Vibrational cooling kinetics of S1trans-stilbene in sodium dodecyl sulfate micellar solution observed with picosecond time-resolved resonance Raman spectroscopy
✍ Scribed by Koichi Iwata; Hiro-o Hamaguchi
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 194 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0377-0486
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✦ Synopsis
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 Ñuorescence lifetimes suggests that the microscopic environments in two solutions are similar. Picosecond time-resolved Raman spectroscopy showed that the vibrational cooling kinetics of trans-stilbene are faster in the SDS micellar solu-S 1 tion 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 e †ective method in studying solvation structure and its dynamics.