Abstract

Ultrafast dynamic solvent properties are recognized to play an important role in controlling the rate of charge transfer reactions. 1 Dynamic solvation has been studied by time dependent fluorescence Stokes shift measurements of dipolar chromophores. However, only one measurement with sufficient time resolution to reveal a large contribution arising from underdamped solvent motion has been reported.2 The solvent motions giving rise to the solvent response should also contribute to the collective nuclear response in transient birefringence measurements of the neat liquid.3 To explore the connection between the two experiments and further characterize ultrafast dynamic solvation we have performed both time resolved fluorescence and transient birefringence experiments in acetonitrile, methanol, and dimethyl sulfoxide.

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