Abstract

This chapter reviews recent progress in ultrafast spectroscopy of excited state hydrogen transfer in the liquid phase. The ultrafast dynamics and the mechanisms of intramolecular hydrogen transfer induced by electronic excitation of aromatic molecules as well as related processes of vibrational energy redistribution are discussed. The main emphasis is on results from steady-state and femtosecond time-resolved vibrational spectroscopy and on femtosecond pump-probe studies of transient electronic absorption and emission bands. From such results, a qualitative microscopic picture of ultrafast intramolecular hydrogen transfer is derived.

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