A spectroscopic study of diphenylmethyl radicals and diphenylmethyl carbocations stabilized by zeolites

被引：25

作者：

Jockusch, S ^{[1
]}

Hirano, T ^{[1
]}

Liu, ZQ ^{[1
]}

Turro, NJ ^{[1
]}

机构：

[1] Columbia Univ, Dept Chem, New York, NY 10027 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2000年 / 104卷 / 06期

关键词：

D O I：

10.1021/jp992978s

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：

Photolysis of tetraphenylacetone on LZ-105 zeolites leads to diphenylmethyl radicals. Diffuse reflectance laser flash photolysis showed that most of the radicals decayed in the microsecond time scale. However, approximately 2-7% of the diphenylmethyl radicals remained as persistent radicals probably inside the zeolite channels with lifetimes of the order of weeks. The persistent radicals were detected by steady-state diffuse reflectance and steady-stale and time-resolved fluorescence spectroscopy. In addition to the diphenylmethyl radicals, stable diphenylmethyl carbocations were formed and were detected by steady-state diffuse reflectance and steady-state and time-resolved fluorescence spectroscopy.

引用

页码：1212 / 1216

页数：5

共 32 条

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