A photoelectron diffraction investigation of vanadyl phthalocyanine on Au(111)

作者：Duncan D A; Unterberger W; Hogan K A; Lerotholi T J; Lamont C L A; Woodruff D P^*

来源：Surface Science, 2010, 604(1): 47-53.

DOI：10.1016/j.susc.2009.10.018

• Surface structure, morphology, roughness, and topography
• Photoelectron diffraction measurement
• Chemisorption
• Gold
• Phthalocyanine

Scanned-energy mode photoelectron diffraction using the O 1s and V 2p emission perpendicular to the surface has been used to investigate the orientation and internal conformation of vanadyl phthalocyanine (VOPc) adsorbed on Au(1 1 1). The results confirm earlier indications from scanning tunnelling microscopy that the V=O vanadyl bond points out of. and not into. the surface The V=O bondlength is 1 60 +/- 0.04 angstrom. not significantly different from Its Value in bulk crystalline VOPc However, the V atom in the adsorbed molecule is almost coplanar with the surrounding N atoms and is thus pulled down into the approximately planar region defined by the N and C atoms by 0 52 (+0.14/-0 10) angstrom, relative to its location in crystalline VOPc. This change must be attributed to the bonding interaction between the molecule and the underlying metal surface.

• 出版日期2010-1-1