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Observation of large water-cluster anions with surface-bound excess electrons.

Verlet, J. R. R. and Bragg, A. E. and Kammrath, A. and Cheshnovsky, O. and Neumark, D. M. (2005) 'Observation of large water-cluster anions with surface-bound excess electrons.', Science., 307 (5706). pp. 93-96.


Anionic water clusters have long been studied to infer properties of the bulk hydrated electron. We used photoelectron imaging to characterize a class of (H2O)n– and (D2O)n– cluster anions (n 200 molecules) with vertical binding energies that are significantly lower than those previously recorded. The data are consistent with a structure in which the excess electron is bound to the surface of the cluster. This result implies that the excess electron in previously observed water-cluster anions, with higher vertical binding energies, was internally solvated. Thus, the properties of those clusters could be extrapolated to those of the bulk hydrated electron.

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Record Created:14 May 2007
Last Modified:12 Aug 2010 11:52

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