FEMTOSECOND-PICOSECOND LASER PHOTOLYSIS STUDIES ON PHOTOREDUCTION PROCESS OF EXCITED BENZOPHENONE WITH N,N-DIMETHYLANILINE IN ACETONITRILE SOLUTION

被引：91

作者：

MIYASAKA, H ^{[1
]}

MORITA, K ^{[1
]}

KAMADA, K ^{[1
]}

MATAGA, N ^{[1
]}

机构：

[1] OSAKA UNIV, FAC ENGN SCI, DEPT CHEM, TOYONAKA, OSAKA 560, JAPAN

来源：

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN | 1990年 / 63卷 / 12期

关键词：

D O I：

10.1246/bcsj.63.3385

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Photoreduction processes of excited benzophenone (BP) by N,N-dimethylaniline (DMA) in acetonitrile solution were studied by means of picosecond-femtosecond laser photolysis and time resolved transient absorption spectroscopy as well as transient photoconductivity measurement. Proton transfer process in the triplet ion pair formed by electron transfer (ET) at encounter between 3BP* and DMA, competing with the ionic dissociation process was observed. It was clearly demonstrated that, in addition to the triplet ion pair, the ion pair produced by the excitation of the CT complex between BP and DMA formed in the ground state and that produced by ET reaction between 1BP* and DMA played important roles in the reaction processes of excited benzophenone. The behaviors of the three kinds of ion pairs were investigated in detail, leading to the elucidation of reaction mechanism of each ion pair. The reactivity characteristic of each kind of the ion pair and its relation to the structure of the ion pair were discussed.

引用

页码：3385 / 3397

页数：13

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