Berlin 2024 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 103: Focus Session: Molecular Nanostructures on Surfaces: On-Surface Synthesis and Single-Molecule Manipulation IV
O 103.5: Vortrag
Freitag, 22. März 2024, 11:45–12:00, HE 101
Tuning the planarity of a thiantherene-based molecule on Au(111) — Kwan Ho Au-Yeung1, Suchetana Sarkar1, Sattwick Haldar2, •Pranjit Das1, Dmitry A. Ryndyk3,4, Andreas Schneemann2, and Francesca Moresco1 — 1Center for Advancing Electronics Dresden, TU Dresden, 01062 Dresden, Germany — 2Inorganic Chemistry I, TU Dresden, 01069 Dresden, Germany — 3Institute for Materials Science, TU Dresden, 01062 Dresden, Germany — 4Theoretical Chemistry, TU Dresden, 01062 Dresden, Germany
We conducted a comprehensive study on the adsorption geometries of a non-planar aromatic thianthrene-based molecule on the Au(111) surface by scanning tunneling microscopy. The molecules demonstrate two self-assembled structures depending on the orientation of the C-S-C bonds: close-packed islands where they are non-planar and quasi one-dimensional chains where they are planar. Using the STM tip to isolate a molecule from the island, it is observed that the non-planar molecules transform into the planar configuration.
Keywords: Thianthrene; scanning tunneling microscopy; non-planar aromatic molecules; adsorption geometry; density functional theory