K. Weiss et al., NEAR-EDGE X-RAY-ABSORPTION FINE-STRUCTURE STUDY OF BENZENE ADSORBED ON METAL-SURFACES - COMPARISON TO BENZENE CLUSTER COMPLEXES, Journal of vacuum science & technology. A. Vacuum, surfaces, and films, 16(3), 1998, pp. 1017-1022
Citations number
23
Categorie Soggetti
Physics, Applied","Materials Science, Coatings & Films
Near edge x-ray absorption fine structure (NEXAFS) spectroscopy has be
en used to study benzene adsorbed on several close-packed metal surfac
es [Au(111), Rh(111), Pt(111), and Ru(0001)] under the same experiment
al conditions. The NEXAFS spectra reveal significant differences with
regard to the shapes and positions of resonances and the dichroism obs
erved for the resonance intensities. These differences correlate direc
tly with the binding energy and can be attributed to differences in th
e electronic coupling of the benzene molecule to the substrate and to
adsorption induced changes in the molecular structure of the benzene m
olecule. A comparison to the NEXAFS spectra recorded for the benzene m
etal cluster complexes [Ru(eta(6)-C6H6)(CH3CN)(3)](2+) and Ru3(CO)(9)(
mu(3):eta(2) eta(2) eta(2)-C6H6) indicates that the mu(3)-arene comple
x, where the benzene ring is bonded to three metal atoms, can be regar
ded as a reasonable cluster analog for the adsorption of benzene on th
e Ru(0001) transition metal surface. (C) 1998 American Vacuum Society.