SOLVENT EFFECT ON THE EXCITED-STATE BEHAVIOR OF DONOR-ACCEPTOR-SUBSTITUTED BIARYLS

被引：16

作者：

LAHMANI, F ^{[1
]}

BREHERET, E ^{[1
]}

DAZY, OB ^{[1
]}

ZEHNACKERRENTIEN, A ^{[1
]}

DELOUIS, JF ^{[1
]}

机构：

[1] ECOLE NORMALE SUPER,PHOTOPHYS & PHOTOCHIM SUPRAMOLEC & MACROMOLEC LAB,F-94235 CACHAN,FRANCE

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 1995年 / 89卷 / 03期

关键词：

SOLVENT EFFECT; EXCITED STATE BEHAVIOR; DONOR-ACCEPTOR SUBSTITUTED BIARYLS;

D O I：

10.1016/1010-6030(95)04049-L

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 fluorescence properties of two biaryl donor-acceptor compounds (4-dimethylamino-4'-cyanobiphenyl (DMACNB) and 4-dimethylanilino-1-cyanonaphthalene (DMACNN)) were compared in solvents of different polarity. Low temperature, steady state spectra were also studied in non-polar and polar media. The transient Stokes shifts measured with 30 ps excitation in 1-propanol and 1-hexanol at room temperature show that the charge transfer process is controlled by the dynamics of solvation. A large decrease in the radiative rate constant as a function of the solvent polarity and as a function of time in 1-hexanol solution was observed for DMACNN, whereas this effect was not significant in the case of DMACNB. These differences have been related to the larger steric hindrance to coplanarity in the phenylnaphthalene derivative with respect to that in the substituted biphenyl.

引用

页码：191 / 199

页数：9

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