title: A 1,3-phenylene-bridged hexameric porphyrin wheel and efficient excitation energy transfer along the wheel.
abstract: A 1,3-phenylene-bridged hexameric Zn(II) porphyrin wheel was synthesized by a Suzuki-Miyaura coupling reaction through a one-pot or a stepwise route. The hexameric wheel structure was revealed by using X-ray diffraction analysis. The porphyrin wheel exhibits a split Soret band due to effective exciton coupling and displays efficient excitation energy transfer along the wheel. Measurements of fluorescence anisotropy decay and pump-power-dependent decay reveal a rapid excitation energy hopping along the wheel with a rate of 1.4 ps.
authors.affiliation: Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502 (Japan), Fax: (+81) 75-753-3970.
authors.forename: Hua-Wei
authors.initials: HW
authors.lastname: Jiang
authors.forename: Sujin
authors.initials: S
authors.lastname: Ham
authors.forename: Naoki
authors.initials: N
authors.lastname: Aratani
authors.forename: Dongho
authors.initials: D
authors.lastname: Kim
authors.forename: Atsuhiro
authors.initials: A
authors.lastname: Osuka
keywords: X-ray diffraction; cross-coupling; energy transfer; light-harvesting antenna; photosynthesis; porphyrins