Heteroaromatic azo-sulfonamide monolayers: isomerisation and photocurrent generation

被引:4
作者
Kucharski, S [1 ]
Janik, R [1 ]
Szkodzinska, J [1 ]
机构
[1] Wroclaw Tech Univ, Inst Organ & Polymer Technol, PL-50370 Wroclaw, Poland
关键词
azo-sulfonamides; trans-cis isomerisation; Langmuir-Blodgett films on ITO; photocurrent generation;
D O I
10.1016/S0927-7757(01)00967-0
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
Trans-cis isomerisation of the azo-sulfonamide derivatives: 4-(N-methyl-N-n-dodecyl)amino-4'-(N-thiazol-2-yl)sulfonamidoazobenzene, 4-(N-methyl-N-n-dodecyl)amino-4'-(N-pyrimidin-2-yl)sulfonamidoazobenzene, and 4-(N-methyl-N-n-dodecyl)amino-4'-[N-(2-methyl)isoxazol-2-yl]sulfonamidoazobenzene and photocurrent generation in Langmuir-Blodgett (LB) films was investigated. The isomerisation took place on illumination with a light beam corresponding to the absorption band, The reverse cis-trans isomerisation proceeded as a thermal relaxation. It was observed that the LB films deposited during illumination of the trough were more effective in this photoreaction. The LB structures deposited onto conductive ITO glass were able to generate photocurrent in a standard three-electrode system. The photocurrent intensity was in linear relationship with bias voltage in the range from 0 to -0.35 V and in best conditions it reached 160 nA cm(-2). (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:359 / 365
页数:7
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