REDOX PHOTOCHROMISM IN FILMS OF VIOLOGENS AND RELATED-COMPOUNDS BEARING LONG-CHAIN ALKYL-GROUPS

被引：18

作者：

KAMOGAWA, H

ONO, T

机构：

[1] Department of Applied Chemistry, Yamanashi University, Takeda 4

来源：

CHEMISTRY OF MATERIALS | 1991年 / 3卷 / 06期

关键词：

D O I：

10.1021/cm00018a015

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：

1,1'-Bis(benzyl or p-methylbenzyl)-4,4'-bipyridinium and trans-4,4'-vinylenebis(1-benzylpyridinium) bis-(p-alkylbenzenesulfonate)s bearing long-chain alkyl groups (viologen Ia,b), prepared from their respective dichlorides by the anion-exchange reaction, were sandwiched between two glass plates by melting to afford thin transparent and mainly isotropic films. These almost colorless or pale yellow films developed intense visible colors by near-UV irradiation, which bleached upon heating (photochromism). This behavior is considered to be due to reversible redox reactions consisting of the one-electron transfer to viologen Ia,b dication from the counteranion by the photon mode (color development) and vice versa by the heat mode (bleaching).

引用

页码：1020 / 1023

页数：4

共 22 条

[1] ISOLATION AND OXIDATION REDUCTION OF METHYLVIOLOGEN CATION RADICALS - NOVEL DISPROPORTIONATION IN CHARGE-TRANSFER SALTS BY X-RAY CRYSTALLOGRAPHY [J].