title: Polyether-bridged sexithiophene as a complexation-gated molecular wire for intramolecular photoinduced electron transfer.
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.
authors.affiliation: Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan.
authors.forename: Takuro
authors.initials: T
authors.lastname: Oike
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Kurata
authors.forename: Kazuo
authors.initials: K
authors.lastname: Takimiya
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Otsubo
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Aso
authors.forename: Huimin
authors.initials: H
authors.lastname: Zhang
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Araki
authors.forename: Osamu
authors.initials: O
authors.lastname: Ito