Evidence for Paramagnetism of Nitrogen Monoxide Molecules Chemisorbed on Transition-Metal Surfaces

Metastable-atom deexcitation spectroscopy using singlet ( exp 1 S He*) and triplet ( exp 3 S He*, exp 3 P Ne*, exp 3 P Ar*) species reveals that NO chemisorbed on Pd(111) or Pt(111) surfaces remains paramagnetic (on a time scale > 10 exp --13 s) with its 2 pi level close to the Fermi level. The 1...

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Bibliographic Details
Published in:Physical review letters 1988-04, Vol.60 (14), p.1434-1437
Main Authors: Sesselmann, W, Woratschek, B, Kuppers, J
Format: Article
Language:English
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Summary:Metastable-atom deexcitation spectroscopy using singlet ( exp 1 S He*) and triplet ( exp 3 S He*, exp 3 P Ne*, exp 3 P Ar*) species reveals that NO chemisorbed on Pd(111) or Pt(111) surfaces remains paramagnetic (on a time scale > 10 exp --13 s) with its 2 pi level close to the Fermi level. The 1 pi --5 t sigma and 4 sigma metastable-atom deexcitation spectroscopy peaks show characteristic multiplet splittings which are, however, considerably smaller than with free NO. No paramagnetic properties are found for NO adsorbed on Cu(110) which is attributed to a stronger coupling between the 2 pi level and the metal. 23 ref.--AA
ISSN:0031-9007