INQUINOA   21218
INSTITUTO DE QUIMICA DEL NOROESTE
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Improving the photosensitizing properties of transition metal complexes
Autor/es:
KATZ, NÉSTOR E.
Lugar:
Campinas
Reunión:
Conferencia; Seminarios de Investigación de la Universidad de Campinas; 2014
Institución organizadora:
Departamento de Fisicoquímica del Instituto de Química de UNICAMP
Resumen:
Synthesis and spectroscopic, electrochemical, spectroelectrochemical and photophysical properties of a novel series of ruthenium polypyridyl complexes with 4-methyl-2,2?-bipyridine-4?-carbonitrile (Mebpy-CN) as an auxiliary ligand, of general formula [Ru(bpy)3-x(Mebpy-CN)x](PF6)2 (x = 1-3) (with bpy = 2,2?-bipyridine) will be described. A significant increase in lifetime and quantum yield of emission of the lowest 3MLCT excited state is disclosed when going from x = 1 to x = 3, evidencing an improvement of the photosensitizing properties respect to [Ru(bpy)3](PF6)2. Furthermore, quenching by molecular oxygen of 3MLCT excited states of the three complexes produces singlet molecular oxygen (1O2) with quantum yield values higher than that of [Ru(bpy)3]2+ in CH3CN. The structure of the complex with x = 1 has been determined by X-ray diffraction. The photoconductivity of ZnO nanowires covered with this same complex is increased by an order of magnitude, pointing to its feasibility as a component of a DSSC.