Lattice dynamics and vibrational spectra of polythiophene. II. Effective coordinate theory, doping induced, and photoexcited spectra

DOI PDF 被引用文献1件
  • J. T. Lopez Navarrete
    Departamento de Quimica Fisica, Universidad de Malaga, E-29071 Malaga, Spain
  • G. Zerbi
    Dipartimento di Chimica Industriale, Politecnico, Piazza L. Da Vinci 32, Milano, Italy, 20133

書誌事項

公開日
1991-01-15
DOI
  • 10.1063/1.459987
公開者
AIP Publishing

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<jats:p>It is shown that the infrared and Raman spectra of polythiophene, pristine, doped or photoexcited as well as the spectra of the oligomers pristine and doped are accounted for by the effective conjugation coordinate theory. An effective conjugation force constant associated with the delocalization of the π electrons is measured. It is proven that delocalization extends at least over five thiophene rings and that the samples of the polymer consist of a distribution of conjugation lengths with a confinement length of at least five thiophene rings. The infrared spectrum of the doped and photoexcited polymer is consistent with the existence of a bipolaronic conjugational defect confined within ∼5 thiophene rings.</jats:p>

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