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O: Fachverband Oberflächenphysik
O 55: Organic Molecules on Inorganic Substrates IV: Adsorption and Growth II
O 55.3: Talk
Wednesday, March 29, 2023, 15:30–15:45, CHE 91
Exploiting Cooperative Catalysis for the On-Surface Synthesis of Linear Heteroaromatic Polymers via Selective C-H Activation — Xunshan Liu1, Adam Matej2,3, Tim Kratky4, Jesús I. Mendieta-Moreno2, Sebastian Günther4, Pingo Mutombo2, Silvio Decurtins1, Ulrich Aschauer1, Jascha Repp5, Pavel Jelinek2,3, Shi-Xia Liu1, and •Laerte L. Patera4,5,6 — 1Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Bern, Switzerland — 2Institute of Physics of Czech Academy of Sciences, Prague, Czech Republic — 3Regional Centre of Advanced Technologies and Materials, Palacký University Olomouc, Olomouc, Czech Republic — 4Department of Chemistry, Technical University of Munich, Garching, Germany — 5Institute of Experimental and Applied Physics, University of Regensburg, Regensburg, Germany — 6Institute of Physical Chemistry, University of Innsbruck, Austria
Regiospecific C-H activation is a promising approach to achieve extended polymers. Herein, selective C-H activation for dehydrogenative C-C couplings of hexaazatriphenylene by Scholl reaction on Ag(111) is reported. By means of low-temperature scanning probe microscopy, we revealed the formation of one-dimensional polymers with a double-chain structure [1]. The growth process is rationalized by density functional theory calculations, pointing out a cooperative catalytic action of Na and Ag adatoms in steering the selective polymerization.
[1] X. Liu, et al., Angew. Chem. Int. Ed. 2013 61.5 (2022): e202112798.