Observation of large water-cluster anions with surface-bound excess electrons |
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Authors: | Verlet J R R Bragg A E Kammrath A Cheshnovsky O Neumark D M |
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Affiliation: | Department of Chemistry, University of California, Berkeley, CA 94720, USA. |
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Abstract: | 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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