In situ resonant Raman and optical investigations of p-doped poly (p-phenylene vinylene)

M. Baïtoul, J. Wéry, J. P. Buisson, G. Arbuckle, H. Shah, S. Lefrant, M. Hamdoume

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Abstract

In this paper, we present spectroscopy studies of poly (p-phenylene vinylene) p-doped by chemical or electrochemical ways with SO3 - and BF4 -, respectively. Since very few experimental data are available for in situ Raman studies of electrochemically doped samples, we have essentially used this technique in different resonance conditions (resonance Raman scattering (RRS)) to carry out our investigations using different excitation wavelengths. Several modifications in the Raman spectra of doped PPV compared to neutral PPV are analyzed and interpreted by the coexistence of polaronic and bipolaronic species in the sample. These results are illustrated in particular by gradual shifts in the frequency of carbon-carbon stretching vibrations, explained in terms of a quinoid character growing at the expense of the benzenoid one when the doping level is increased. (C) 2000 Elsevier Science Ltd. All rights reserved.

Original languageEnglish (US)
Pages (from-to)6955-6964
Number of pages10
JournalPolymer
Volume41
Issue number18
DOIs
StatePublished - Aug 2000

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

Keywords

  • Electrochemical studies
  • Optical spectroscopy
  • Raman spectroscopy

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