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          Institute: Fritz-Haber-Institut     Collection: Molecular Physics     Display Documents



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ID: 315253.0, Fritz-Haber-Institut / Molecular Physics
Vibrational spectroscopy of hydrated electron clusters (H2O)-15-50 via infrared multiple photon dissociation
Authors:Asmis, Knut R.; Santambrogio, Gabriele; Zhou, Jia; Garand, Etienne; Headrick, Jeffrey; Goebbert, Daniel; Johnson, Mark A.; Neumark, Daniel M.
Language:English
Date of Publication (YYYY-MM-DD):2007-05-21
Title of Journal:Journal of Chemical Physics
Journal Abbrev.:J. Chem. Phys.
Volume:126
Issue / Number:19
Start Page:191105-1
End Page:191105-5
Copyright:©2007 American Institute of Physics
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:Infrared multiple photon dissociation spectra for size-selected water cluster anions (H2O)-n, n=15–50, are presented covering the frequency range of 560–1820 cm-1. The cluster ions are trapped and cooled by collisions with ambient He gas at 20 K, with the goal of defining the cluster temperature better than in previous investigations of these species. Signal is seen in two frequency regions centered around 700 and 1500–1650 cm-1, corresponding to water librational and bending motions, respectively. The bending feature associated with a double-acceptor water molecule binding to the excess electron is clearly seen up to n=35, but above n=25; this feature begins to blueshift and broadens, suggesting a more delocalized electron binding motif for the larger clusters in which the excess electron interacts with multiple water molecules.
External Publication Status:published
Document Type:Article
Communicated by:Gerard Meijer
Affiliations:Fritz-Haber-Institut/Molecular Physics
External Affiliations:Sterling Chemistry Laboratory, Yale University, P.O. Box 208107, New Haven, Connecticut 06520;
Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany;
Department of Chemistry, University of California, Berkeley, California 94720 and Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720;
Identifiers:URL:http://scitation.aip.org/getabs/servlet/GetabsServ...
DOI:10.1063/1.2741508
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