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

SURFACE SCIENCE

卷:604

Article

Duncan, D. A.¹  Unterberger, W.²  Hogan, K. A.³  Lerotholi, T. J.¹  Lamont, C. L. A.³  Woodruff, D. P.¹ 

[1] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

[2] Max Planck Gesell, Fritz Haber Inst, D-14195 Berlin, Germany

[3] Univ Huddersfield, Dept Chem & Biol Sci, Huddersfield HD1 3DH, W Yorkshire, England

关键词: Surface structure, morphology, roughness, and topography;    Photoelectron diffraction measurement;    Chemisorption;    Gold;    Phthalocyanine;   

DOI  :  10.1016/j.susc.2009.10.018

来源: Elsevier

【 摘 要 】

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. (C) 2009 Elsevier B.V All rights reserved

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