Structural study of adsorption of isonicotinic acid and related molecules on rutile TiO2(110) II: XPS
Författare
Summary, in English
The adsorption of monolayers of the pyridine-carboxylic acid monomers (isonicotinic acid, nicotinic acid, and picolinic acid) on rutile TiO2(1 1 0) has been studied by means of X-ray photoemission spectroscopy. An investigation of the O 1s spectra shows that the molecular carboxylic groups are deprotonated and, hence, that the molecules bind to the surface in a bidentate mode. Moreover, the binding energy of those core levels that are related to the pyridine ring atoms shift as a function of molecule relative to the substrate O 1s and Ti 3p levels, while the position of the core levels related to emission from the carboxylic group are constant relative to the substrate levels. The molecule-dependent shifts are attributed to local intermolecular interactions that determine the proximity of adjacent molecular rings and thus the core-hole screening response of the neighbouring molecules. We propose a simple molecular arrangement for each case which satisfies the known constraints. (C) 2003 Elsevier B.V. All rights reserved.
Avdelning/ar
Publiceringsår
2003
Språk
Engelska
Sidor
74-86
Publikation/Tidskrift/Serie
Surface Science
Volym
544
Issue
1
Dokumenttyp
Artikel i tidskrift
Förlag
Elsevier
Ämne
- Natural Sciences
- Physical Sciences
Nyckelord
- evaporation and sublimation
- synchrotron radiation photoelectron spectroscopy
- chemisorption
- aromatics
- titanium oxide
- single crystal
- surfaces
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 0039-6028