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Durham University

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Publication details for Professor Andy Monkman

Boyer, M, Quillard, S, Louarn, G, Lefrant, S, Rebourt, E & Monkman, AP (1997). Oxidized model compounds of polyaniline studied by resonance Raman spectroscopy. Synthetic Metals 84(1-3): 787-788.
  • Publication type: Journal Article
  • ISSN/ISBN: 0379-6779
  • Keywords: polyaniline; model compounds; resonance Raman spectroscopy; in situ electrochemical spectroscopy

Author(s) from Durham

Abstract

The emeraldine salt structure, the only conducting form of polyaniline
is not well-known. This is why, we have carried out resonance Raman
spectra (RRS) on one of these models compounds oxidized
electrochemically in-situ in order to elucidate the electronic
structure of this polymer partially oxidized in an acidic medium. A
phenyl end-capped dimer of polyaniline, N,N'
diphenyl-p-phenylenediamine (named PCD), was selected. This dimer has
been electrochemically oxidized in acetonitrile containing 0,2 M
tetrabutylammonium tetrafluoroborate as ground salt and 0.1 M diphenyl
phosphate as acid. The choice of laser excitation wavelength was fixed
by UV-Vis absorption measurements on PCD in the acidic medium. Numerous
similarities between emeraldine salt and radical species created were
observed and are discussed in this paper.