X-RAY PHOTOELECTRON-SPECTROSCOPY OF NEW SOLUBLE POLYANILINE PERCHLORATES - EVIDENCE FOR THE COEXISTENCE OF POLARONS AND BIPOLARONS

被引:12
作者
INOUE, MB [1 ]
NEBESNY, KW [1 ]
FERNANDO, Q [1 ]
INOUE, M [1 ]
机构
[1] UNIV SONORA,CTR INVEST POLIMEROS & MAT,HERMOSILLO,SONORA,MEXICO
关键词
POLYANILINE; X-RAY PHOTOELECTRON SPECTROSCOPY;
D O I
10.1039/jm9910100213
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
An X-ray photoelectron spectroscopic (XPS) study was carried out on the following soluble polyaniline perchlorates and polyaniline base: (A) a perchlorate prepared in a single step by the use of copper(II) perchlorate as an oxidative coupling agent; (B) a polyemeraldine base obtained by treating perchlorate A; and (C) a perchlorate obtained by the protonation of the polyemeraldine base. The N 1s XPS peak of perchlorate C exhibited a more intense envelope on the higher binding energy side than the N 1s peak of perchlorate A. The difference spectrum, with a peak maximum at 402.0 eV, can be assigned to the bipolaron nitrogen in perchlorate C, when referred to the previous spectroscopic study of the two perchlorates. The area of the bipolaron peak was 5% of the whole peak of perchlorate C, although the charged nitrogen was 30% of the total nitrogen. Polarons are the major charge carriers in the two conducting polyaniline perchlorates, and perchlorate C contains bipolarons (in 5% of the total nitrogen) that coexist with polarons.
引用
收藏
页码:213 / 216
页数:4
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