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O: Fachverband Oberflächenphysik

O 17: Poster Focus Session Molecular Nanostructures on Surfaces: On-Surface Synthesis and Single-Molecule Manipulation

O 17.3: Poster

Montag, 17. März 2025, 18:00–20:00, P2

Exploring supramolecular rings by scanning tunneling microscopy — •Cagri Turan¹, Elie Benchimol², Guido Clever², and Karina Morgenstern¹ — ¹Physical Chemistry I, Ruhr-Universität Bochum, Germany — ²Inorganic Chemistry, Technische Universität Dortmund, Germany

Enzymes inspire the design of supramolecular systems, mimicking their catalytic functions for advanced material applications. Among these systems, supramolecular rings and cages are one of the most suitable candidates for mimicking enzyme-like behavior. The use of two different ligands in the heteroleptic supramolecular rings enhances their complexity, enabling the creation of structures that resemble the sophisticated architectures of enzymes. This study reports deposition, self-assembly and inelastic electron tunneling manipulation of PdL2 rings on the Ag(111) surface. The ring molecules were characterized using low-temperature scanning tunneling microscopy in ultra-high vacuum at 7 K. By utilizing an atomic layer injection system, the acetonitrile solvent, used as a solvent during the self-assembly of ligands, will evaporate before the molecules reach the surface, ensuring that only the ring molecules are deposited onto the substrate. Through inelastic electron tunneling manipulation, site-specific manipulations and ligand dissociation processes were explored, offering insights into reaction mechanisms and molecular dynamics on rings on the metallic substrate. The findings contribute to understanding the interaction of supramolecular systems with metal surfaces, enabling advancements in nanoscale functional materials.

Keywords: Scanning tunneling microscopy; Supramolecular chemistry; Surface Science