Preparation and characterization of poly(5-aminoindole) by using electrochemical quartz crystal nanobalance technique

Balázs Broda, György Inzelt

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The electrochemical quartz crystal nanobalance (EQCN) was employed to study the electropolymerization of 5-aminoindole on platinum electrodes in acidic media. Potentiostatic or potential cycling electrooxidation of 5-aminoindole below 0.62 V vs. SCE leads to the formation of uniform, yellow, electrochemically active polymeric films. A scheme of the redox transformations of poly(5-aminoindole) which involves protonation-deprotonation steps accompanying the electron transfer is suggested. At higher positive potentials, further oxidation takes place resulting in different blue-purple, indigo-type materials which remain attached to the metal surface but show decreased or no redox activity.

Original languageEnglish
Pages (from-to)357-365
Number of pages9
JournalActa Chimica Slovenica
Issue number2
Publication statusPublished - 2014



  • 5-aminoindole
  • Electrochemical quartz crystal nanobalance
  • Electropolymerization
  • Overoxidation
  • Redox behavior

ASJC Scopus subject areas

  • Chemistry(all)

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