Synthesis and characterization of dichloro(2,2′-bipyridyl-4,4′- dicarboxylate)bis(triphenylphosphine)ruthenium(II) for efficient photosensitization of titanium oxide

Abstract

Ru(PPh₃)₂(dcbipy)Cl₂ (PPh₃=triphenylphosphine, dcbipy=2,2′-bipyridyl-4,4′-dicarboxylate) was prepared to use as a TiO₂ sensitizer in wet regenerative photoelectrochemical cells. The complex has been structurally characterized by IR, Raman, ES-MS and NMR spectroscopies. The broad bands in the visible spectrum as well as the reversibility of the redox couple Ru^II–Ru^III, established by cyclic voltammetry, make this complex potentially beneficial for the photosensitization process.