Thermal effects on energetics and dynamics in water cluster anions (H 2O) n -

Ryan M. Young; Margaret A. Yandell; Sarah B. King; Daniel M. Neumark

doi:10.1063/1.3689439

Thermal effects on energetics and dynamics in water cluster anions (H ₂O) _n ^-

Ryan M. Young, Margaret A. Yandell, Sarah B. King, Daniel M. Neumark^*

^*Corresponding author for this work

Paula M. Trienens Institute for Sustainability and Energy

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

21 Scopus citations

Abstract

The electron binding energies and relaxation dynamics of water cluster anions (H ₂O) _n ^- (11 ≤ n ≤ 80) formed in co-expansions with neon were investigated using one-photon and time-resolved photoelectron imaging. Unlike previous experiments with argon, water cluster anions exhibit only one isomer class, the tightly bound isomer I with approximately the same binding energy as clusters formed in argon. This result, along with a decrease in the internal conversion lifetime of excited (H ₂O) _n ^- (25 ≤ n ≤ 40), indicates that clusters are vibrationally warmer when formed in neon. Over the ranges studied, the vertical detachment energies and lifetimes appear to converge to previously reported values.

Original language	English (US)
Article number	094304
Journal	Journal of Chemical Physics
Volume	136
Issue number	9
DOIs	https://doi.org/10.1063/1.3689439
State	Published - Mar 7 2012

Funding

This work was supported by the National Science Foundation (NSF) under Grant No. CHE-0649647. M.A.Y. acknowledges funding from a National Defense Science and Engineering Graduate (NDSEG) Fellowship through the Air Force Office of Scientiﬁc Research (AFOSR), 32 CFR 168a. S.B.K. is grateful for funding through an NSF Graduate Research Fellowship. We thank one of the referees for insightful comments about the evaporative ensemble model.

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

Access to Document

10.1063/1.3689439

Cite this

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title = "Thermal effects on energetics and dynamics in water cluster anions (H 2O) n - ",

abstract = "The electron binding energies and relaxation dynamics of water cluster anions (H 2O) n - (11 ≤ n ≤ 80) formed in co-expansions with neon were investigated using one-photon and time-resolved photoelectron imaging. Unlike previous experiments with argon, water cluster anions exhibit only one isomer class, the tightly bound isomer I with approximately the same binding energy as clusters formed in argon. This result, along with a decrease in the internal conversion lifetime of excited (H 2O) n - (25 ≤ n ≤ 40), indicates that clusters are vibrationally warmer when formed in neon. Over the ranges studied, the vertical detachment energies and lifetimes appear to converge to previously reported values.",

author = "Young, {Ryan M.} and Yandell, {Margaret A.} and King, {Sarah B.} and Neumark, {Daniel M.}",

note = "Funding Information: This work was supported by the National Science Foundation (NSF) under Grant No. CHE-0649647. M.A.Y. acknowledges funding from a National Defense Science and Engineering Graduate (NDSEG) Fellowship through the Air Force Office of Scientiﬁc Research (AFOSR), 32 CFR 168a. S.B.K. is grateful for funding through an NSF Graduate Research Fellowship. We thank one of the referees for insightful comments about the evaporative ensemble model.",

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