The adsorption of acenes on rutile TiO2(110): A multi-technique investigation

Abstract

Articles you may be interested inInvestigating the molecule-substrate interaction of prototypic tetrapyrrole compounds: Adsorption and selfmetalation of porphine on Cu(111) J. Chem. Phys. 138, 154710 (2013); 10.1063/1.4800771 Adsorption geometry, conformation, and electronic structure of 2H-octaethylporphyrin on Ag(111) and Fe metalation in ultra high vacuumThe adsorption of benzene, naphthalene, and anthracene on the TiO 2 (110) surface has been investigated using near edge x-ray absorption spectroscopy ͑NEXAFS͒, x-ray photoelectron spectroscopy, and thermal programmed desorption. For all three adsorbates a planar adsorption geometry is found. In contrast to the bonding of benzene and larger acenes to metal surfaces, we find that the interaction is dominated by electrostatic forces between the adsorbed molecules and the TiO 2 (110) substrate. The fact that the average tilt angle between molecular and surface plane as determined by NEXAFS is substantially different from zero indicates the presence of defect species.

Organic Molecular Beam Deposition of Oligophenyls on Au(111): A Study by X‐ray Absorption Spectroscopy

“…[21] In principle, measurements of the p* intensity as a function of the incident angle q allows for determination of the angle between the transition dipole moment (TDM) and the surface normal. [20,21] As shown in previous structure investigations, 4P bulk films grown at room temperature on AuA C H T U N G T R E N N U N G (111) are highly crystalline and exhibit a predominant 4PA C H T U N G T R E N N U N G (211) orientation of the crystallites, [19] that is, the bulk (211) planes are oriented parallel to the substrate surface. Figure 1 b schematically illustrates the herringbone-type packing structure of the 4P molecules for a (211)-oriented 4P crystallite projected along a direction parallel to the long molecular axis.…”

“…First the spectra were normalized by division by spectra recorded for a clean gold substrate and finally the spectra were normalized to yield an edge jump (difference in intensity between 270 and 330 eV) of unity. For a more detailed description of the data analysis of the NEXAFS spectra, see the paper by Reiß et al [20] 2. Results and Discussion 2.1.…”

Escape dynamics of photoexcited electrons at catechol:TiO2(110)

“…39 At the same time the C 1s peak in the XPS spectra disappeared ͑Fig. 1͒ and the well-known clear 1 ϫ 1 LEED image 40 appeared. In addition Fig.…”

IR spectroscopy applied to metal oxide surfaces: adsorbate vibrations and beyond

“…frustrated rotations and translations, were not considered. The occupation of frustrated rotations results in dynamic tilt angles [120][121][122], which can make a vibration with a TDM orientated exclusively perpendicular to the surface also visible with s-polarized light. A detailed analysis of the IRRAS data considering the particular optical properties of dielectric surfaces in the context of the simple model described above yields a good agreement of the experimentally observed IR band magnitudes and signs with the theoretical predications assuming a carboxylate species with its backbone plane oriented parallel to the [0 0 0 1] azimuth and perpendicular to the surface.…”