Electrochemical process of formation of an insulating polypyrrole film

Tetsuya Osaka, Toshiyuki Momma, Shin ichi Komaba, Himeko Kanagawa, Sadako Nakamura

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

Insulating and electroinactive polypyrrole (PPy(NaOH)) film can be synthesized by electropolymerization from an NAOH aqueous solution containing pyrrole at a highly positive potential. The synthesis of this electroinactive PPy(NaOH) was investigated using in situ UV and X-ray photoelectron spectroscopy, and was compared with the irreversible oxidation ("overoxidation") of electroactive PPy under a highly positive potential. Overoxidation made the PPy inactive. However, the formation of PPy (NaOH) started above 0.5 V vs. Ag/AgCl, and the "overoxidation" began simultaneously in the polymerizing solution. Overoxidation with nucleophilic hydroxide ions caused a structural change in the PPy molecule, which destroyed the original π-conjugated system.

Original languageEnglish
Pages (from-to)201-207
Number of pages7
JournalJournal of Electroanalytical Chemistry
Volume372
Issue number1-2
DOIs
Publication statusPublished - 1994 Jul 8

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Polypyrroles
Pyrroles
Electropolymerization
X ray photoelectron spectroscopy
Molecules
Ions
polypyrrole
hydroxide ion

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

Cite this

Electrochemical process of formation of an insulating polypyrrole film. / Osaka, Tetsuya; Momma, Toshiyuki; Komaba, Shin ichi; Kanagawa, Himeko; Nakamura, Sadako.

In: Journal of Electroanalytical Chemistry, Vol. 372, No. 1-2, 08.07.1994, p. 201-207.

Research output: Contribution to journalArticle

Osaka, Tetsuya ; Momma, Toshiyuki ; Komaba, Shin ichi ; Kanagawa, Himeko ; Nakamura, Sadako. / Electrochemical process of formation of an insulating polypyrrole film. In: Journal of Electroanalytical Chemistry. 1994 ; Vol. 372, No. 1-2. pp. 201-207.
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