Nk. Petrov et al., STUDY OF PREFERENTIAL SOLVATION IN BINARY SOLVENT MIXTURES BY THE SPECTRO-STREAK PICOSECOND TECHNIQUE, Chemical physics letters, 241(1-2), 1995, pp. 127-132
Using the picosecond spectre-streak method we monitored the dynamics o
f preferential solvation of a charge-transfer dipole in binary mixture
s of solvents strongly different in dielectric constant. The observed
slow (0.25-1 ns) spectral red-shift of the charge-transfer (exciplex)
fluorescence is considered to be mainly due to the formation and the d
ielectric enrichment of the solvation shell around the dipolar solute
molecules by diffusion of polar molecules from the bulk of the solvent
mixture.