Magnetic properties in polypyrrole doped by series of dopants

被引：21

作者：

Mizoguchi, K ^{[1
]}

Kachi, N ^{[1
]}

Sakamoto, H ^{[1
]}

Kume, K ^{[1
]}

Yoshioka, K ^{[1
]}

Masubuchi, S ^{[1
]}

Kazama, S ^{[1
]}

机构：

[1] UNIV TOKYO,DEPT PHYS,BUNKYO KU,TOKYO 112,JAPAN

来源：

SYNTHETIC METALS | 1997年 / 84卷 / 1-3期

关键词：

electron spin resonance; magnetic measurements; polypyrrole and derivatives;

D O I：

10.1016/S0379-6779(96)04111-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetic susceptibility and ESR linewidth are measured as a function of temperature in polypyrrole (PPy) doped with PF6-, AsF6-, ClO4-, BF4-, ToS(-). Spin susceptibility by Schumacher-Slichter (ESR NMR) technique shows both the temperature independent Pauli term ranging from 0.7 to 1.4x10(-5) emu/mol-ring and the Curie term of 1 spin per 600 similar to 1500 rings, which is consistent with that obtained by SQUID measurement in the same sample. The temperature dependence of ESR linewidth is ascribed to the Elliott mechanism typical for the metallic electron spins, increasing monotonically with the temperature. This interpretation is also consistent with the ESR linewidth in polythiophene doped with ClO4- and AsF6-. Therefore, both the susceptibility and the ESR linewidth demonstrate the PPy's doped with several dopants to have a metallic electronic state.

引用

页码：695 / 698

页数：4

共 18 条

[1] ELECTRONIC-STRUCTURE OF POLYPYRROLE FILMS [J].