Li Jia-Nian, Li Ning-Fang, Wang Ji-Lei, Liu Xiao-Mei, Ping Qing-Dong, Zang Ting-Ting, Mei Hua, Xu Yan
College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211800, P. R. China.
State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210023, P. R. China.
Dalton Trans. 2021 Oct 12;50(39):13925-13931. doi: 10.1039/d1dt02390j.
Designing and synthesizing lanthanide clusters have always been a research hotspot. Herein, three lanthanide clusters with the formula [Ln(IN)(μ-OH)(μ-OH)(HO)]·HO (Ln = 1-Gd and = 11; Ln = 2-Dy and = 8; Ln = 3-Eu and = 8) have been isolated in the presence of isonicotinic acid under solvothermal conditions. Structural analysis indicates that those three compounds are isostructural, featuring boat-shaped {Ln} metal frameworks. Magnetic measurements reveal that 1-Gd exhibits a larger MCE with the maximum -Δ value of 31.77 J kg K at 2 K for Δ = 7 T, while 2-Dy displays slow magnetization relaxation. Besides, the photoluminescence properties of 3-Eu were investigated.
设计和合成镧系元素簇一直是一个研究热点。在此，在溶剂热条件下，于异烟酸存在的情况下分离出了三种化学式为[Ln(IN)(μ-OH)(μ-OH)(HO)]·HO的镧系元素簇（Ln = 1-Gd且 = 11；Ln = 2-Dy且 = 8；Ln = 3-Eu且 = 8）。结构分析表明这三种化合物是同构的，具有船形的{Ln}金属骨架。磁性测量显示，1-Gd表现出更大的磁热效应，在2 K时，对于Δ = 7 T，其最大-Δ值为31.77 J kg K，而2-Dy表现出缓慢的磁化弛豫。此外，还研究了3-Eu的光致发光性质。
