High-temperature photoelectron spectroscopy. A study of niobium monoxide and tantalum monoxide
- 1 January 1987
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics
- Vol. 83 (8) , 1555-1565
- https://doi.org/10.1039/f29878301555
Abstract
The He I photoelectron spectra of NbO and TaO have been recorded. In both cases four main bands were observed which can be attributed to ionization of the isolated metal monoxide molecule. Bands associated with other oxides or the metal were not observed.Assignment of the photoelectron spectra of NbO and TaO was made with the aid of Hartree–Fock–Slater (HFS) calculations and by comparison with the known photoelectron spectrum of VO. The first adiabatic ionization energies of NbO and TaO have been measured as 7.91 ± 0.02 eV and 8.61 ± 0.02 eV, respectively. Suggestions are made to explain the poor agreement between previous mass-spectrometric values for the first ionization energy of each oxide.Keywords
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