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O: Fachverband Oberflächenphysik
O 14: Poster Session I: Nanostructures at surfaces I
O 14.3: Poster
Montag, 1. März 2021, 10:30–12:30, P
Adsorption Geometry and Intramolecular Reactions of 9-bromo-10- (1,1':3',1''-terphenyl-5'-yl)anthracene on Au(111) and Cu(111) — •Alexander Ihle1, Daniel Ebeling1, Doreen Mollenhauer2, Hermann A. Wegner3, and Andre Schirmeisen1 — 1Institute of Applied Physics, Justus Liebig University Giessen, Germany — 2Institute of Physical Chemistry, Justus Liebig University Giessen, Germany — 3Institute of Organic Chemistry, Justus Liebig University Giessen, Germany
On-surface chemistry is a powerful tool for building covalent molecular structures such as chains or graphene nanoribbons [1, 2]. Such tailored materials are interesting for future applications since their optical and electronic properties are controllable via their structure [3]. Furthermore, their main component carbon is environmentally friendly and sustainable. In addition to the structure of the precursors, the chemical properties of the substrate direct the reaction pathway. Using low-temperature atomic force microscopy with CO-functionalized tips, we identify the precise adsorption geometry of the pristine molecules, intermediates, and reaction products after subsequent heating steps. While the pristine molecules show similar features on both surfaces and adsorb quasi-planar, the adsorption geometry of the intermediates differs after heating depending on the substrate material. We suspect that different molecule-substrate interactions lead to this observation.
[1] Grill, L. et al. Nature Nanotechnology 2, 687-691 (2007)
[2] Cai, J. et al. Nature 466, 470-473 (2010)
[3] Zhong, Q. et al. J. Am. Chem. Soc. 141, 7399-7406 (2019)