The formation of oligomers in the electrolyte upon polymerization of pyrrole

被引：35

作者：

Appel, G

Schmeisser, D

Bauer, J

Bauer, M

Egelhaaf, HJ

Oelkrug, D

机构：

[1] Tech Univ Cottbus, D-03013 Cottbus, Germany

[2] Fraunhofer Inst Zuverlassigkeit & Mikrointegrat, D-14513 Teltow, Germany

[3] Univ Tubingen, Inst Phys & Theoret Chem, D-72076 Tubingen, Germany

来源：

SYNTHETIC METALS | 1999年 / 99卷 / 01期

关键词：

polypyrrole; polymerization mechanism; oligomers; SEC; optical spectroscopy;

D O I：

10.1016/S0379-6779(98)00200-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Pyrrole was polymerized by electrochemical and chemical oxidation of a solution of pyrrole and p-toluene sulfonic acid in acetonitrile. We have investigated the components formed within that electrolyte solution during the polymerization. Both, UV-VIS spectroscopy and size exclusion chromatography give evidence that pyrrole oligomers nP (n less than or equal to 30) are formed in the solutions during the polymerization process. A model is proposed in which these oligomers act as intermediates of the polymerization reaction. Within that model the deviations from Faradayic behaviour at elevated current densities are explained. It also rationalizes the fact that polymer films with completely different properties can be realized by varying the experimental parameters. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：69 / 77

页数：9

共 25 条

[1] Highly conductive polypyrrole films on non-conductive substrates [J].