Regensburg 2016 – scientific programme
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O: Fachverband Oberflächenphysik
O 98: Organic-Inorganic Systems V: Adsorption on Metals
O 98.3: Talk
Friday, March 11, 2016, 11:00–11:15, H24
Multiple molecular templates induced by dehydrogenation of a benzoquinone derivative on Cu(111) — •Giuseppe Mercurio1, Nils Wind1, Simon Weiß2,3, Serguei Soubatch2,3, Frank Stefan Tautz2,3, and Wilfried Wurth1,4 — 1Physics Department and Center for Free-Electron Laser Science, University of Hamburg, Hamburg, Germany — 2Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, Jülich, Germany — 3JARA - Fundamentals of Future Information Technology, Germany — 4DESY Photon Science, Hamburg, Germany
Organic layers on metal surfaces self-organize in a great variety of different surface templates depending on the intermolecular and molecule-metal interactions. The design of a molecular building block with specific structural and chemical properties needs to account for possible chemical modifications (e.g. dehydrogenation) upon deposition on a reactive substrate. In this context a fundamental understanding of the molecule/metal interface before and after dehydrogenation of the selected molecular unit is essential. To this end DHBQ (2,5-dihydroxyl-benzoquinone), a prototypical molecular building block for metal-organic networks, was investigated on the Cu(111) surface. It was found that the dehydrogentation of DHBQ can be thermally activated. Moreover, depending on the degree of dehydrogenation of the molecular layer different superstructures form on the surface. These different molecular phases were investigated by means of x-ray photoemission spectroscopy, low-energy electron diffraction and normal incidence x-ray standing wave.