title: Photoinduced charge shift and charge recombination through an alkynyl spacer for an expanded acridinium-based dyad.
abstract: The photophysical and electrochemical properties of a dyad comprising an expanded acridinium light-harvester, coupled via a triple bond to a trialkyloxybenzene donor, are described. Laser excitation of the dyad in 1,2-dichloroethane (DCE) results in rapid charge shift (5 ps) followed by slower charge recombination (81 ps) to completely restore the ground state. Discrimination between forward and return electron transfer (k(ret)/k(for) ~ 16) is rather poor. There is no indication of triplet formation on the expanded acridinium-based group following charge recombination.
authors.affiliation: Molecular Photonics Laboratory, School of Chemistry, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK. a.c.benniston@ncl.ac.uk
authors.forename: Andrew C
authors.initials: AC
authors.lastname: Benniston
authors.forename: Jerry
authors.initials: J
authors.lastname: Hagon
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: He
authors.forename: Helge
authors.initials: H
authors.lastname: Lemmetyinen
authors.forename: Nikolai V
authors.initials: NV
authors.lastname: Tkachenko
authors.forename: William
authors.initials: W
authors.lastname: Clegg
authors.forename: Ross W
authors.initials: RW
authors.lastname: Harrington