Characterization of poly (N-alkylanilines) by Raman spectroscopy

M Blomquist, Tom Lindfors, Ari Ivaska

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    Thin films of poly(N-alkylaniline) were synthesized in acidic aqueous solution and in mixtures of aqueous and organic solvents. The polymer films (alkyl = methyl, ethyl, propyl and butyl) were characterized by Raman spectroscopy with the excitation wavelengths of 514.5, 632.8 and 780 nm. The main Raman bands have been characterized for the leucoemeraldine, emeraldine and pernigraniline oxidation states between -0.2 and 0.8 V (vs. Ag vertical bar AgCl). This fundamental study shows that the structure of the half-oxidized emeraldine form contains quinoid units, which supports the commonly accepted oxidation and reduction scheme of poly (N-alkylanilines). (c) 2007 Elsevier B.V. All rights reserved.
    Original languageUndefined/Unknown
    Pages (from-to)974–983
    Number of pages10
    JournalSynthetic Metals
    Issue number22-23
    Publication statusPublished - 2007
    MoE publication typeA1 Journal article-refereed


    • cyclic voltammetry
    • electropolymerization
    • poly(N-alkylanilines)
    • Raman and UV-vis spectroscopy

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