Unusual electrochemical response of oligoalkylthiophene films : Involvement of bipolarons

Molecular Crystals and Liquid Crystals Volume 455 Issue 1 Page 367-372 published_at 2006-10-01
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Title ( eng )
Unusual electrochemical response of oligoalkylthiophene films : Involvement of bipolarons
Creator
Liu Hongfang
Patil Rahul
Jiang Xiaoqing
Takimiya Kazuo
Otsubo Tetsuo
Source Title
Molecular Crystals and Liquid Crystals
Volume 455
Issue 1
Start Page 367
End Page 372
Abstract
Cyclic voltammograms of π-conjugated oligoalkylthiophene (13T) films are found to show two oxidation peaks during the 1st potential cycling up to 0.8 V. In the subsequent cycles, however, the 2nd oxidation peak disappears completely and the 1st peak shifts by ca. 0.1 V to the cathodic direction. This finding along with spectroscopic measurements of 13T film before and after electrochemical stimulus suggest first that two different phases to be oxidized at separate potentials coexist in a pristine 13T film and second that one phase can be switched to the other by being oxidized to generate bipolarons.
Keywords
oligoalkylthiophene
π-conjugation
conformational change
bipolarons
NDC
Chemical technology [ 570 ]
Language
eng
Resource Type journal article
Publisher
Taylor and Francis
Date of Issued 2006-10-01
Rights
Copyright (c) 2006 Taylor and Francis This is an electronic version of an article published in "Molecular Crystals and Liquid Crystals Vol.455 No.1 pp.367-372" Molecular Crystals and Liquid Crystals is available at: http://dx.doi.org/10.1080/15421400600698972
Publish Type Author’s Original
Access Rights open access
Source Identifier
[NCID] AA11836169
[ISSN] 1542-1406
[DOI] 10.1080/15421400600698972
[DOI] http://dx.doi.org/10.1080/15421400600698972