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

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

doi:10.1063/1.5120706

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

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

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

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 language	English (US)
Article number	154304
Journal	Journal of Chemical Physics
Volume	151
Issue number	15
DOIs	https://doi.org/10.1063/1.5120706
State	Published - Oct 21 2019
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1063/1.5120706

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title = "Time-resolved dynamics in iodide-uracil-water clusters upon excitation of the nucleobase",

abstract = "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.",

author = "Alice Kunin and McGraw, {Valerie S.} and Lunny, {Katharine G.} and Neumark, {Daniel M.}",

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doi = "10.1063/1.5120706",

language = "English (US)",

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T1 - Time-resolved dynamics in iodide-uracil-water clusters upon excitation of the nucleobase

AU - Kunin, Alice

AU - McGraw, Valerie S.

AU - Lunny, Katharine G.

AU - Neumark, Daniel M.

PY - 2019/10/21

Y1 - 2019/10/21

N2 - 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.

AB - 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.

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

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