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.
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