Synthesis of a new series of poly-2,2′-bipyridinyl ruthenium(II) complexes with polytopic ligands derived from 4-methyl-2,2′-bipyridine

Five novel disymmetrical ligands containing two or more 2,2′-bipyridine moieties covalently linked, belonging to 4, 5 or 8 coordination sites, have been synthesized with high yield, starting from previously prepared 4-methyl-2,2′-bipyridine. Their abilities to complex ruthenium(II) have been investigated as well as the determination of the main physico-chemical features of the resulting multinuclear complexes.