基于多齿希夫碱配体的两种新型Gd2和Gd4化合物：不同的晶体结构和磁制冷性能

IF 3.3 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences Pub Date : 2025-07-29 DOI:10.1016/j.solidstatesciences.2025.108037

Wen-Min Wang , Jiang-Nan Yu , Shun-Mei Yuan , Xin-Xin Wang , Yin-Ling Hou

引用次数: 0

摘要

在溶剂热条件下成功合成了两个新的Gd（III）基化合物[Gd2(L1)2(Ac)2(ch30)2] (1) (HL1 = （E)- n′-（5-溴-2-羟基-3-甲氧基苄基）picolinohydrazide）和[Gd4(L2)4(μ2-OH)(μ2- ch30)3(ch30)4] (2) (HL2 = （E)- n′-（3,5-二溴-2-羟基苄基）picolinohydrazide）。化合物1为双核结构，具有平行四边形Gd2O2核；化合物2为四核结构，具有菱形Gd4核。磁性研究表明，1- gd2和2-Gd4化合物在相邻的Gd（III）离子之间表现出弱的反铁磁耦合，并且具有较大的磁热效应，1- gd2的磁热效应为25.79 J kg−1 K−1 （ΔH = 70 kOe, 2.5 K）， 2-Gd4的磁热效应为25.50 J kg−1 K−1 （ΔH = 70 kOe, 2.0 K）。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Two new Gd2 and Gd4 compounds based on multidentate Schiff-base ligands: Different crystal structures and magnetic refrigeration properties

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Two new Gd2 and Gd4 compounds based on multidentate Schiff-base ligands: Different crystal structures and magnetic refrigeration properties

Two new Gd(III)-based compounds [Gd₂(L1)₂(Ac)₂(CH₃O)₂] (1) (HL1 = (E)-N'-(5-bromo-2-hydroxy-3-methoxybenzylidene)picolinohydrazide), and [Gd₄(L₂)₄(μ₂-OH)(μ₂-CH₃O)₃(CH₃O)₄] (2) (HL2 = (E)-N'-(3,5-dibromo-2-hydroxybenzylidene)picolinohydrazide) were successfully synthesized under solvothermal conditions. Compound 1 is a binuclear structure and possesses a parallelogram Gd₂O₂ core, while compound 2 is a tetranuclear structure and contains a rhombic Gd₄ core. Magnetic studies suggest that 1-Gd₂ and 2-Gd₄ compounds exhibits weak antiferromagnetic coupling between adjacent Gd(III) ions and have larger magnetocaloric effects of 25.79 J kg⁻¹ K⁻¹ for 1-Gd₂ (ΔH = 70 kOe at 2.5 K) and 25.50 J kg⁻¹ K⁻¹ for 2-Gd₄ (ΔH = 70 kOe at 2.0 K).

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来源期刊

Solid State Sciences 化学-无机化学与核化学

CiteScore

6.60

自引率

2.90%

发文量

214

审稿时长

27 days

期刊介绍： Solid State Sciences is the journal for researchers from the broad solid state chemistry and physics community. It publishes key articles on all aspects of solid state synthesis, structure-property relationships, theory and functionalities, in relation with experiments. Key topics for stand-alone papers and special issues: -Novel ways of synthesis, inorganic functional materials, including porous and glassy materials, hybrid organic-inorganic compounds and nanomaterials -Physical properties, emphasizing but not limited to the electrical, magnetical and optical features -Materials related to information technology and energy and environmental sciences. The journal publishes feature articles from experts in the field upon invitation. Solid State Sciences - your gateway to energy-related materials.