In Situ ESR/UV-vis-NIR and ATR-FTIR Spectroelectrochemical Studies on the p-Doping of Copolymers of 3-Methylthiophene and 3-Hexylthiophene

被引：19

作者：

Chazaro-Ruiz, Luis F. ^{[1
]}

Kellenberger, Andrea ^{[1
,2
]}

Dunsch, Lothar ^{[1
]}

机构：

[1] Leibniz Inst Festkorper & Werkstofforschung, Abt Elektrochem & Leitfahige Polymere, D-01069 Dresden, Germany

[2] Univ Politehn Timisoara, Fac Ind Chem & Environm Engn, RO-300006 Timisoara, Romania

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2009年 / 113卷 / 08期

关键词：

CHARGE-CARRIERS; CONDUCTING POLYMERS; OPTICAL-PROPERTIES; MOBILITIES; POLY(3-ALKYLTHIOPHENES); POLYTHIOPHENE; POLY(3-METHYLTHIOPHENE); POLARONS; FILMS; ELECTROPOLYMERIZATION;

D O I：

10.1021/jp806810r

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：

A combined spectroelectrochemical study by ESR/UV-vis-NIR as well as FTIR spectroscopy on the influence of the copolymer composition on the stabilization of charges upon electrochemical p-doping is presented. As compared to the parent homopolymers 3-hexylthiophene (3-HeTh) and 3-methylthiophene (3-MeTh) which seems to be irregular, FTIR studies of the copolymer of both monomers (copMeHeTh) point to a regioregular structure. The in situ ESR and UV-vis-NIR spectroelectrochemistry at higher doping levels of the polymeric materials proves bipolarons and polaron pairs as stable charged states in poly(3-hexylthiophene) as well as the copolymer copMeHeTh. During the p-doping of poly(3-methylthiophene) bipolarons are the dominating species at higher doping levels. It is demonstrated that only the simultaneous use of both the ESR and the UV-vis-NIR spectroscopy enables the differentiation of polarons (paramagnetic) and polaron pairs (diamagnetic) in a conducting polymer.

引用

页码：2310 / 2316

页数：7

共 35 条

[1] POLARONS, BIPOLARONS, AND SOLITONS IN CONDUCTING POLYMERS [J].