Uracil on Cu(110): a quantitative structure determination by energy-scanned photoelectron diffraction.
J Chem Phys
; 135(1): 014704, 2011 Jul 07.
Article
em En
| MEDLINE
| ID: mdl-21744911
ABSTRACT
The local adsorption site of the nucleobase uracil on Cu(110) has been determined quantitatively by energy-scanned photoelectron diffraction (PhD). Qualitative inspection of the O 1s and N 1s soft x-ray photoelectron spectra, PhD modulation spectra, and O K-edge near-edge x-ray adsorption fine structure indicate that uracil bonds to the surface through its nitrogen and oxygen constituent atoms, each in near atop sites, with the molecular plane essentially perpendicular to surface and aligned along the close packed [110] azimuth. Multiple scattering simulations of the PhD spectra confirm and refine this geometry. The Cu-N bondlength is 1.96 ± 0.04 Å, while the Cu-O bondlengths of the two inequivalent O atoms are 1.93 ± 0.04 Å and 1.96 ± 0.04 Å, respectively. The molecule is twisted out of the [110]direction by 11 ± 5°.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Uracila
/
Cobre
Tipo de estudo:
Qualitative_research
Idioma:
En
Revista:
J Chem Phys
Ano de publicação:
2011
Tipo de documento:
Article
País de afiliação:
Reino Unido