Hydrogen-bond induced surface core-level shift in isonicotinic acid

Authors
O'Shea, JN Schnadt, J Bruhwiler, PA Hillesheimer, H Martensson, N Patthey, L Krempasky, J Wang, CK Luo, Y Agren, H
Citation
Jn. O'Shea et al., Hydrogen-bond induced surface core-level shift in isonicotinic acid, J PHYS CH B, 105(10), 2001, pp. 1917-1920
Citations number
29
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
JOURNAL OF PHYSICAL CHEMISTRY B
ISSN journal
15206106 → ACNP
Volume
105
Issue
10
Year of publication
2001
Pages
1917 - 1920
Database
ISI
SICI code
1520-6106(20010315)105:10<1917:HISCSI>2.0.ZU;2-D
Abstract
Intermolecular hydrogen-bonding in thick films of isonicotinic acid evapora ted onto rutile TiO2(110) has been investigated with X-ray photoelectron sp ectroscopy (XPS) and X-ray absorption spectroscopy (XAS). The rate of depos ition is found to be a key factor in overcoming the kinetic barriers to ext ensive hydrogen-bond formation, which, when present, gives rise to large en ergy shifts between bulk and surface in both the N1s XPS and XAS. The origi n of the surface core-level shift is attributed to the presence of non-hydr ogen-bonded nitrogen atoms in the surface layer.