三维钆（III）-草酸盐配位框架中的磁热效应
Magnetocaloric Effect in 3D Gd(III)-Oxalate Coordination Framework.
作者信息
Lv Fang-Wen, Hong Mei-Xin, Wang Xue-Ting, Tian Haiquan, Wang Chun-Chang, Zheng Xiu-Ying
机构信息
Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, School of Materials Science and Engineering, Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China.
Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China.
出版信息
Nanomaterials (Basel). 2024 Dec 28;15(1):32. doi: 10.3390/nano15010032.
Cryogenic magnetic refrigerants based on the magnetocaloric effect (MCE) hold significant potential as substitutes for the expensive and scarce He-3. Gd(III)-based complexes are considered excellent candidates for low-temperature magnetic refrigerants. We have synthesized a series of Ln(III)-based metal-organic framework (MOF) (Ln = Gd/Dy) by the slow release of oxalates in situ from organic ligands (disodium edetate dehydrate (EDTA-2Na) and thiodiglycolic acid). Structural analysis shows that the is a neutral 3D framework with one-dimensional channels connected by [Ln(HO)] as nodes and CO as linkers. Magnetic measurements show that exhibits very weak antiferromagnetic interactions with a maximum -Δ value of 36.6 J kg K (-Δ = 74.47 mJ cm K) at 2 K and 7 T. The -Δ value is 28.4 J kg K at 2 K and 3 T, which is much larger than that of commercial GdGaO (GGG), indicating its potential as a low-temperature magnetic refrigerant.
基于磁热效应（MCE）的低温磁制冷剂作为昂贵且稀缺的He-3的替代品具有巨大潜力。基于Gd（III）的配合物被认为是低温磁制冷剂的优秀候选物。我们通过从有机配体（乙二胺四乙酸二钠（EDTA-2Na）和硫代二甘醇酸）中原位缓慢释放草酸盐，合成了一系列基于Ln（III）的金属有机框架（MOF）（Ln = Gd/Dy）。结构分析表明，该框架是一种中性三维框架，以[Ln(HO)]为节点、CO为连接体连接一维通道。磁性测量表明，在2 K和7 T时，该框架表现出非常弱的反铁磁相互作用，最大-Δ值为36.6 J kg K（-Δ = �4.47 mJ cm K）。在2 K和3 T时，-Δ值为28.4 J kg K，远大于商业GdGaO（GGG），表明其作为低温磁制冷剂的潜力。
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