REDOX PROCESSES IN POLYANILINE THIN-FILM STUDIED BY OPTICAL MULTICHANNEL ANALYSIS

被引:12
作者
BERNARD, MC
GOFF, AHL
机构
[1] UPR 15 du CNRS ‘Physique des Liquides et Electrochimie’, Universite Pierre et Marie Curie, Paris, F-75252, Tour 22
关键词
D O I
10.1002/sia.740190109
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
Optical multichannel analysis (OMA) was used to follow the kinetics of colour changes in electrochromic polyaniline film when the latter are polarized in an electrolytic medium at different potentials. These colour changes, which are related to the transition from one polymer form to another, are very fast. OMA also allowed us to obtain an apparent value of the film absorption coefficient. In the investigated range (300-800 nm), several absorption phenomena can be displayed which are characteristic of the different polymer forms. Two electrolytic media (1 M HCl and 1 M H2SO4) were compared to investigate the role played by the size of the inserted counter-ion. The overall results allow us to estimate the practical possibility of using polyaniline in electrochromic devices.
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页码:27 / 32
页数:6
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