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O: Fachverband Oberflächenphysik

O 11: Surface Reactions

O 11.5: Talk

Monday, March 27, 2023, 16:00–16:15, CHE 91

On-Surface CO₂ Capturing by Electron-Rich Phosphines: Comparison of the Assembly on Ag(100) and on the NaBr(100) Double Layer — •Vladimir Lykov¹, Florenz Buss², Fabian Dielmann³, and Karina Morgenstern¹ — ¹Ruhr-Universität Bochum, Germany — ²Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Germany — ³Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck, Center for Chemistry and Biomedicine, Innsbruck, Austria

Electron-rich phosphines exhibit exceptional electron donor properties and form zwitterionic Lewis base adducts with small inert molecules, for instance, carbon dioxide (CO₂) and sulfur dioxide (SO₂) [1]. The main focus of this project is understanding the influence of geometrical confinement on the capturing of CO₂ by electron-rich phosphines. The effect of geometrical confinement is studied with a surface science approach. For this purpose, we use a low-temperature (7 K) scanning tunneling microscope (STM). To understand the influence of the metal surface on carbon dioxide capture, we compare the molecules adsorbed on Ag(100) to those on NaBr(100) double layer, supported by Ag(100). The subsequent deposition of carbon dioxide and electron-rich phosphines confirmed the affinity of CO₂ to these phosphines. The influence of the two surfaces on the product assembly will be discussed in this presentation.

[1] F. Buß, et al. Chem. Eur. J. 2022, 28, e2021040.