CIDEP AFTER LASER FLASH IRRADIATION OF BENZIL IN 2-PROPANOL - ELECTRON-SPIN POLARIZATION BY THE RADICAL-TRIPLET PAIR MECHANISM

被引：42

作者：

BLATTLER, C

PAUL, H

机构：

[1] Physikalisch-Chemisches Institut, Universität Zürich, Zürich

来源：

RESEARCH ON CHEMICAL INTERMEDIATES | 1991年 / 16卷 / 03期

关键词：

D O I：

10.1163/156856791X00264

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Benzil ketyl radicals are generated by laser flash irradiation of benzil in 2-propanol at T = -50-degrees-C and are observed by time-resolved ESR spectroscopy. Their electron spin polorization is found to consist of a fast and slowly rising emissive component. The fast component is due to polarized ketyl radicals formed by a two-photon process from an excited triplet state. The slow one is attributed to ketyl radicals which are generated by a slow photoreduction of benzil in its lowest triplet state. Their emissive polarization stems predominantly from the radical-triplet pair mechanism (RTPM). Rate constants of the relevant processes are determined.

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页码：201 / 211

页数：11

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