Local adsorption geometry of 2-methyl-pyridine on Cu(110) determined by photoelectron diffraction

摘要

Using N 1s scanned-energy mode photoelectron diffraction, together with N K-edge near-edge absorption fine structure, the local adsorption site and molecular orientation of 2-methyl-pyridine adsorbed on Cu(110) has been determined and the results are compared with a similar study of pyridine adsorption on the same surface. The molecule is found to bond to the surface through the N atom that occupies a near-atop site. The molecular plane is almost perpendicular to the surface but twisted into an azimuth away from the two principal high-symmetry directions of the surface. The aromatic ring is also tilted within the molecular plane such as to increase the separation of the methyl group away from the surface. (C) 2000 Elsevier Science B.V. All rights reserved. References: 34