Photoelectron spectroscopy of cobalt oxide cluster anions

Axel Pramann, Kiichirou Koyasu, Atsushi Nakajima, Koji Kaya

研究成果: Article査読

39 被引用数 (Scopus)

抄録

Photoelectron spectroscopy of size-selected ConOm- clusters (n = 4-20; m = 0-2) is performed in a pulsed molecular beam experimental at photon energies of 3.49 and 4.66 eV. Cobalt oxide cluster anions are generated in a laser vaporization source and the photoelectron spectra are measured with a magnetic bottle photoelectron spectrometer. The size-dependent evolution of the electronic structure of the oxide clusters is discussed in terms of cluster composition. Threshold binding energy features are mainly contributed from Co d-derived orbitals throughout the complete series, indicating that the incoming oxygen atoms cause a minor influence on the electronic structures. Although for n > 13 EAs and VDEs of Con and ConOm clusters overlap within the experimental resolution, at smaller cluster sizes, the values increase in the order of Con < ConO < ConO2. For Co4O3- and Co5O3-, the spectra indicate the presence of isomers with low EAs peroxo and ozonide isomers. To compare the different channels of oxygen chemisorption, relative dissociation energies are determined via thermochemical cycles.

本文言語English
ページ(範囲)4891-4896
ページ数6
ジャーナルJournal of Physical Chemistry A
106
19
DOI
出版ステータスPublished - 2002 5月 16

ASJC Scopus subject areas

  • 物理化学および理論化学

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