A magnetic susceptibility study of emeraldine base polyaniline

被引：33

作者：

Kahol, PK ^{[1
]}

Raghunathan, A ^{[1
]}

McCormick, BJ ^{[1
]}

机构：

[1] Wichita State Univ, Dept Phys, Wichita, KS 67260 USA

来源：

SYNTHETIC METALS | 2004年 / 140卷 / 2-3期

关键词：

magnetic susceptibility study; emeraldine base polyaniline; polyaniline;

D O I：

10.1016/S0379-6779(03)00371-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Paramagnetic spins are found even in carefully synthesized samples of emeraldine base polyaniline. We report here magnetic susceptibility data up to a temperature of 475 K on a number of emeraldine base samples that were synthesized at different oxidant to monomer ratios. All the samples, although electrically insulating, show the presence of Pauli-like susceptibility. A simple albeit physically realistic model involving spin-pairs is shown to lead to such a dependence on temperature. The analysis of the data indicates that polarons in emeraldine base are created in pairs and that the intra-pair interactions encompass a broad distribution of antiferromagnetic exchange couplings. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：261 / 267

页数：7

共 24 条

[1]

[Anonymous], 1997, HDB CONDUCTIVE ORGAN

[2] EPR of mesoscale polyanilines [J].