On-Surface Assembly of Hydrogen- and Halogen-Bonded Supramolecular Graphyne-Like Networks

Overview

Journal Angew Chem Int Ed Engl

Specialty Chemistry

Date 2020 Mar 4

PMID 32126147

Citations 4

Authors

Zechao Yang

Lukas Fromm

Tim Sander

Julian Gebhardt

Tobias A Schaub

Andreas Gorling

Milan Kivala

Sabine Maier

Affiliations

Soon will be listed here.

Abstract

Demonstrated here is a supramolecular approach to fabricate highly ordered monolayered hydrogen- and halogen-bonded graphyne-like two-dimensional (2D) materials from triethynyltriazine derivatives on Au(111) and Ag(111). The 2D networks are stabilized by N⋅⋅⋅H-C(sp) bonds and N⋅⋅⋅Br-C(sp) bonds to the triazine core. The structural properties and the binding energies of the supramolecular graphynes have been investigated by scanning tunneling microscopy in combination with density-functional theory calculations. It is revealed that the N⋅⋅⋅Br-C(sp) bonds lead to significantly stronger bonded networks compared to the hydrogen-bonded networks. A systematic analysis of the binding energies of triethynyltriazine and triethynylbenzene derivatives further demonstrates that the X -synthon, which is commonly observed for bromobenzene derivatives, is weaker than the X -synthon for our bromotriethynyl derivatives.

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On-Surface Assembly of Hydrogen- and Halogen-Bonded Supramolecular Graphyne-Like Networks.

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PMID: 32126147 PMC: 7318139. DOI: 10.1002/anie.201916708.

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