三种具有高磁熵的钆基磁性制冷材料：从双核到六核再到八核

Three Gd-based magnetic refrigerant materials with high magnetic entropy: From di-nuclearity to hexa-nuclearity to octa-nuclearity.

作者信息

Wang Minmin, Sun Chengyuan, Gao Yujia, Xue Hong, Huang Ling, Xie Yutian, Wang Jin, Peng Yuanyuan, Tang Yanfeng

机构信息

School of Chemistry and Chemical Engineering, Nantong University, Nantong, China.

Department of Chemistry, Southern University of Science and Technology, Shenzhen, China.

出版信息

Front Chem. 2022 Sep 29;10:963203. doi: 10.3389/fchem.2022.963203. eCollection 2022.

DOI:10.3389/fchem.2022.963203

PMID:36247677

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9559567/

Abstract

Magnetocaloric effect (MCE) is one of the most promising features of molecular-based magnetic materials. We reported three Gd-based magnetic refrigerant materials, namely, Gd(L)(NO)(HO)‧CHCN‧HO (, HL = ()--[(1)-(2-hydroxy-3-methphenyl)methylidene]pyrazine-2-carbohydrazonic acid), {Gd(L)(CO)(CHOH)(HO)Cl}Cl‧4CHCN (), and Gd(L)(CO)(HO)‧2HO (3). Complex contains two Gd ions linked by two : : : : -L ligands, which are seven-coordinated in a capped trigonal prism, and complex possesses six Gd ions, contributing to a triangular prism configuration. For complex , eight Gd ions form a distorted cube arrangement. Moreover, the large values of magnetic entropy in the three complexes prove to be excellent candidates as cryogenic magnetic coolants.

摘要

磁热效应（MCE）是分子基磁性材料最具前景的特性之一。我们报道了三种基于钆的磁性制冷材料，即Gd(L)(NO)(HO)‧CHCN‧HO （，HL = ()--[(1)-(2-羟基-3-甲基苯基)亚甲基]吡嗪-2-碳酰肼酸），{Gd(L)(CO)(CHOH)(HO)Cl}Cl‧4CHCN （），以及Gd(L)(CO)(HO)‧2HO （3）。配合物包含由两个 : : : : -L配体连接的两个钆离子，它们在一个盖帽三角棱柱中为七配位，配合物拥有六个钆离子，形成一个三角棱柱构型。对于配合物，八个钆离子形成一个扭曲的立方体排列。此外，这三种配合物中较大的磁熵值证明它们是低温磁冷却剂的极佳候选材料。