SKM 2023 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 55: Organic Molecules on Inorganic Substrates IV: Adsorption and Growth II

O 55.3: Vortrag

Mittwoch, 29. März 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 Matej^2,3, Tim Kratky⁴, Jesús I. Mendieta-Moreno², Sebastian Günther⁴, Pingo Mutombo², Silvio Decurtins¹, Ulrich Aschauer¹, Jascha Repp⁵, Pavel Jelinek^2,3, Shi-Xia Liu¹, and •Laerte L. Patera^4,5,6 — 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.