In situ Fourier transform infrared attenuated total reflection (FTIR-ATR) spectroscopic investigations on the base-acid transitions of different forms of polyaniline. Base-acid transition in the leucoemeraldine form

被引：47

作者：

Ping, Z ^{[1
]}

Nauer, GE ^{[1
]}

Neugebauer, H ^{[1
]}

Theiner, J ^{[1
]}

机构：

[1] UNIV VIENNA,INST PHYS CHEM,A-1090 VIENNA,AUSTRIA

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1997年 / 420卷 / 1-2期

关键词：

polyaniline; leucoemeraldine; in situ FTIR spectroscopy; conducting polymer; electrochemistry;

D O I：

10.1016/S0022-0728(96)04801-2

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Infrared spectroscopic studies on the fully reduced form of polyaniline are discussed in this work. Ex situ FTIR spectra measured in NaReO4 + HReO4 electrolytes with different pH values are presented, and the absorption bands are assigned to different vibrational modes. Additionally, a distinct picture of the base-acid transition is evaluated using in situ FTIR-ATR measurements in electrolytes containing the supporting salt NaReO4 + HReO4. The results demonstrate that in strong acidic media leucoemeraldine nitrogen atoms can be partly protonated. The protonation process starts in the range between pH = 2.5 and 3 and the intercalation of anions from the electrolyte into the polymer structure is determined semi-quantitatively.

引用

页码：301 / 306

页数：6

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