Three Ln2 compounds (Gd2, Tb2 and Dy2) with a Ln2O2 center showing magnetic refrigeration property and single-molecular magnet behavior

被引：6
作者：
Qiao, Na [1 ,2 ]
Li, Xiao-Xiao [2 ]
Chen, Ying [2 ]
Xin, Xiao-Yan [2 ]
Yang, Chen [2 ]
Dong, Shan-Shan [2 ]
Wang, Yan-Zi [2 ]
Li, Xing-Jin [2 ]
Hua, Yu-Peng [1 ]
Wang, Wen-Min [2 ]
机构：
[1] Ordos Inst Technol, Ordos 017000, Inner Mongolia, Peoples R China
[2] Taiyuan Normal Univ, Dept Chem, Jinzhong 030619, Peoples R China
来源：
POLYHEDRON | 2022年 / 215卷
关键词：
Dinuclear lanthanide compounds; Crystal structures; Magnetocaloric effect; Single-molecular magnet behavior; SCHIFF-BASE; FLUORESCENCE PROPERTIES; DICARBOXYLATE LIGANDS; DINUCLEAR COMPLEXES; HYDRAZONE LIGAND; LNIII4; CLUSTERS; LN; RELAXATION; SERIES; DY(III);
D O I：
10.1016/j.poly.2022.115675
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Three dinuclear Ln(2) compounds, [Ln(2)(dbm)(4)(L-)(2)].4CH(3)CN (Ln = Gd (1), Tb (2), Dy (3), HL = (E)-N'-(2-hydroxybenzylidene)benzohydrazide and dbm = dibenzoylmethane), have been obtained by a solvent evaporation method. The structural analyses indicate that the three Ln(2) compounds (Gd-2, Tb-2 and Dy-2) are isostructural with a Ln(2)O(2) center. Magnetic investigations show the presence of magnetic refrigeration in the Gd-based compound with a -& UDelta;S-m value of 17.62 J kg(-1) K-1 (T = 2.0 K and & UDelta;H = 7.0 T); for compound 3, however, single-molecular magnet behavior (SMM) was observed (U-eff/k(B) = 0.84 K and tau(0) = 1.08 x 10(-5)s).
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页数：7
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