Photoluminescence of [2,2 '-bis-(diphenylphosphino)-1,1 '-binaphthyl]-tricarbonylrhenium(I) chloride originating from an MLCT excited state

The longest-wavelength absorption of Re(binap) (CO)(3)Cl (binap = 2,2'-bis- (diphenyl-phosphino) -1,1'-binaphthyl) in ethanol at lambda(max) = 338 nm i s assigned to a metal-to-ligand charge transfer (MLCT) transition which ter minates at the binaphthyl moiety of the bisphosphine ligand. The MLCT tripl et is emissive in solution at r.t. (in ethanol, lambda(max) = 570 nm). Oxyg en quenches the phosphorescence of the complex. (C) 1999 Elsevier Science S .A. All rights reserved.