Abstract
Microscopic solvation environments and ultrafast intermolecular energy transfer kinetics of trans-stilbene were studied in a sodium dodecyl sulfate (SDS) micellar solution and in a dodecane solution. The UV absorption spectrum showed no evidence of aggregate formation in the micellar solution. The agreement of the fluorescence lifetimes suggests that the microscopic environments in two solutions are similar. Picosecond time-resolved Raman spectroscopy showed that the vibrational cooling kinetics of S1 trans-stilbene are faster in the SDS micellar solution than in dodecane. These results are explained well by a simple model of solute–solvent energy transfer and solute vibrational cooling proposed earlier. Picosecond time-resolved Raman spectroscopy can be an effective method in studying solvation structure and its dynamics. © 1998 John Wiley & Sons, Ltd.
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