Complex k-uniform tilings by a simple bitopic precursor self-assembled on Ag(001) surface

Lukáš Kormoš, Pavel Procházka, Anton O. Makoveev and Jan Čechal ()
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Lukáš Kormoš: CEITEC – Central European Institute of Technology, Brno University of Technology, Purkyňova 123
Pavel Procházka: CEITEC – Central European Institute of Technology, Brno University of Technology, Purkyňova 123
Anton O. Makoveev: CEITEC – Central European Institute of Technology, Brno University of Technology, Purkyňova 123
Jan Čechal: CEITEC – Central European Institute of Technology, Brno University of Technology, Purkyňova 123

Nature Communications, 2020, vol. 11, issue 1, 1-6

Abstract: Abstract The realization of complex long-range ordered structures in a Euclidean plane presents a significant challenge en route to the utilization of their unique physical and chemical properties. Recent progress in on-surface supramolecular chemistry has enabled the engineering of regular and semi-regular tilings, expressing translation symmetric, quasicrystalline, and fractal geometries. However, the k-uniform tilings possessing several distinct vertices remain largely unexplored. Here, we show that these complex geometries can be prepared from a simple bitopic molecular precursor – 4,4’-biphenyl dicarboxylic acid (BDA) – by its controlled chemical transformation on the Ag(001) surface. The realization of 2- and 3-uniform tilings is enabled by partially carboxylated BDA mediating the seamless connection of two distinct binding motifs in a single long-range ordered molecular phase. These results define the basic self-assembly criteria, opening way to the utilization of complex supramolecular tilings.

Date: 2020
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DOI: 10.1038/s41467-020-15727-6

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