Susmita Kar
Articles written in Pramana – Journal of Physics
Volume 71 Issue 2 August 2008 pp 211-232
Solvent density mode instability in non-polar solutions
Susmita Kar Ranjit Biswas J Chakrabarti
We analyse the origin of the multiple long time scales associated with the long time decay observed in non-polar solvation dynamics by linear stability analysis of solvent density modes where the effects of compressibility and solvent structure are systematically incorporated. The coupling of the solute–solvent interactions at both ground and excited states of the solute with the compressibility and solvent structure is found to have important effects on the time scales. The present theory suggests that the relatively longer time constant is controlled by the solvent compressibility, while the solvent structure at the nearest-neighbour length scale dominates the shorter time constant.
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