Dendrimers with a 4,4′-bipyridinium core and electron-donor branches.: Electrochemical and spectroscopic properties

The synthesis, characterization, and electrochemical and spectroscopic properties of a new family of dendrimers comprising a 4,4'-bipyridinium core and 1,3-dimethyleneoxybenzene-type dendrons are described. The electrochemical results show that there is no significant inhibition of electron transfer involving the dendrimer core by the dendrons. The strong fluorescence of the 1,3-dimethyleneoxybenzene units of the branches is completely quenched as a result of charge-transfer interactions with the core.