Dresden 2014 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 62: Posters: Surface Reactions and Dynamics, Nanostructures
O 62.27: Poster
Mittwoch, 2. April 2014, 17:30–21:00, P1
STM investigations of functional platform adlayers on Au(111) surfaces — •Andreas Bloedorn1, Sonja Kuhn1, Frauke Claußen1, Ulrich Jung1, Sandra Ulrich2, Rainer Herges2, and Olaf Magnussen1 — 1Institut für Experimentelle und Angewandte Physik, Universität Kiel, 24098 Kiel, Germany — 2Otto Diels-Institut für Organische Chemie, Universität Kiel, 24098 Kiel, Germany
Functionalized adsorbate layers are of great interest for advanced nanosystems containing molecular switches, motors, or light harvesting systems. We employ triazatriangulenium (TATA) [1,2,3] or trioxatriangulenium (TOTA) [4] ions for attaching functional molecules to a metal surface. These molecular platforms can be functionalized at the central carbon atom as well as by alkyl side chains. 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 adlayers with alkyl side chains from propyl to dodecyl on Au(111) surfaces are presented, showing that the favoured hexagonal superstructure varies with the alkyl chain length. Furthermore, results on functionalized TATA derivatives containing azobenzene derivatives or porphyrins are shown.
This work was supported by the Deutsche Forschungsgemeinschaft via SFB 677.
[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.