PHENOL ON NI(110) - CHARACTERIZATION OF SURFACE PHENOXIDE

Autor(en): STEINMULLER, D
RAMSEY, MG
NETZER, FP
NEUBER, M
Stichwörter: ADSORPTION; Chemistry; Chemistry, Physical; ORIENTATION; OXYGEN-PRECOVERED MO(110); PD(110); Physics; Physics, Condensed Matter
Erscheinungsdatum: 1992
Herausgeber: ELSEVIER SCIENCE BV
Journal: SURFACE SCIENCE
Volumen: 271
Ausgabe: 3
Startseite: 567
Seitenende: 574
Zusammenfassung: 
The interaction of phenol with a Ni(110) surface has been investigated by angle resolved UV photoelectron spectroscopy (ARUPS) using synchrotron radiation and by thermal desorption spectroscopy (TDS) with monodeuterated d1-phenol. The TDS experiments reveal cleavage of the O-H bond at T < 240 K and the formation of surface phenoxide species in the monolayer phase. The ARUPS spectra suggest a molecular ring orientation in proximity to the metal surface, but not necessarily parallel, and surface coordination via the pi-electrons and possibly also via the O lone pair electrons. The azimuthal anisotropy observed in the ARUPS spectra indicates locally a preferential azimuthal orientation of phenoxide, with the O atom pointing in the [110BAR] direction as specified by mirror plane emission experiments. Interestingly, this azimuthal orientation of phenoxide on Ni(110) is orthogonal to the one determined recently on Pd(110), and possible reasons are discussed.
ISSN: 00396028
DOI: 10.1016/0039-6028(92)90917-U

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