Electrosynthesis of poly(para)phenylene in an ionic liquid: Cyclic voltammetry and in situ STM/tunnelling spectroscopy studies

被引：31

作者：

Carstens, T. ^{[1
,2
]}

El Abedin, S. Zein ^{[1
]}

Endres, F. ^{[1
]}

机构：

[1] Tech Univ Clausthal, Fac Nat & Mat Sci, D-38678 Clausthal Zellerfeld, Germany

[2] Natl Res Ctr, Electrchem & Corros Lab, Cairo, Egypt

来源：

CHEMPHYSCHEM | 2008年 / 9卷 / 03期

关键词：

cyclic voltammetry; ionic liquids; IR spectroscopy; polymerisation; STM microscopy;

D O I：

10.1002/cphc.200700727

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：

The electropolymerization of benzene in the air and water-stable ionic liquid 1-hexyl-3-methylimidazolium tris(pentafluoroethyl)tri-fluorophosphate (HMIm)FAP is investigated. The study comprises cyclic voltammetry, IR and in situ STM/tunnelling spectroscopy measurements. The IR results indicate that poly(para)phenylene is the end product of the electropolymerization of benzene in the empolyed ionic liquid. The resulting conjugation lengths of the product fall between 19 and 21. A polymer reference electrode is used successfully for the electrochemical polymerization of benzene. The first in situ STM results show that the electropolymerization of benzene in the ionic liquid can be probed on the nano-scale and the band gap of the prepared polymer can be determined. The electrodeposited polymer film obtained at a constant potential of 1.0 V vs PPP (polyparaphenylene) exhibits a band gap of 2.9 +/- 0.2 eV.

引用

页码：439 / 444

页数：6

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