Synthesis and properties of nano-scale oligothiophenes: From conducting-polymer models to materials for molecular electronics

Yoshio Aso, Kazuo Takimiya, Tetsuo Otsubo

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

A series of the longest class of oligothiophenes extended at intervals of seven thiophene units from the 6-mer up to the 48-mer has been synthesized. It is estimated that the molecular length of the longest 48-mer reaches approximately 18.6 nm. The systematic studies of the oligothiophenes have provided valuable information on the optical and conductive properties of α-conjugated thiophene systems: an effective conjugation length extends to 20-30 thiophene units, and the active charge carrier species are both π-dimers and chain dimers. The efficient molecular-wire behaviors of oligothiophenes have been demonstrated by photoinduced electron and/or energy transfer characteristics of the fullerene-linked dyad and triad systems. The successful application of these systems to a photovoltaic molecular device is also described.

Original languageEnglish
Pages (from-to)52-61
Number of pages10
JournalYuki Gosei Kagaku Kyokaishi/Journal of Synthetic Organic Chemistry
Volume60
Issue number1
DOIs
Publication statusPublished - 2002 Jan

Keywords

  • Bipolaron
  • Chain dimer
  • Effective conjugation length
  • Molecular wire
  • Oligothiophenes
  • Photoinduced electron transfer
  • Photoinduced energy transfer
  • Photovoltaic device
  • Polaron
  • π-dimer

ASJC Scopus subject areas

  • Organic Chemistry

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