Superb Alkali-Resistant DyIII 2NiII 4 Single-Molecule Magnet

• Published in: Inorganic chemistry 2021-10, Vol.60 (19), p.14752-14758
• Main Authors: Yang, Panpan, Hu, Huancheng, Yu, Shui, Liu, Dongcheng, Liang, Yuning, Zou, Huahong, Liang, Fupei, Chen, Zilu
• Format: Article
• Language: English
• ISSN: 0020-1669; 1520-510X
• DOI: 10.1021/acs.inorgchem.1c01963

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. Single-crystal X-ray diffraction revealed that 1 possesses a hexanuclear [DyIII 2NiII 4] cluster, which is built by two triangular [DyIIINiII 2] 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 eff = 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.