三核Gd(III)-硅氧烷:合成、结构和磁性能

ChemPhysMater Pub Date : 2022-10-01 DOI:10.1016/j.chphma.2022.04.008

Kai Sheng , Ran Wang , Alexey Bilyachenko , Victor Khrustalev , Marko Jagodič , Zvonko Jagličić , Zhaoyang Li , Likai Wang , Chenho Tung , Di Sun

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引用次数: 8

摘要

多核金属团簇，特别是那些具有美观结构的金属团簇，越来越引起人们的兴趣。本研究利用C4对称大环硅氧烷配体，利用高效的溶剂热方法代替传统的Schlenk技术，实现了一种新型的三核Gd(III)簇(Gd13)，其核心为{Gd13O8}，具有前所未有的体心阿基米德立方体构象。据我们所知，Gd13团簇是迄今为止核密度最高的镧系-硅氧烷团簇。此外，磁性研究揭示了簇中相邻Gd离子之间的弱反铁磁相互作用。此外，Gd13表现出低温磁热效应，在2 K和ΔH = 7.0 T时，其最大- ΔSM值为20 J kg−1 K−1。

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Tridecanuclear Gd(III)-silsesquioxane: Synthesis, structure, and magnetic property

Polynuclear metal clusters, particularly those with aesthetically appealing structures, are of increasing interest. In this study, by employing C₄ symmetrical macrocyclic silsesquioxane ligand, a novel tridecanuclear Gd(III) cluster (Gd13) with a {Gd₁₃O₈} core featuring unprecedent body-centered Archimedean cuboctahedron conformation is realized using an efficient solvothermal method instead of conventional Schlenk techniques. To the best of our knowledge, Gd13 cluster is thus far the highest nuclearity of lanthanide-silsesquioxane. Moreover, a magnetic study reveals a weak antiferromagnetic interaction between adjacent Gd ions in the cluster. In addition, Gd13 exhibits cryogenic magnetocaloric effects with a maximum −ΔS_M value of 20 J kg⁻¹ K⁻¹ at 2 K and ΔH = 7.0 T.

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来源期刊

ChemPhysMater

CiteScore

3.90

自引率

0.00%

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