Journal
JOURNAL OF PHYSICAL CHEMISTRY A
Volume 106, Issue 50, Pages 11997-12001Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp026944n
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Excited-state intramolecular proton transfer (ESIPT) reaction dynamics in o-hydrokyacetophenone (OHAP) has been investigated in a supersonic molecular beam using femtosecond time-resolved multiphoton ionization mass spectrometry. The observed transients exhibit a biexponential decay and a rapidly damped oscillation with a period of similar to600 fs. The combinations of experimental and theoretical results suggested that the oscillation is due to a coherent vibrational motion that follows the molecular transformation from the initial enol configuration to the final keto form during the ESIPT reaction.
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