Polyether-bridged sexithiophene as a complexation-gated molecular wire for intramolecular photoinduced electron transfer

Takuro Oike, Tomoyuki Kurata, Kazuo Takimiya, Tetsuo Otsubo, Yoshio Aso, Huimin Zhang, Yasuyuki Araki, Osamu Ito

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

The porphyrin-sexithiophene-fullerene triad 2, where the two central thiophene units of the sexithiophene spacer are bridged with a crown-ether-like polyether chain, undergoes efficient intramolecular electron transfer from the photoexcited porphyrin moiety to the fullerene through the sexithiophene. However, complexation with a sodium cation in the crown ether ring causes complete suppression of electron transfer as a result of a drastic conformational change of the sexithiophene backbone. Furthermore, decomplexation resumes the photoinduced electron transfer. This on/off switching phenomenon indicates that the polyether-bridged sexithiophene can function as a complexation-gated molecular wire.

Original languageEnglish
Pages (from-to)15372-15373
Number of pages2
JournalJournal of the American Chemical Society
Volume127
Issue number44
DOIs
Publication statusPublished - 2005 Nov 9

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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