Stable macrocyclic and tethered donor-acceptor systems. Intramolectular bipyridinium and tetratihiafulvalene assemblies

摘要

A series of compounds has been prepared in which a tetrathiafulvalene (TTF)-derived donor is covalently tethered or bridged to one or more bipyridinium (viologe) acceptors. The relative degree of charge transfer observed in this series is discussed as a function of structure. The greatest CT effect is seen in the cyclophanes 9a-c and 13.