PROTON-TRANSFER AND SOLVENT POLARIZATION DYNAMICS IN 3-HYDROXYFLAVONE .2. MIXED-SOLVENTS

被引：59

作者：

SWINNEY, TC ^{[1
]}

KELLEY, DF ^{[1
]}

机构：

[1] COLORADO STATE UNIV,DEPT CHEM,FT COLLINS,CO 80523

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1991年 / 95卷 / 25期

关键词：

D O I：

10.1021/j100178a024

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：

Excited-state intramolecular proton-transfer (ESIPT) dynamics of 3-hydroxyflavone (3HF) in benzonitrile, acetonitrile/benzene, and acetonitrile/CCl4 solvent mixtures has been studied using static and picosecond spectroscopies. The ESIPT times in pure benzonitrile, and in 0.13:0.87 mole fraction acetonitrile:benzene and a 0. 14:0.86 mole fraction acetonitrile:CCl4 solvent mixtures were determined to be 3.2, 1.9, and 1.8 ps, respectively. The solvent-induced barriers to ESIPT in the mixed solvents were calculated to be the same as in benzonitrile, based on a simple dielectric continum model. These rates can be understood using a model in which the ESIPT dynamics are controlled by the rate of solvent reorganization.

引用

页码：10369 / 10373

页数：5

共 26 条

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