Regensburg 2013 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 58: Poster Session III (Solid-liquid interfaces; Scanning probe and other methods; Electronic structure theory; Spin-orbit interaction)
O 58.12: Poster
Mittwoch, 13. März 2013, 18:15–21:45, Poster B1
Self-assembled monolayers of molecular spoked wheels: Scanning tunneling microscopy — •Stefan-S. Jester1, Vikas Aggarwal1, Alissa Idelson1, Alexander Thiessen2, Daniel Kalle1, Dominik Würsch3, Thomas Stangl3, Florian Steiner3, Jan Vogelsang2, John M. Lupton2,3, and Sigurd Höger1 — 1Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Str. 1, 53121 Bonn, Germany — 2Department of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112, USA — 3Institut für Experimentelle und Angewandte Physik, Universität Regensburg, 93040 Regensburg, Germany
Shape-persistent molecular polygons can be viewed as a combination of rigid molecular rod units and corners. The stiffness of the molecules is related to the persistence length of the sides, arylene-alkynylene rods, and the rotational degree of freedom of the corner units. For corner/side numbers n<3 such molecules can deform out of their plane by rotation of the corner joints. Nevertheless, shape-persistence can be established by intraannular rigid spoke units to yield molecular spoked wheels.[1,2] STM investigation of adlayers of these molecules and its smaller subunits at the solid/liquid interface (e.g. 1-octanoic acid/graphite) yields a submolecularly resolved insight into the molecular architectures and their adsorbate pattern formation.
[1] D. Mössinger, D. Chaudhuri, T. Kudernac, S. Lei, S. De Feyter, J. M. Lupton, S. Höger, J. Am. Chem. Soc. 2010, 132, 1410. [2] D. Mössinger, J. Hornung, S. Lei, S. De Feyter, S. Höger, Angew. Chem. Int. Ed. 2007, 46, 6802.