Berlin 2018 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 11: Focus Session: Molecular Nanostructures on surfaces - New Concepts towards Complex Architectures I
O 11.11: Vortrag
Montag, 12. März 2018, 18:00–18:15, MA 004
Self-assembly and on-surface reaction of bromo-substituted decacyclene on Ag(111) — •Shadi Sorayya1, Sachin Menon1, Jörg Tomada2, Konstantin Amsharov2, and Sabine Maier1 — 1Department of Physics, FAU Erlangen-Nürnberg — 2Department of Chemistry and Pharmacy, FAU Erlangen-Nürnberg
Controlling and understanding the self-assembly of chiral molecular building blocks on surfaces is essential for chiral separation and recognition. Here, we report on the self-assembly and on-surface reaction of chiral bromo-substituted decacyclene molecules adsorbed on Ag(111) using high-resolution scanning tunneling microscopy at low temperatures. The steric repulsion between adjacent hydrogen atoms at the peripheral naphthalene units of the decacyclene derivative leads to a twist in the molecular scaffold, and hence several chiral conformers are found upon adsorption on the surface. We observe compact and porous organo-metallic networks upon annealing because of the complex interplay between intermolecular forces and chirality of the constituent molecules. The structural properties of the networks and the chirality will be discussed in detail. Interestingly, we see a transition from homochiral to heterochiral networks upon annealing.