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On-surface assembly of hydrogen- and halogen-bonded supramolecular graphyne-like networks

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 t...

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Main Authors: Yang, Zechao (Author) , Fromm, Lukas (Author) , Sander, Tim (Author) , Gebhardt, Julian (Author) , Schaub, Tobias A. (Author) , Görling, Andreas (Author) , Kivala, Milan (Author) , Maier, Sabine (Author)
Format: Article (Journal)
Language:English
Published: 2020
In: Angewandte Chemie. International edition
Year: 2020, Volume: 59, Issue: 24, Pages: 9549-9555
ISSN:1521-3773
DOI:10.1002/anie.201916708
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1002/anie.201916708
Verlag, lizenzpflichtig, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/anie.201916708
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Author Notes:Zechao Yang, Lukas Fromm, Tim Sander, Julian Gebhardt, Tobias A. Schaub, Andreas Görling, Milan Kivala, and Sabine Maier
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Summary: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 X3-synthon, which is commonly observed for bromobenzene derivatives, is weaker than the X6-synthon for our bromotriethynyl derivatives.
Item Description:First published: 03 March 2020
Gesehen am 26.09.2022
Physical Description:Online Resource
ISSN:1521-3773
DOI:10.1002/anie.201916708

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