EFFECT OF THE CHARGE OF THE SOLVENT PROBE ON THE SOLVATED ELECTRON

The solvent reorganisation around two molecular probes, LDS 751 and DC M, has been investigated in methanol solution. The decrease of the mea n frequency of the DCM fluorescence spectrum as a function of time sho ws a biexponential kinetics. The fast decay has a (175+/-100) fs time constant and the slow component (3,2+/-0,1) ps is identical to the val ue found in the case of LDS 751. These findings are discussed with ref erence to the charge distribution in the electronic states involved an d to literature results concerning another solvent probe, the solvated electron generated by pulse radiolysis or by multiphotonic ionisation of methanol.