Electrochemistry, Spectroelectrochemistry, and Photochemistry of a Series of New Covalently Linked Tris(2,2'-bipyridine)ruthenium(II)/Diquat Complexes

Article abstract of DOI:10.1021/ja00302a009

A method for preparing covalently linked photosensitizer / electron-acceptor complexes using a novel dimer of 4,4'-dimethyl-2,2'-bipyridine has been found.N,N'-Dialkylation of one end of the dimer results in a "diquat"-modified ligand which can be bound to Ru(II) in combination with other substituted or unsubstituted bipyridines.A series of tris(bipyridine)ruthenium/diquat complexes was prepared in which the properties of both the diquat electron acceptor and the ruthenium photosensitizer were varied.The effect of the detailed structure of these linked systems on their electrochemical, spectroelectrochemical, and photophysical properties was investigated.