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 [Dy^III₂Ni^II₄] cluster, which is built by two triangular [Dy^IIINi^II₂] 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.

中文翻译：

---

优异的耐碱 DyIII2NiII4 单分子磁铁

分子式[Dy ₂ Ni ₄ (L) ₈ (CH ₃ COO) ₄ (NO ₃ ) ₂ ] ( 1 ) (HL = 8-羟基喹啉)结构和磁性特征。单晶 X 射线衍射表明1具有一个六核[Dy ^III ₂ Ni ^II ₄ ] 簇，它由两个三角形 [Dy ^III Ni ^II ₂ ] 核通过两个 CH ₃ COO ^-离子双桥接而成。有趣的是，1在稀酸和普通碱性溶液（如三乙胺和NaOH）中可以保持其原始结构。更重要的是，1在室温下用 20 M NaOH 水溶液处理 1 个月后仍然稳定。磁性测量发现1是零外加场下的 SMM，U _eff = 7.43 K。据我们所知，1是具有如此极端耐碱性的 3d-4f SMM 的第一个例子。这项工作将拓宽制备具有优异化学稳定性的 SMM 材料的视野。