title: Superexchange mediated energy transfer in zinc(II) porphyrin-free base porphyrin dimers: comparison of m- and p-bis(phenylethynyl) phenylene linked dimers.
abstract: The singlet-singlet energy transfer rate in a new zinc(II) porphyrin-free base porphyrin dimer, having a m-bis(phenylethynyl)phenylene bridge, was found to be slower than that in the corresponding p-bis(phenylethynyl)phenylene-bridged dimer, despite the shorter donor-acceptor distance and pathway. The slower rate is interpreted as evidence for a major contribution of the superexchange mechanism.
authors.affiliation: Department of Chemistry, Tokyo Metropolitan University, 1-1, Minami-Ohsawa, Hachi-Ohji, Tokyo 192-0397, Japan. motoko@tmu.ac.jp
authors.forename: Motoko S
authors.initials: MS
authors.lastname: Asano
authors.forename: Ken-ichi
authors.initials: K
authors.lastname: Yamashita
authors.forename: Masato
authors.initials: M
authors.lastname: Kitabayashi
authors.forename: Kazuki
authors.initials: K
authors.lastname: Kusama
authors.forename: Daichi
authors.initials: D
authors.lastname: Kagota
authors.forename: Ken-ichi
authors.initials: K
authors.lastname: Sugiura