Time-resolved dynamics in iodide-uracil-water clusters upon excitation of the nucleobase

Alice Kunin, Valerie S. McGraw, Katharine G. Lunny, Daniel M. Neumark

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9 Scopus citations


The dynamics of iodide-uracil-water (I-·U·H2O) clusters following π-π excitation of the nucleobase are probed using time-resolved photoelectron spectroscopy. Photoexcitation of this cluster at 4.77 eV results in electron transfer from the iodide moiety to the uracil, creating a valence-bound anion within the cross correlation of the pump and probe laser pulses. This species can decay by a number of channels, including autodetachment and dissociation to I- or larger anion fragments. Comparison of the energetics of the photoexcited cluster and its decay dynamics with those of the bare iodide-uracil (I-·U) complex provides a sensitive probe of the effects of microhydration on these species.

Original languageEnglish (US)
Article number154304
JournalJournal of Chemical Physics
Issue number15
StatePublished - Oct 21 2019
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


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