Superb Alkali-Resistant DyIII2NiII4 Single-Molecule Magnet

A superb alkali-resistant single-molecule-magnet (SMM) material with the molecular formula [Dy2Ni4(L)(8)(CH3COO)(4)(NO3)(2)] (1) (HL = 8-hydroxyquinoline) has been structurally and magnetically characterized. Singlecrystal X-ray diffraction revealed that 1 possesses a hexanuclear [(Dy2Ni4II)-Ni-III] cluster, which is built by two triangular [(DyNi2II)-Ni-III] cores double-bridged through two CH3COO- ions. Interestingly, 1 can keep its original structure in dilute acid and common basic solutions (e.g., triethylamine and NaOH). More importantly, 1 is still stable after treatment with a 20 M NaOH aqueous solution for 1 month at room temperature. Magnetic measurements uncovered that 1 is an SMM under zero applied field with U(ef)f = 7.43 K. To the best of our knowledge, 1 is the first example of a 3d-4f SMM with such extreme alkali resistance. This work will broaden the vision of preparing SMM materials with excellent chemical stability.

Automated summary

The newly developed alkali-resistant single-molecule magnet material has a unique structure and magnetic properties, remaining stable in alkaline solutions. Magnetic measurements revealed it to be an SMM, which will help broaden the research perspective on preparing SMM materials with excellent chemical stability.