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Proceedings Paper

Spectroscopic studies of intracluster chemistry
Author(s): Jong-Ho Choi; Mitchio Okumura
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Paper Abstract

Infrared predissociation spectroscopy of ion-solvent clusters has allowed us to examine the effects of sequential hydration on the reactivity of cations such as NO+, NO2+, and protonated formaldehyde, H2COH+, stable gas phase ions which are known to undergo rapid reactions in aqueous solution. Our experiments demonstrate that these ions undergo hydration reactions at critical cluster sizes. The smaller clusters have spectra characteristic of H2O ligans bound to stable ion cores, but as the cluster size increases, there is a sudden onset for intracluster rearrangements, e.g. NO2+ + H2O yields H3O+ + HNO3 which occurs upon hydration with four water molecules. With this approach, we can probe microscopic aspects of solvent effects on chemical reactions including the hydration of carbonyls and acid-catalyzed hydrolysis of amides.

Paper Details

Date Published: 17 June 1994
PDF: 8 pages
Proc. SPIE 2124, Laser Techniques for State-Selected and State-to-State Chemistry II, (17 June 1994); doi: 10.1117/12.178131
Show Author Affiliations
Jong-Ho Choi, California Institute of Technology (United States)
Mitchio Okumura, California Institute of Technology (United States)

Published in SPIE Proceedings Vol. 2124:
Laser Techniques for State-Selected and State-to-State Chemistry II
John W. Hepburn, Editor(s)

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