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PHOTOELECTRON SPECTROSCOPY OF${\rm{Co}}_n^-$AND PRODUCT ANIONS OF${\rm{Co}}_n^-$WITHO2ANDN2

Author

Listed:
  • HIROYUKI YOSHIDA

    (Department of Chemistry, School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113, Japan)

  • AKIRA TERASAKI

    (Department of Chemistry, School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113, Japan)

  • TAMOTSU KONDOW

    (Department of Chemistry, School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113, Japan)

Abstract

The photoelectron spectra of${\rm{Co}}_n^-$(3≤n≤70),ComN−andComO−(3≤m≤6)were measured by a XeCl excimer laser (4.025 eV). Also the reactivities of${\rm{Co}}_n^-$withO2and CO were measured. A clear distinction between the cluster size ofn≤6and that ofn≥7was observed both in the photoelectron spectra and in the reactivities. (i) In the size range aboven=7, the electron affinities of the cobalt clusters determined by the photoelectron spectra are linearly dependent on the reciprocal of the cluster radius, but below this size they deviate from this relation. (ii) The reactivity of${\rm{Co}}_n^-$withO2in the size range belown=6is higher than that aboven=7. However, the reactivity with CO in the size range belown=6is extremely lower than that aboven=7. These findings suggest that a transition of electronic structure in size dependence, which is correlated with the reactivity, occurs atn≃7.

Suggested Citation

  • Hiroyuki Yoshida & Akira Terasaki & Tamotsu Kondow, 1996. "PHOTOELECTRON SPECTROSCOPY OF${\rm{Co}}_n^-$AND PRODUCT ANIONS OF${\rm{Co}}_n^-$WITHO2ANDN2," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 3(01), pages 667-670.
    • Handle: RePEc:wsi:srlxxx:v:03:y:1996:i:01:n:s0218625x96001194
    DOI: 10.1142/S0218625X96001194
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