SYNTHESIS AND PROPERTIES OF TERDENTATES WITH EXTRA PYRIDINE RING AND THEIR RU(II) COMPLEXES

The synthesis and electronic as well as redox properties of four Ru(II ) complexes based on the ligand 3,3';5',3''-bis-dimethyiene-2,2';6,2'' -terpyridine are reported. Each new complex is of the type [Ru(L)(2)]( n+) and [Ru(tpy)(L)](n+), where L is the terdentate ligand with extra pyridine ring at 4'-position or is a N-methylated ligand and n=2, 3, o r 4. Cyclic voltammetry indicates that the first electron added to the complex enters the viologen-type acceptor in N-methylated ligand.