ELECTRON-PARAMAGNETIC-RESONANCE AND CONDUCTIVITY STUDIES AN POLY(M-TOLUIDINE) SALTS AND THEIR BASES

被引：21

作者：

ANAND, J ^{[1
]}

PALANIAPPAN, S ^{[1
]}

SATHYANARAYANA, DN ^{[1
]}

机构：

[1] INDIAN INST SCI,DEPT INORGAN & PHYS CHEM,BANGALORE 560012,KARNATAKA,INDIA

来源：

SYNTHETIC METALS | 1994年 / 66卷 / 02期

关键词：

CONDUCTIVITY; EPR; SPECTROSCOPY; POLY(M-TOLUIDINE);

D O I：

10.1016/0379-6779(94)90089-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Five different poly(m-toluidine) (PMT) salts were synthesized chemically using different protonic acids and their bases were obtained by dedoping the salts using aqueous NH4OH. The electron paramagnetic resonance (EPR) spectra of PMT salts and their bases were recorded at different temperatures. The results show a thermally activated dependence for PMT-HCl and a Curie-Weiss behaviour in the range 40 to 200 degrees C for the other salts. The EPR signal intensities of the PMT bases are temperature-independent except for PMT dedoped from CH3COOH which shows thermally activated paramagnetism. Ambient-temperature electrical conductivities were obtained by the two-probe method for PMT salts and bases. The results are consistent with polaron spins that are antiferromagnetically coupled. The migration of paramagnetic polarons along the polymer chain alone is not responsible for the charge transport. The effect of substituents on polyaniline is discussed.

引用

页码：129 / 134

页数：6

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