SKM 2023 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 72: Gerhard Ertl Young Investigator Award Competition
O 72.5: Vortrag
Donnerstag, 30. März 2023, 12:30–13:00, CHE 89
Single-molecule synthesis by scanning probe manipulation of intra- and inter-molecular reactions — •Qigang Zhong1,2, Artur Mardyukov2,3, Ephrath Solel2,3, Alexander Ihle1,2, Daniel Ebeling1,2, Peter R. Schreiner2,3, and André Schirmeisen1,2 — 1Institute of Applied Physics, Justus Liebig University Giessen (JLU), Germany — 2Center for Materials Research, JLU, Germany — 3Institute of Organic Chemistry, JLU, Germany
Single-molecule synthesis by scanning probe manipulation has emerged as a powerful tool not only to visualize, but also to generate and couple highly reactive molecules, which often are not accessible by traditional synthetic methods. As an example of precise "intra-molecular surgery", we demonstrate the on-surface synthesis of the structurally elusive cyclotriphosphazene (P3N3) based on STM tip-induced sextuple dechlorination of a sub-nanometer P3N3Cl6 precursor molecule on a Cu(111) surface [1]. Real-space atomic-level imaging of P3N3 reveals its planar D3h-symmetric ring structure. This method is further expanded to the inter-molecular level to construct covalent organic nanostructures molecule-by-molecule [2]. We have achieved unprecedented control over the whole reaction process including activation, lateral transfer and inter-molecular coupling of halogenated precursors on an inert NaCl surface. Our work presents strategies for synthesizing elusive molecules as well as covalent nanoarchitectures, studying structural modifications and revealing pathways of on-surface reactions.
[1] Preprint [https://doi.org/10.21203/rs.3.rs-2169632/v1]
[2] Nature Chemistry 13, 1133-1139 (2021)