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Time evolution of JIF (denoted as J). (a) Free vibration for a gas-phase solute with an X anharmonic mode. (b) Evolution of JIF after inclusion of solvent collisional dephasing of the X vibration. The electrostatic interactions with the solvent are not included. (c) All solvent effects are considered. The solvent reorganization energy is extremely small, λS = 0.05 kcal/mol, yet JIF damping is obtained. Reprinted with permission from ref (193). Copyright 1993 Elsevier.
