This project aims at the synthesis and characterization of different heteroleptic ruthenium(II) complexes based on heteroarylimidazolic ligands. For this purpose, two series were developed: the first, based on derivatives of dichlorobis(2,2’-bipyridine)ruthenium(II) complex; the second starts with the synthesis of the ligand 2,6-di(1H-imidazol-2-yl)pyridine and the formation of its complex with ruthenium.