Heteroleptic Ruthenium tris-bipyridyl complexes as photosensitizers for overall photocatalytic water splitting

AEI 75

W. Justin Youngblood, wjy2@psu.edu, Miharu Eguchi, Anne E. Kaintz, Seung-Hyun Lee, and Thomas E. Mallouk, tom@chem.psu.edu. Department of Chemistry, The Pennsylvania State University, 104 Chemistry Building, University Park, PA 16802
Heteroleptic Ru-(tris)bpy complexes are prepared for photosensitization of metal oxide semiconductors (MOS) used in photocatalyic water splitting. In addition to light absorption, the complexes serve as an electrochemical bridge between the metal oxide semiconductor which catalyzes water reduction and IrO2 nanoparticles which catalyze water oxidation. The photophysics of the complexes and kinetics of electron transfer in the Ru-bpy/MOS composites are characterized by transient absorption, transient diffuse reflectance, steady-state fluorescence, and steady-state water photolysis techniques.