Dresden 2011 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 3: Metal substrates: Adsorption of organic / bio molecules I

O 3.3: Vortrag

Montag, 14. März 2011, 11:45–12:00, PHY C213

Robust metal-organic networks with carbonitrile group functionalized polyphenyl backbones — •Matthias Marschall¹, Joachim Reichert¹, Florian Klappenberger¹, Willi Auwärter¹, Knud Seufert¹, Svetlana Klyatsakya², Mario Ruben^2,3, and Johannes V. Barth¹ — ¹Physik Department E20, TU München, James Frank Str., D-85748 Garching — ²Institut für Nanotechnologie, Karlsruhe Institute of Technology, D-76021 Karlsruhe — ³Université de Strasbourg, IPCMS, 22, Rue de Loess, F-67034 Strasbourg

During the last years metal directed assembly has been used to fabricate robust supramolecular nanostructures on metal surfaces. To determine the relevant interactions in the realized coordination networks scanning tunneling microscopy (STM) has been employed at low- and at room-temperature. Herein we report on structural changes in the 2D pattern formation on Cu(111) and Ag(111) induced by the position of functional carbonitrile groups in polyphenyl backbones. The observed structures range from highly ordered metal-organic honeycomb lattices to 2D random networks. A complex interplay of molecular interactions, substrate templating effects and molecular degrees of freedom steer the self assembling process in the observed structures and controls the coordination number of the metal coordination center.