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Title: Infrared detection of (H2O)20 isomers of exceptional stability: A drop-like and a face-sharing pentagonal prism cluster

Journal Article · · Physical Chemistry Chemical Physics. PCCP
DOI:https://doi.org/10.1039/C4CP03642E· OSTI ID:1166684
 [1];  [1];  [1];  [1];  [2];  [1];  [3]
  1. Univ. Gottingen, Gottingen (Germany)
  2. Max-Planck-Institut fur Dynamik und Selbstorganisation, Gottingen (Germany)
  3. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

Water clusters containing fully coordinated water molecules are model systems that mimic the local environment of the condensed phase. Present knowledge about the water cluster size regime in which the transition from the allsurface to the fully solvated water molecules occurs is mainly based on theoretical predictions in lieu of the absence of precisely size resolved experimental measurements. Here, we report size and isomer selective infrared (IR) spectra of (H2O)20 clusters tagged with a sodium atom by employing IR excitation modulated photoionization spectroscopy. The observed absorption patterns in the OH stretching ”fingerprint” region are consistent with the theoretically predicted spectra of two structurally distinct isomers: A drop-like cluster with a fully coordinated (interior) water and an edge-sharing pentagonal prism cluster in which all atoms are on the surface. The observed isomers show exceptional stability and are predicted to be nearly isoenergetic.

Research Organization:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1166684
Report Number(s):
PNNL-SA-102598; PPCPFQ; KC0301020
Journal Information:
Physical Chemistry Chemical Physics. PCCP, Vol. 16, Issue 48; ISSN 1463-9076
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 23 works
Citation information provided by
Web of Science

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Atlas of putative minima and low-lying energy networks of water clusters n = 3–25 journal December 2019
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