COMPARISON OF CHEMICALLY AND ELECTROCHEMICALLY PREPARED POLYANILINE FILMS .2. OPTICAL-PROPERTIES

被引：38

作者：

CHINN, D

DUBOW, J

LI, J

JANATA, J

JOSOWICZ, M

机构：

[1] PACIFIC NW LAB, CTR MAT & CHEM SCI, RICHLAND, WA 99352 USA

[2] UNIV UTAH, DEPT MAT SCI & ENGN, SALT LAKE CITY, UT 84112 USA

来源：

CHEMISTRY OF MATERIALS | 1995年 / 7卷 / 08期

关键词：

D O I：

10.1021/cm00056a017

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：

Relaxation phenomena in thin polyaniline films synthesized chemically and electrochemically are investigated by UV-vis and IR spectroscopy. It is shown that the relaxation process carried out from the electrochemically oxidized or electrochemically reduced states of the polyaniline always proceeds toward the emeraldine state. The relaxation process in acid is governed by disproportionation and formation of semiquinone radicals. The changes in the population density of the polaronic states within the polaronic band allows determination of the change in the oxidation state and consequently the change in the position of the Fermi energy level. The formation of polaronic states is ascertained by diffusion of ions from or into the polyaniline matrix in solution and within the polymer in air.

引用

页码：1510 / 1518

页数：9

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