SOLVENT REORGANIZATION ENERGETICS AND DYNAMICS IN CHARGE-TRANSFER PROCESSES OF TRANSITION-METAL COMPLEXES

Time-resolved and steady-state luminescence measurements were used to probe the energetics and dynamics of solvation in two different transition metal complexes. The metal-to-ligand charge-transfer excited state of Ru(bpy)2(CN)2 (bpy is bipyridine) was studied in a series of alphatic alcohols, and the luminescent excited state of Mo2Cl4[P(CH3)3]4 was studied in aprotic organic solvents. The energetics of excited-state solvation were evaluated from the shapes and positions of the steady-state luminescence spectra recorded at low (approximately 10 K) and room temperatures. The dynamics of excited-state solvation were probed by time-resolved emission spectroscopy.