PHOTOELECTRON SPECTROSCOPY OF MASS-SELECTED METAL-WATER CLUSTER NEGATIVE IONS: Cu−(H2O)nANDNa−(H2O)n

F. Misaizu, K. Tsukamoto, M. Sanekata and K. Fuke
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F. Misaizu: Institute of Molecular Science and the Graduate University for Advanced Studies, Myodaiji, Okazaki 444, Japan
K. Tsukamoto: Institute of Molecular Science and the Graduate University for Advanced Studies, Myodaiji, Okazaki 444, Japan
M. Sanekata: Institute of Molecular Science and the Graduate University for Advanced Studies, Myodaiji, Okazaki 444, Japan
K. Fuke: Institute of Molecular Science and the Graduate University for Advanced Studies, Myodaiji, Okazaki 444, Japan

Surface Review and Letters (SRL), 1996, vol. 03, issue 01, 405-410

Abstract: The electronic structures of hydrated metal-atom clusters have been investigated by negative-ion photoelectron spectroscopy. We have obtained the photoelectron spectra ofCu−(H2O)nwithn=0−4andNa−(H2O)nwithn=0−12. For the former clusters, we also detected the electron detachment from theCuOH−(H2O)n−1which coexists withCu−(H2O)n. The observed bands for bothCu−(H2O)nandNa−(H2O)nwere all assigned to the transitions to the states originating in those of the metal atoms, which are shifted as a result of hydration. This result implies that the ground states of the neutral clusters still have a one-center character at the size range examined. In contrast, for the Na–water clusters, increasing character of the Rydberg-type ion-pair state in the negative-ion state is suggested from the vertical-detachment-energy dependence on the solvent number.

Date: 1996
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DOI: 10.1142/S0218625X96000735

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