Application of simultaneous monitoring of the in situ impedance and optical changes on the redox transformation of two polythiophenes

Direct evidence for their non-identical conductance-charge carrier correlation

Péter S. Tóth, Emese Peintler-Kriván, C. Visy

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The redox transformation of poly(3,4-ethylenedioxythiophene) (PEDOT) and poly(3-octylthiophene) (POT) has been studied and compared by combining simultaneous in situ UV-Vis-NIR spectroelectrochemical and ac impedance techniques. Simultaneous changes of the conductance and the rate of the absorbance increase/decrease of the optically different charge carriers in the selfsame film gave direct and unquestionable evidence for that in PEDOT synthesised in aqueous solution the mono-cationic, while in POT the di-cationic segments are primarily responsible for the development of the name-giving property of conducting polymers. This difference in the role of the charge carriers could be partially observed between PEDOTs prepared in aqueous and acetonitrile (AN) solutions.

Original languageEnglish
Pages (from-to)958-961
Number of pages4
JournalElectrochemistry Communications
Volume12
Issue number7
DOIs
Publication statusPublished - Jul 2010

Fingerprint

Charge carriers
Monitoring
Conducting polymers
Polymers
Acetonitrile
Oxidation-Reduction
poly(3,4-ethylene dioxythiophene)
poly(3-octylthiophene)
polythiophene
acetonitrile

Keywords

  • Charge carriers
  • Conducting polymers
  • In situ impedance
  • In situ UV-Vis-NIR spectroscopy
  • Redox transformation

ASJC Scopus subject areas

  • Electrochemistry

Cite this

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abstract = "The redox transformation of poly(3,4-ethylenedioxythiophene) (PEDOT) and poly(3-octylthiophene) (POT) has been studied and compared by combining simultaneous in situ UV-Vis-NIR spectroelectrochemical and ac impedance techniques. Simultaneous changes of the conductance and the rate of the absorbance increase/decrease of the optically different charge carriers in the selfsame film gave direct and unquestionable evidence for that in PEDOT synthesised in aqueous solution the mono-cationic, while in POT the di-cationic segments are primarily responsible for the development of the name-giving property of conducting polymers. This difference in the role of the charge carriers could be partially observed between PEDOTs prepared in aqueous and acetonitrile (AN) solutions.",
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T1 - Application of simultaneous monitoring of the in situ impedance and optical changes on the redox transformation of two polythiophenes

T2 - Direct evidence for their non-identical conductance-charge carrier correlation

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AU - Peintler-Kriván, Emese

AU - Visy, C.

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N2 - The redox transformation of poly(3,4-ethylenedioxythiophene) (PEDOT) and poly(3-octylthiophene) (POT) has been studied and compared by combining simultaneous in situ UV-Vis-NIR spectroelectrochemical and ac impedance techniques. Simultaneous changes of the conductance and the rate of the absorbance increase/decrease of the optically different charge carriers in the selfsame film gave direct and unquestionable evidence for that in PEDOT synthesised in aqueous solution the mono-cationic, while in POT the di-cationic segments are primarily responsible for the development of the name-giving property of conducting polymers. This difference in the role of the charge carriers could be partially observed between PEDOTs prepared in aqueous and acetonitrile (AN) solutions.

AB - The redox transformation of poly(3,4-ethylenedioxythiophene) (PEDOT) and poly(3-octylthiophene) (POT) has been studied and compared by combining simultaneous in situ UV-Vis-NIR spectroelectrochemical and ac impedance techniques. Simultaneous changes of the conductance and the rate of the absorbance increase/decrease of the optically different charge carriers in the selfsame film gave direct and unquestionable evidence for that in PEDOT synthesised in aqueous solution the mono-cationic, while in POT the di-cationic segments are primarily responsible for the development of the name-giving property of conducting polymers. This difference in the role of the charge carriers could be partially observed between PEDOTs prepared in aqueous and acetonitrile (AN) solutions.

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