Okumura, M. and Yeh, L. I. and Myers, J. D. and Lee, Y. T. (1986) Infrared spectra of the cluster ions H7O<sup> + </sup><sub>3</sub>·H2 and H9O<sup> + </sup><sub>4</sub>·H2. Journal of Chemical Physics, 85 (4). pp. 2326-2327. ISSN 0021-9606 http://resolver.caltech.edu/CaltechAUTHORS:OKUjcp86b
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Infrared spectra of hydrated hydronium ions weakly bound to an H2 molecule, specifically H7O<sup> + </sup><sub>3</sub> ·H2 and H9O<sup> + </sup><sub>4</sub> ·H2, have been observed. Mass-selected parent ions, trapped in a radio frequency ion trap, are excited by a tunable infrared laser; following absorption, the complex predissociates with loss of the H2, and the resulting fragment ions are detected. Spectra have been taken from 3000 to 4000 cm^−1, with a resolution of 1.2 cm^−1. They are compared to recent theoretical and experimental spectra of the hydronium ion hydrates alone. Binding an H2 molecule to these clusters should only weakly perturb their vibrations; if so, our spectra should be similar to spectra of the hydrated hydronium ions H7O<sup> + </sup><sub>3</sub> and H9O<sup> + </sup><sub>4</sub>.
|Additional Information:||© 1986 American Institute of Physics. Received 5 May 1986; accepted 6 June 1986. We thank R. Remington and H.F. Schaefer III for giving us unpublished results. M.O. thanks L. Friedman for useful discussions concerning the source. Supported by the Director, Office of Energy Research, Office of Basic Energy Sciences, Chemical Sciences Division of the U.S. Department of Energy, under Contract No. DE-AC-3-76SF00098. [J.D.M. was an] NSF Pre-Doctoral Fellow.|
|Subject Keywords:||INFRARED SPECTRA, OXONIUM IONS, ION PAIRS, PREDISSOCIATION, HYDROGEN, ADDUCTS, BINDING ENERGY, MOLECULAR CLUSTERS|
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|Deposited By:||Archive Administrator|
|Deposited On:||17 Apr 2008|
|Last Modified:||26 Dec 2012 09:58|
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