THE PHOTOREDUCTION OF METHYLVIOLOGEN VIA ELECTRON-TRANSFER FROM ALUMINOSILICATE ZEOLITES

被引：27

作者：

MCMANUS, HJD

FINEL, C

KEVAN, L

机构：

[1] Department of Chemistry, University of Houston, Houston

来源：

RADIATION PHYSICS AND CHEMISTRY | 1995年 / 45卷 / 05期

关键词：

D O I：

10.1016/0969-806X(94)00095-2

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：

The photoreduction yields of methylviologen and various alkylated homologues in zeolite-X, Y and A were determined at 77 K in the absence of any reducing counteranion. Upon irradiation at 77 K, dehydrated samples turned light blue and a single line ESR spectrum was observed with a g-factor identical to that of the methylviologen radical cation. Samples that were not dehydrated produced ESR spectra about 10% as intense as those that had the water removed. The photoreduction yield was largest in zeolite Y, less in zeolite X which has more cations and hence more crowding in the cages, and very small in zeolite A which has much smaller cages. The electron donor in these systems is believed to be the anionic aluminosilicate framework of the host zeolite.

引用

页码：761 / 764

页数：4

共 24 条

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