SOLVENT POLARITY EFFECTS ON INTRAMOLECULAR ELECTRON-TRANSFER - AN ESTIMATE OF ACTIVATION ENTROPIES

被引：35

作者：

HEITELE, H

POLLINGER, F

WEEREN, S

MICHELBEYERLE, ME

机构：

[1] Institut für Physikalische und Theoretische Chemie, Technische Universität München, D-8046 Garching

来源：

CHEMICAL PHYSICS LETTERS | 1990年 / 168卷 / 06期

关键词：

D O I：

10.1016/0009-2614(90)85679-7

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：

Electron-transfer rates were determined in solvents of different polarity as a function of temperature and analyzed in terms of activation energies and pre-exponential factors. Both were found to depend on the polarity of the solvent. The solvent dependence of the pre-exponential factor is interpreted as evidence for different activation entropies due to sizable reaction and (possibly) reorganization entropies. Theoretical estimates of differences in the activation entropies taking account of temperature-dependent reaction free energies and solvent reorganization energies are in qualitative agreement with the experiments. © 1990.

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页码：598 / 604

页数：7

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