Berlin 2018 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 81: Poster Focus Session: Molecular Nanostructures on Surfaces - New Concepts towards Complex Architectures

O 81.6: Poster

Mittwoch, 14. März 2018, 18:15–20:30, Poster A

Supramolecular networks of arylene-alkynylenes on HOPG: STM studies — •Tristan J. Keller, Georgiy Poluektov, Stefan-S. Jester, and Sigurd Höger — Universität Bonn, Kekulé-Institut für Organische Chemie und Biochemie, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany

We report about the synthesis and 2D supramolecular self-assembly of shape persistent arylene-alkynylene macrocycles at the solid/liquid interface on HOPG. The molecules form complex supramolecular architectures that ar imaged by scanning tunneling microscopy with submolecular resolution. The flexible alkyl/alkoxy side chains interdigitate intermolecularly and stabilize the network formation. The investigation aims at detailed understanding on how the pattern structures and lattice constants depend on the exact shape of the backbones as an effect of the respective corner units and the strain induced by them. In addition, the role of experimental parameters (concentration, thermal annealing) is investigated. [1] P. Wilhelm, J. Vogelsang, G. Poluektov, N. Schönefelder, T. J. Keller, S.-S. Jester, S. Höger, J. M. Lupton, Angew. Chem. Int. Ed. 2017, 56, 1234-1238.