Dresden 2020 – scientific programme

The DPG Spring Meeting in Dresden had to be cancelled! Read more ...

Parts | Days | Selection | Search | Updates | Downloads | Help

O: Fachverband Oberflächenphysik

O 74: Nanostructured Surfaces and Thin Films I: Synthesis and Properties (joint session O/CPP)

O 74.8: Talk

Wednesday, March 18, 2020, 16:45–17:00, WIL B321

Ultra Large Lifting Installations (ULLIS) on HOPG — •Tristan J. Keller, Georgiy Poluektov, Anna Jochemich, Anna Krönert, Stefan-Sven Jester, and Sigurd Höger — Kekulé-Institut für Organische Chemie und Biochemie, Bonn, Deutschland

Self-assembled monolayers at the solid/liquid interface on graphite (HOPG) are investigated by scanning tunneling microscopy (STM). Recently, we reported i-gonal arylene-alkynylene macrocycles (i = 3,4,5,6) that form tiling patterns that correspond to the macrocycle shapes and the interdigitation of adjunct -OC16H33 side chains.^[1]

Here, we present a novel approach for supramolecular surface patterning incorporating a tetraphenylmethane building block into a shape-persistent macrocycle in order to address the volume phase above the substrate. We observe monolayers with lattice constants in the range of 10 nm that are independent of the exact substitution of the pillar unit (e.g. propargylic alcohol, or fullerene). In addition, we present cocrystals of these triangular species and a molecular hexagon. The research aims at a detailed understanding on how functional groups that point into the third dimension can be incorporated in appropriate systems.

[1] S.-S. Jester, E. Sigmund, S. Höger, J. Am. Chem. Soc. 2011, 133, 29, 11062-11065.