In situ Fourier transform infrared attenuated total reflection (FTIR-ATR) spectroscopic investigations on the base-acid transitions of leucoemeraldine

被引：36

作者：

Ping, Z ^{[1
]}

Nauer, GE ^{[1
]}

Neugebauer, H ^{[1
]}

Theiner, J ^{[1
]}

Neckel, A ^{[1
]}

机构：

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

来源：

ELECTROCHIMICA ACTA | 1997年 / 42卷 / 11期

关键词：

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

D O I：

10.1016/S0013-4686(96)00368-4

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Leucoemeraldine, the reduced form of the polyaniline, was obtained by electrochemical polymerization. Extensive infrared spectroscopic studies 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 salts KPF6/HPF6, NaClO4/HC1O(4) and NaReO4/HReO4. The results demonstrate that in strong acidic media leucoemeraldine nitrogen atoms can be partly protonated. The protonation process starts in the pH-range 2.5 and 3 in the intercalation of anions from the electrolyte into the polymer structure is determined semi-quantitatively. (C) 1997 Elsevier Science Ltd.

引用

页码：1693 / 1700

页数：8

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