PHOTOREACTIVITY OF INSTERFULLERENE-BIS(TRIPHENYLPHOSPHITE)PLATINUM(0)INDUCED BY METAL-TO-LIGAND CHARGE-TRANSFER EXCITATION

The complex C60Pt[P(OPh)(3)](2) displays C-60 pi pi intraligand bands in the UV-Vis region and a long-wavelength absorption at lambda(max) = 770 nm which is assigned to a metal-to-ligand charge transfer (MLCT) transition from platinum to fullerene. The irradiation of the complex leads to the population of the reactive MLCT state and subsequently t o the dissociation (C60Pt[P(OPh)(3)](2) --> C-60 + Pt[P(OPh)(3)](2)) i n the primary photochemical step. Product formation takes place by the interception of Pt[P(OPh)(3)](2) with suitable scavengers such as CHC l3 or O-2.