Chemical design and magnetic ordering in thin layers of 2D MOFs
| Autor: | López-Cabrelles, Javier, Mañas-Valero, Samuel, Vitórica-Yrezábal, Iñigo J., Šiškins, Makars, Lee, Martin, Steeneken, Peter G., van der Zant, Herre S. J., Espallargas, Guillermo Mínguez, Coronado, Eugenio |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Journal of the American Chemical Society 143, 44, 18502 (2021) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1021/jacs.1c07802 |
| Popis: | Through rational chemical design, and thanks to the hybrid nature of metal-organic frameworks (MOFs), it is possible to prepare molecule-based 2D magnetic materials stable at ambient conditions. Here, we illustrate the versatility of this approach by changing both the metallic nodes and the ligands in a family of layered MOFs that allows the tuning of their magnetic properties. Specifically, the reaction of benzimidazole-type ligands with different metal centres (MII = Fe, Co, Mn, Zn) in a solvent-free synthesis produces a family of crystalline materials, denoted as MUV-1(M), which order antiferromagnetically with critical temperatures that depend on M. Furthermore, the incorporation of additional substituents in the ligand results in a novel system, denoted as MUV-8, formed by covalently bound magnetic double-layers interconnected by van der Waals interactions, a topology that is very rare in the field of 2D materials and unprecedented for 2D magnets. These layered materials are robust enough to be mechanically exfoliated down to a few layers with large lateral dimensions. Finally, the robustness and crystallinity of these layered MOFs allow the fabrication of nanomechanical resonators that can be used to detect -- through laser interferometry -- the magnetic order in thin layers of these 2D molecule-based antiferromagnets. Comment: Main Text + Supplementary Information |
| Databáze: | arXiv |
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