ESR study on Langmuir-Blodgett films of azobenzene-containing alkylpyridinium-tetracyanoquinodimethane 1:2 complexes

被引：2

作者：

Ikegami, K ^{[1
]}

Kuroda, S ^{[1
]}

Tachibana, H ^{[1
]}

Matsumoto, M ^{[1
]}

机构：

[1] NATL INST MAT & CHEM RES, HIGASHI KU, TSUKUBA, IBARAKI 305, JAPAN

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1996年 / 65卷 / 01期

关键词：

ESR; Langmuir-Blodgett film; organic thin film; conducting organic material; charge-transfer complex; azobenzene; TCNQ salt; spin susceptibility; ESR linewidth; one-dimensional Hubbard model;

D O I：

10.1143/JPSJ.65.237

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Langmuir-Blodgett films of several 1:2 charge-transfer complexes of azobenzene-containing alkylpyridinium and tetracyanoquinodimethane (TCNQ), which exhibit various conductivity-change phenomena upon UV and visible light irradiation, have been investigated by using the ESR technique. The in-situ illumination measurements of these films and the quantitative analyses of the obtained spectrum show the changes in the exchange couplings between the spins and suggest the structural change in the TCNQ columns. By adopting the one-dimensional Hubbard model with dimerization effect, we propose a conductivity-change mechanism in the system.

引用

页码：237 / 245

页数：9

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