Regensburg 2022 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 6: Nanostructures at Surfaces 1
O 6.2: Vortrag
Montag, 5. September 2022, 10:45–11:00, S052
Constructing covalent organic nanoarchitectures molecule by molecule via scanning probe manipulation — Qigang Zhong1,2, Alexander Ihle1,2, Sebastian Ahles2,3, Hermann A. Wegner2,3, Andre Schirmeisen1,2, and •Daniel Ebeling1,2 — 1Institute of Applied Physics, Justus Liebig University Giessen, Germany. — 2Center for Materials Research, Justus Liebig University Giessen, Germany. — 3Institute of Organic Chemistry, Justus Liebig University Giessen, Germany
Constructing low-dimensional covalent assemblies with tailored size and connectivity is challenging yet often key for applications in molecular electronics where optical and electronic properties of the quantum materials are highly structure dependent. We present a versatile approach for building such structures block by block on bilayer sodium chloride (NaCl) films on Cu(111) with the tip of an atomic force microscope, while tracking the structural changes with single-bond resolution. Covalent homo-dimers in cis and trans configurations and homo-/hetero-trimers were selectively synthesized by a sequence of dehalogenation, translational manipulation and intermolecular coupling of halogenated precursors. Further demonstrations of structural build-up include complex bonding motifs, like carbon-iodine-carbon bonds and fused carbon pentagons. This work paves the way for synthesizing elusive covalent nanoarchitectures, studying structural modifications and revealing pathways of intermolecular reactions.
Nature Chemistry 13, 1133-1139 (2021)