TY - JOUR
T1 - Chemical Design and Magnetic Ordering in Thin Layers of 2D Metal-Organic Frameworks (MOFs)
AU - López-Cabrelles, Javier
AU - Mañas-Valero, Samuel
AU - Vitórica-Yrezábal, Iñigo J.
AU - Šiškins, Makars
AU - Lee, Martin
AU - Steeneken, Peter G.
AU - Van Der Zant, Herre S.J.
AU - Mínguez Espallargas, Guillermo
AU - Coronado, Eugenio
PY - 2021
Y1 - 2021
N2 - 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 centers (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.
AB - 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 centers (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.
UR - http://www.scopus.com/inward/record.url?scp=85119285543&partnerID=8YFLogxK
U2 - 10.1021/jacs.1c07802
DO - 10.1021/jacs.1c07802
M3 - Article
AN - SCOPUS:85119285543
SN - 0002-7863
VL - 143
SP - 18502
EP - 18510
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 44
ER -