Spectroscopic investigation of water-soluble polyaniline copolymers

被引：87
作者：
Roy, BC
Gupta, MD
Bhoumik, L
Ray, JK
机构：
[1] N Dakota State Univ, Dept Chem, Fargo, ND 58105 USA
[2] Indian Inst Technol, Dept Chem, Kharagpur 721302, W Bengal, India
来源：
SYNTHETIC METALS | 2002年 / 130卷 / 01期
关键词：
polyaniline; water-soluble; solvatochromism; thermochromism; UV-VIS/NIR;
D O I：
10.1016/S0379-6779(02)00108-X
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The chemical copolymers of m-aminobenzene sulfonic acid with O-anisidine (POABSA) and O-toluidine (POTBSA) have been synthesized. Polymers are water soluble and self-doped. The peak in IR spectra at 1100-1160 cm(-1) shows the presence of SO3 group in the polymer backbone. Self-doped copolymers exhibit a strong and wide range of polaron absorption at 772-943 nm in m-cresol, due to the conformational changes induced by polymer solvent interaction. Copolymers also display a strong polaron transition in m-cresol with LiCl. Salt acts as a pseudo-doping agent and extends 'coil-like' conformations. The highest thermal activation is monitored at 70 degreesC, above that temperature (<100 degreesC) overcompensation of thermal activation effect is observed. The electrical conductivity of copolymers is low (10(-4) to 10(-5) S cm(-1)), caused by strong steric effect between SO3 and OMe/Me groups. (C) 2002 Elsevier Science B.V. All rights reserved.
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页码：27 / 33
页数：7
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