Light induced switching of conductivity in AOT-isooctane-water microemulsions via photoreactions of solubilizates

被引：11

作者：

Wolff, T ^{[1
]}

Hegewald, H ^{[1
]}

机构：

[1] Tech Univ Dresden, Inst Phys Chem & Elektrochem, D-01062 Dresden, Germany

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2000年 / 164卷 / 2-3期

关键词：

conductivity; microemulsion; percolation; photodimerization; photocyclization;

D O I：

10.1016/S0927-7757(99)00364-7

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：

Small amounts of solubilized N-methyldiphenylamine or 9-hydroxymethylanthracene and their photoproducts (N-methylcarbazole and photodimers of 9-hydroxymethylanthracene, respectively) had specific influences on the percolation temperature (as revealed by the onset of conductivity) in monophasic microemulsions composed of AOT, isooctane, and water: both the solubilizates induce shifts of the temperature at which conductivity sets on and affect the temperature of the border to the upper two phase region, 9-hydroxymethylanthracene being more effective. UV-irradiation in both cases lead to a decrease of the percolation temperature by several degrees. Therefore conductivity (percolation) can be switched isothermally from zero up to 3 mS cm(-1) upon exposure of samples to UV light. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：279 / 285

页数：7

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