High-pressure studies of dynamic solvent effects on large amplitude isomerization: 2-(2-propenyl)anthracene

被引：17
|
作者：
Hara, K
Ito, N
Kajimoto, O
机构：
[1] Division of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku
来源：
JOURNAL OF PHYSICAL CHEMISTRY A | 1997年 / 101卷 / 12期
关键词：
D O I：
10.1021/jp962941x
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：
Effect of pressure on the excited-state isomerization rate of 2-(2-propenyl)anthracene in a series of alkane solvents was examined by steady-state and picosecond time-resolved fluorescence spectroscopy. The viscosity dependence of the isomerization rate constant was analyzed by the theories of the dynamic solvent effect on chemical reactions. The viscosity dependence is sufficiently smaller than that predicted by Kramers theory. The experimental result was analyzed by the frequency-dependent friction defined in the Grote-Hynes theory,and the barrier top frequency (omega(b) = 9.6 x 10(12) s(-1)) was determined.
引用
收藏
页码：2240 / 2244
页数：5
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