PICOSECOND NANOSECOND LASER PHOTOLYSIS STUDIES ON THE PHOTOCHEMICAL-REACTION OF EXCITED BENZOPHENONE WITH 1,4-DIAZABICYCLO[2.2.2]OCTANE IN ACETONITRILE SOLUTION - PROTON ABSTRACTION OF THE FREE BENZOPHENONE ANION RADICAL FROM THE GROUND-STATE AMINE

被引：61

作者：

MIYASAKA, H

MORITA, K

KAMADA, K

MATAGA, N

机构：

[1] Department of Chemistry, Faculty of Engineering Science, Osaka University, Toyonaka, Osaka

来源：

CHEMICAL PHYSICS LETTERS | 1991年 / 178卷 / 5-6期

关键词：

D O I：

10.1016/0009-2614(91)87010-9

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：

Picosecond and nanosecond dynamics of the ion pair produced by the electron transfer reaction between the triplet state benzophenone (3BP*) and 1,4-diazabicyclo[2.2.2]octane (DABCO) was investigated by means of transient absorption spectroscopy and laser-induced photoconductivity measurement. It has been revealed that the solvated free anion radical of BP, produced by the rapid ionic dissociation of the ion pair within 2 ns, abstracts proton from the neutral DABCO giving benzophenone ketyl radical, competing with the charge recombination reaction at encounter with DABCO+, decomposition and/or impurity scavenging processes.

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页码：504 / 510

页数：7

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