Unusual electrochemical response of oligoalkylthiophene films: Involvement of bipolarons

Hongfang Liu, Yutaka Harima, Rahul Patil, Xiaoqing Jiang, Yousuke Ooyama, Kazuo Takimiya, Tetsuo Otsubo

Research output: Contribution to journalArticlepeer-review


Cyclic voltammograms of -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 suggests 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.

Original languageEnglish
Pages (from-to)367-372
Number of pages6
JournalMolecular crystals and liquid crystals
Issue number1
Publication statusPublished - 2006 Oct 1
Externally publishedYes


  • Bipolarons
  • Conformational change
  • Oligoalkylthiophene
  • φ-conjugation

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics


Dive into the research topics of 'Unusual electrochemical response of oligoalkylthiophene films: Involvement of bipolarons'. Together they form a unique fingerprint.

Cite this