Electrical and magnetic properties of electro-oxidative polymerized poly(tris(thienylphenyl)amine)s

被引：16

作者：

Cho, JS

Uchida, K

Yoshioka, N

Yamamoto, K ^{[1
]}

机构：

[1] Keio Univ, KAST, Yokohama, Kanagawa 2238522, Japan

[2] Keio Univ, Fac Sci & Technol, Dept Chem, Yokohama, Kanagawa 2238522, Japan

[3] Keio Univ, Fac Sci & Technol, Dept Appl Chem, Yokohama, Kanagawa 2238522, Japan

来源：

SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS | 2004年 / 5卷 / 5-6期

关键词：

poly(thienylphenyl)amine; dendritic polymer; magnetic property; spin concentration;

D O I：

10.1016/j.stam.2004.03.006

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Electro-oxidative polymerized poly(tris(thienylphenyl)amine)s, which have the hyperbranched (dendritic) structure (PTPA) and linear type (PMeTPA), were investigated for their electrical and magnetic properties. The conductivity PTPA showed was almost one order higher than that of PMeTPA. From the solid state ESR measurements of the polymers, observation of ESR signal at g = 2.0027 and 2.0030 indicated the formation of a triphenylamine cation radical. The normalized magnetization plots (M/Ms) for PTPA and PMeTPA are close to the theoretical Brillouin curves for S = 1, indicating a magnetic interaction between the spin centers in PMeTPA. The spin concentrations determined by the M-S values of PTPA and PMeTPA were 7.3-7.4 and 1.3-1.4%, respectively. This large difference in the spin concentration of the polymers according to the structure resulted from a different spin conformation by the radical structure. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：697 / 701

页数：5

共 25 条

[1] Light harvesting and energy transfer in laser-dye-labeled poly(aryl ether) dendrimers [J].