Δ4,4′-dicyclopenta[2,1-b:3,4-b′]dithiophene a conjugated bridging unit for low band gap conducting polymers

Kavithaa Loganathan, Eduardo G. Cammisa, Brent D. Myron, Peter G. Pickup

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25 Citations (Scopus)

Abstract

Δ4,4′-Dicyclopenta[2,1-b:3,4-b′]dithiophene has been prepared from cyclopenta[2,1-b:3,4- b′]bithiophen-4-one and its electrochemical and spectroscopic properties have been characterized. Its low HOMO-LUMO gap and facile electrochemical polymerization make it an attractive building block for low band gap conducting polymers. Films of poly-(Δ4,4′-dicyclopenta[2,1-b:3,4-b′]dithiophene) on electrodes have been characterized by cyclic voltammetry, electronic absorption spectroscopy, IR spectroscopy, and in situ conductivity measurements. The spectroscopic and electrochemical results confirm the formation of a polymeric material with long conjugation length and low band gap (ca. 0.5 eV). The intrinsic conductivity is consistent with this band gap.

Original languageEnglish
Pages (from-to)1918-1923
Number of pages6
JournalChemistry of Materials
Volume15
Issue number9
DOIs
Publication statusPublished - 6 May 2003

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ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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