Berlin 2015 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 41: Inorganic/Organic Interfaces
O 41.48: Poster
Dienstag, 17. März 2015, 18:15–21:00, Poster B
STM investigations of functional platform adlayers on Au(111) surfaces — •Talina Rusch1, Sonja Lemke1, Sandra Ulrich2, Hanne Jakob3, Felix Tuczek3, Rainer Herges2, and Olaf Magnussen1 — 1Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität Kiel — 2Institut für Organische Chemie, Christian-Albrechts-Universität Kiel — 3Institut für Anorganische Chemie, Christian-Albrechts-Universität Kiel
The controlled assembly of functional molecules on metal surfaces is an important research topic. We have introduced the so called platform approach, where the Triazatriangulenium (TATA) [1,2,3] or Trioxatriangulenium (TOTA) [4] ions are used as molecular platforms which can be functionalized at the central carbon atom as well as by alkyl side chains to control their steric demand. Using this versatile concept, it is possible to control the orientation and distance of the functional group with respect to the surface and the intermolecular distance. Here, detailed STM investigations of TATA adlayer structures as a function of alkyl side chain length are presented as well as structural investigations of new azobenzene functionalized TATA adsorbate layers, namely methoxy-azobenzene-octyl-TATA adlayers. Additionally, we present the reversible switching of these adlayers by infrared reflection absorption spectroscopy [5] as well as UV/Vis spectroscopy.
[1] Baisch et al., J. Am. Chem. Soc. (2009), 131, 442. [2] Kuhn et al., PCCP (2010), 12, 4481. [3] Kubitschke et al., Eur. J. Org. Chem. (2010), 5041. [4] Kuhn et al., Chem. Commun., 2011, 47, 8880-8882 [5] Jacob et al., Phys. Chem. Chem. Phys., 2014, 13, 22643