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首页> 外文期刊>Journal of Electroanalytical Chemistry: An International Journal Devoted to All Aspects of Electrode Kinetics, Interfacial Structure, Properties of Electrolytes, Colloid and Biological Electrochemistry >Investigation on the redox mechanism of polyaniline film in acid solution by in situ rapid-scan time-resolved infrared spectroelectrochemistry
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Investigation on the redox mechanism of polyaniline film in acid solution by in situ rapid-scan time-resolved infrared spectroelectrochemistry

机译：原位快速扫描时间分辨红外光谱电化学研究酸性溶液中聚苯胺膜的氧化还原机理

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摘要

The redox mechanism of polyaniline (PANI) film in acid solution was studied by in situ rapid-scan time-resolved infrared spectroelectrochemistry (RS-TR-FTIRS) method. In the potential rang between -0.29 and 0.91 V. there are four pairs of redox peaks. These four pairs of redox peaks were minutely investigated by cyclic voltammetry (CV) and in-situ infrared spectroelectrochemistry. The results illustrated that the first pair of redox peaks are according to oxidation of the secondary amines in the middle of molecular PANI chain, the second pair of redox peaks are according to oxidation of terminal primary amines, the third pair of redox peaks are according to oxidation of terminal hydroxyl groups, the forth pair of redox peaks are according to oxidation of the polaronic PANI to the bipolaronic PANI. The bipolaronic PANI completely turns to quinoid structure with highly conjugated by deprotonation when the electrode potential was higher than 0.71 V. Meanwhile, the hydrogen bonding between the oxidation products of PANI and water molecules disappeared. (C) 2015 Elsevier B.V. All rights reserved.
机译：采用原位快速扫描时间分辨红外光谱电化学（RS-TR-FTIRS）方法研究了酸性溶液中聚苯胺（PANI）薄膜的氧化还原机理。电位范围在-0.29和0.91 V之间。有四对氧化还原峰。通过循环伏安法（CV）和原位红外光谱电化学对这四对氧化还原峰进行了细致的研究。结果表明，第一对氧化还原峰是根据分子PANI链中间的仲胺的氧化，第二对氧化还原峰是根据末端伯胺的氧化，第三对氧化还原峰是根据在末端羟基被氧化时，第四对氧化还原峰是根据极化子PANI氧化为双极化子PANI的。当电极电位高于0.71 V时，双极性PANI完全通过去质子转变成高度共轭的醌型结构。同时，PANI氧化产物与水分子之间的氢键消失。 （C）2015 Elsevier B.V.保留所有权利。

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