Regensburg 2025 – scientific programme
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O: Fachverband Oberflächenphysik
O 68: Focus Session Molecular Nanostructures on Surfaces: On-Surface Synthesis and Single-Molecule Manipulation IV
O 68.8: Talk
Wednesday, March 19, 2025, 16:45–17:00, H24
Remote debromination on ultrathin insulating film — •Tzu-Chao Hung1, Lucía Gómez-Rodrigo2, Lennart Moritz1, Manuel Vilas-Varela2, Leo Gross3, Diego Peña2, and Jascha Repp1 — 1Institute of Experimental and Applied Physics, University of Regensburg, Germany — 2Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, Spain — 3IBM Research Europe, Zurich, Switzerland
Open-shell carbon-based structures are widely studied in recent years not only owing to their potential applications in spintronics and as quantum devices, but they can also serve as a platform to investigate electron-correlation phenomena. One way to study open-shell molecules despite their large reactivity, is to create them from a suitable precursor in a scanning probe microscope (SPM) under ultra-high-vacuum and low-temperature conditions. Here, we demonstrate a particularly efficient debromination reaction resulting in an open-shell molecule by means of SPM manipulation on ultrathin NaCl film on Cu(111). The debromination even works remotely with the tip being up to ~10 nm away from the molecule for both voltage polarities. Based on our observation, possible reaction mechanisms will be discussed.
Keywords: Debromination; Dehalogenation; Open-shell molecule; SPM manipulation; Scanning probe microscopy