Berlin 2024 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 25: Organic Molecules on Inorganic Substrates III: Adsorption & Growth
O 25.10: Vortrag
Dienstag, 19. März 2024, 12:45–13:00, MA 043
Analysis of thiahelicene non-covalent molecular wires using nc-AFM — •Gema Navarro1, Antoine Hinaut1, Shuyu Huang1, Yunbin Hu2, Thilo Glatzel1, Akimitsu Narita2, and Ernst Meyer1 — 1Department of Physics, University of Basel, Klingelbergstrasse 82, 4056 Basel, Switzerland. — 2Max Plank Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany.
Helicene derivatives are widely used in the field of Circularly Polarized Organic Light-Emitting Diodes (CP-OLEDs)[1] due to their chiroptical properties. According to previous reports an enhancement in their optical response have been obtained by means of the self-assembled formation. The surface science studies are beneficial for the further comprehension of this phenomena. On surface, the zigzag twin row configuration constitutes by far the predominant molecular phase formed on metal surfaces, however factors such as temperature, surface nature and heteroatoms incorporation have been shown to have an strong influence in the self assembled pattern.
In this work, we addressed the study of the adsorption of a sulfur-containing double helicene on Cu(111) surface. Formation of non-covalent molecular wires, widely spread on the terraces, were observed after the deposit and gentle annealing. The wires symmetry indicates an strong influence with the surface. Furthermore, this configuration was observed at low, medium and high coverage regimen. All the images presented were acquired at room temperature by means a home-built nc-AFM microscope under UHV conditions.
[1] Meng, G. et al. Adv. Mater. 2023, 2307420.
Keywords: Helicene; adsorption; nc-AFM