title: Synthesis, Structure, and Photophysical Studies of a Pair of Novel Rigid Bichromophoric Systems Bearing a Methyl Viologen Acceptor Unit.
abstract: The rigid bichromophoric systems7a.2BF(4) and7b.2BF(4), comprising either a dimethoxybenzene (a) or dimethoxynaphthalene (b) unit, each covalently linked through a six-bond norbornylogous bridge to a methyl viologen unit, were synthesized with a view to studying long-range intramolecular energy (EnT) and/or electron (ET) transfer. X-ray crystallography has been used to illustrate that 7b.2BF(4) has the ability to undergo self-organization on crystallization to form extended linear arrays within the crystal lattice. Preliminary photophysical studies on 7b.2BF(4) indicate the presence of an additional rapid nonradiative process (rate constant > 2.5 x 10(10) s(-)(1)) in the bichromophore compared to a model dimethoxynaphthalene unit, and possible explanations for this process are presented.
authors.affiliation: School of Chemistry, University of New South Wales, Sydney, New South Wales, 2052 Australia, and School of Chemistry, University of Melbourne, Melbourne, Victoria 3052, Australia.
authors.forename: Donald C.
authors.initials: DC
authors.lastname: Craig
authors.forename: Kenneth P.
authors.initials: KP
authors.lastname: Ghiggino
authors.forename: Katrina A.
authors.initials: KA
authors.lastname: Jolliffe
authors.forename: Steven J.
authors.initials: SJ
authors.lastname: Langford
authors.forename: Michael N.
authors.initials: MN
authors.lastname: Paddon-Row