Magnetic refrigeration and single-molecule magnet behavior of two rhombus-shaped Ln(III)4 (Ln = Gd, Dy) clusters

被引：7
作者：
Liu, Lu [1 ]
Cai, Chun-Zhu [2 ]
Wu, Ru-Fen [2 ]
Zhang, Yu-Quan [1 ]
Li, Changgong [1 ]
Zhang, Yu-Ping [1 ]
Wang, Jianji [4 ]
Wang, Wen-Min [2 ,3 ]
机构：
[1] Henan Inst Sci & Technol, Sch Chem & Chem Engn, Xinxiang 453003, Henan, Peoples R China
[2] Taiyuan Normal Univ, Dept Chem, Jinzhong 030619, Peoples R China
[3] Nankai Univ, Minist Educ, Key Lab Adv Energy Mat Chem, Tianjin 300071, Peoples R China
[4] Henan Normal Univ, Sch Chem & Chem Engn, Xinxiang 453007, Henan, Peoples R China
来源：
POLYHEDRON | 2019年 / 158卷
关键词：
Tetranuclear lanthanide(III) clusters; Rhombus-shaped arrangement; Magnetic properties; Magnetic refrigeration; Single molecule magnets behaviors; LANTHANIDE(III) DINUCLEAR COMPLEXES; RELAXATION; DYNAMICS; LN(4); TRIANGLES; DESIGN; SERIES;
D O I：
10.1016/j.poly.2018.11.006
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Two tetranuclear lanthanide(III) clusters, [Gd-4(mu(3)-OH)(2)L-6(dbm)(4)].solvent, (1, Ln = Gd-III, solvent = 2CH(3)CN center dot 2CH(2)Cl(2) and 2, Ln = Dy-III, solvent = 6CH(3)CN; HL = 5-(4-o-hydroxybenzylidene)-8-hydroxylquinoline; dbm = 1,3-diphenyl-1,3-propanedione), were characterized in terms of structure and magnetism. The X-ray structural analysis exhibit that clusters 1 and 2 contain one Ln4 center with rhombus-shaped arrangement, and each Ln(III) ion of them is located in a distorted square-antiprismatic coordination sphere. Magnetic measurements indicate that 1 show magnetic refrigeration (-Delta S-m = 13.91 J kg(-1) K-1 for Delta H = 7.0 T at 3.0 K) and 2 display single molecule magnets behaviors with energy barrier (Delta E/k(B)) of 52.65 K and tau(0) = 7.01 x 10(-7) s. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码：365 / 370
页数：6
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