

MEYER, M ^{[1
]}

MIALOCQ, JC ^{[1
]}

PERLY, B ^{[1
]}

机构：

[1] CENS,CEA,CNRS,IRDI,DESICP,DLPC,SCM,URA 331,F-91191 GIF SUR YVETTE,FRANCE

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1990年 / 94卷 / 01期

关键词：

D O I：

10.1021/j100364a015

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The photoexcitation of 4-(dicyanomethylene)-2-methyl-6-[p-(dimethylamino)styryl]-4H-pyran (DCM) induces a large intramolecular charge transfer (ICT) from the dimethylamino electron-donor group to the dicyanomethylene acceptor group. The dramatic effect of the solvent polarity on the absorption and fluorescence spectra on the one hand and the competition between the nonradiative S1 → S0 deactivation and trans → cis isomerization processes on the other hand has been examined. Our results clearly show that DCM isomerization efficiency is very low in the more polar solvents. The S1 → S0 internal conversion may intervene at a torsional angle smaller than 90° before reaching the perpendicular configuration. © 1990 American Chemical Society.

引用

页码：98 / 104

页数：7

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