Structural changes in polyaniline near the middle oxidation peak studied by in situ Raman spectroelectrochemistry

被引：41
|
作者：
Moravkova, Zuzana [1 ,2 ]
Dmitrieva, Evgenia [2 ]
机构：
[1] Acad Sci Czech Republ, Inst Macromol Chem, Heyrovsky Sq 2, Prague 16206 6, Czech Republic
[2] Leibniz Inst Solid State & Mat Res IFW Dresden, Ctr Spectroelectrochem, Helmholtzstr 20, D-01069 Dresden, Germany
来源：
JOURNAL OF RAMAN SPECTROSCOPY | 2017年 / 48卷 / 09期
关键词：
polyaniline; resonance Raman spectroelectrochemistry; polaron; middle oxidation peak; MODEL-COMPOUND; SULFURIC-ACID; SPECTROSCOPY; DEGRADATION; ANILINE; EMERALDINE; POLYMERS; SPECTRA; DIMER; FORM;
D O I：
10.1002/jrs.5197
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
The transitions near the middle oxidation peak of polyaniline were studied by resonance Raman spectroelectrochemistry. Localization of polarons was observed in the potential region between first and middle oxidation peaks and connected with the coupling of the polarons into pairs - specific Raman bands were connected with separated polarons, pairs of polarons, and emeraldine states in general. In addition, a connection of the middle oxidation peak in the cyclic voltammetry of polyaniline with hydroquinone/benzoquinone defect redox transition was confirmed. These findings allow more precise determination of oxidation, protonation, and degradation level of polyaniline by resonance Raman spectroscopy. Copyright (c) 2017 John Wiley & Sons, Ltd.
引用
收藏
页码：1229 / 1234
页数：6
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