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O: Fachverband Oberflächenphysik
O 34: Poster Session III: Organic molecules on inorganic substrates: Adsorption and growth III
O 34.5: Poster
Tuesday, March 2, 2021, 10:30–12:30, P
On-surface synthesis of BN-doped carbon nanostructures — •Tobias Weiss1, Aleksandr Baklanov1, Knud Seufert1, Johannes Küchle1, Marc Gonzalez Cuxart1, Francesco Allegretti1, Jacopo Dosso2, Davide Bonifazi2,4, Nicolas Bachellier3, Matthias Muntwiler3, and Willi Auwärter1 — 1Physics Department E20, Technical University of Munich, Germany — 2School of Chemistry, Cardiff University, Cardiff, UK — 3Paul Scherrer Institute, Villigen, Switzerland — 4Institute of Organic Chemistry, Faculty of Chemistry, University of Vienna, Austria
Hybrid hexagonal boron nitride - carbon (BNC) layers provide promising properties for potential applications in electronics and gas adsorption [1]. Recently, BNC-based tectons were introduced to assemble covalent networks and supramolecular arrays on metal surfaces [1-3].
Here, we report the formation of BNC nanostructures on Ag(111) and Au(111) via bottom-up synthesis from borazine derivatives in UHV. We employed both a dehydrogenation approach using a BN-doped coronene derivative and an Ullmann-type coupling approach using a chlorine- and bromine-functionalized hexaphenylborazine. The resulting 2D structures, the sequential dehalogenation steps, and the Ullmann coupling are investigated with (fast) XPS and STM. Additionally, we probed the CO, CO2, and borazine adsorption on the BNC structures, revealing the inertness of the borazine core.
[1] M. M. Lorenzo-García et al., Chimia, 2017 71, 9, 550-557.
[2] C. Sánchez-Sánchez et al., ACS Nano, 2015 9, 9, 922.
[3] M. Schwarz et al., Chem. Eur. J., 2018 24, 9565.