硫酸水溶液中聚苯胺的两种极化子

摘要/Abstract

摘要： 　应用自设计现场ESR电解池测量不同电势下的聚苯胺电导率,得到了高信/噪比的ESR谱图.谱线分解发现,在硫酸水溶液中聚苯胺生长的早期阶段存在两种极化子,根据这两种成分的ESR峰宽随电极电势的变化以及它和电导的关联分析,分别被指认为聚苯胺中有序区域和无序区域的极化子.随着掺杂程度的增大,两种极化子都是载流子,同样经历了由Curie自旋到Pauli自旋的转变.这一推论得到ESR饱和实验数据的支持.

关键词: 电子自旋共振, 极化子, 自旋运动性, 聚苯胺

Abstract: Simultaneous electrochemistry electron spin resonance (ESR) conductance measurements were carried out on electropolymerized polyaniline and ESR spectra were obtained with high signal/noise ratio. Spectral simulation revealed that in the early stage of polymerization, there were two kinds of polarons. According to the potential dependence of the ESR line width and the corresponding conductivitychange of the polymer, the two polarons are thought to be in ordered and disordered domains, respectively. With increasing doping level, the two polarons underwent similar transfer from Curie spin to Pauli spin and both polarons were charge carriers in the conducting polymer. This deduction was further supported by ESR saturation measurement.

Key words: Electron spin resonance, Polaron, Spin mobility, Polyaniline

中图分类号:

O646

周琴,庄林,陆君涛. 硫酸水溶液中聚苯胺的两种极化子[J]. 电化学（中英文）, 2004, 10(2): 121-126.

ZHOU Qin,ZHUANG Lin~*, LU Jun-tao . Two Kinds of PolaronsObservedin Polyanilinein Aqueous H_2SO_4[J]. Journal of Electrochemistry, 2004, 10(2): 121-126.

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https://electrochem.xmu.edu.cn/CN/Y2004/V10/I2/121

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