Site- and Symmetry-Resolved Resonant X-ray Emission Study of a Highly Ordered PTCDA Thin Film
Document Type
Article
Publication Date
1-1-2016
Publication Title
Journal of Physical Chemistry C
Volume
120
Issue
16
First page number:
8607
Last page number:
8615
Abstract
The complex electronic structure of ordered 3,4,9,10-perylene tetracarboxylic acid dianhydride (PTCDA) multilayers on Ag(111) is investigated by angle-dependent resonant X-ray emission spectroscopy at the carbon K edge. Beam damage effects were characterized and special care was taken to avoid their influence on the spectra. Appropriate selection of excitation energies and detection geometries allow us to record element-, atom-, and symmetry-specific X-ray emission spectra by making use of dipole selection rules. This specificity, especially the ability to distinguish between and orbitals, gives unprecedented experimental insights into the electronic structure of this large organic molecule. The experimental results are compared with calculated spectra of the isolated molecule, as derived from density functional theory. This allows a detailed discussion of the spectra and separation of the contributions from nonequivalent carbon atoms. © 2016 American Chemical Society.
Language
English
Repository Citation
Weinhardt, L.,
Fuchs, O.,
Fischer, A.,
Weigand, M.,
Meyer, F.,
Benkert, A.,
Blum, M.,
Bär, M.,
Pookpanratana, S.,
Denlinger, J.,
Heske, C.,
Umbach, E.
(2016).
Site- and Symmetry-Resolved Resonant X-ray Emission Study of a Highly Ordered PTCDA Thin Film.
Journal of Physical Chemistry C, 120(16),
8607-8615.
http://dx.doi.org/10.1021/acs.jpcc.5b12422