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Growth of N-Heterocyclic Carbene Assemblies on Cu(100) and Cu(111): from Single Molecules to Magic-Number Islands

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Navarro,  Juan Jesus
Interface Science, Fritz Haber Institute, Max Planck Society;

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Landwehr,  Felix
Interface Science, Fritz Haber Institute, Max Planck Society;

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Heyde,  Markus
Interface Science, Fritz Haber Institute, Max Planck Society;

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Roldan Cuenya,  Beatriz
Interface Science, Fritz Haber Institute, Max Planck Society;

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Citation

Navarro, J. J., Das, M., Tosoni, S., Landwehr, F., Koy, M., Heyde, M., et al. (2022). Growth of N-Heterocyclic Carbene Assemblies on Cu(100) and Cu(111): from Single Molecules to Magic-Number Islands. Angewandte Chemie International Edition, 61(30): e202202127. doi:10.1002/anie.202202127.


Cite as: https://hdl.handle.net/21.11116/0000-000A-7D89-0
Abstract
N-Heterocyclic carbenes (NHCs) have superior properties as building blocks of self-assembled monolayers (SAMs). Understanding the influence of the substrate in the molecular arrangement is a fundamental step before employing these ligands in technological applications. Herein, we study the molecular arrangement of a model NHC on Cu(100) and Cu(111). While mostly disordered phases appear on Cu(100), on Cu(111) well-defined structures are formed, evolving from magic-number islands to molecular ribbons with coverage. This work presents the first example of magic-number islands formed by NHC assemblies on flat surfaces. Intermolecular interactions, diffusion and commensurability are key factors explaining the observed arrangements. These results shed light on the molecule-substrate interaction and open the possibility of tuning nanopatterned structures based on NHC assemblies.