Four 3d-4f heterometallic Ln45M7 clusters protected by mixed ligands
Four 3d-4f heterometallic Ln45M7 clusters protected by mixed ligands
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受混合配体保护的四个 3d-4f 异金属 Ln45M7 簇
DOI：
10.1039/c8ce00173a
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发表时间：
2018-04-21
期刊：
影响因子：
3.1
通讯作者：
Zheng, Lan-Sun
中科院分区：
文献类型：
--
作者：
Fan, Shen;Xu, Su-Hui;Zheng, Lan-Sun
四个高核镧系过渡金属簇，公式为[Ln(45)M(7)(OH)(68)(CO3)(12)(CH3COO)(26)-(CH3CH2COO)(6)(H2O)(70)]中心点(ClO4)(25)中心点(H2O)(x)（缩写为Ln(45)M(7)： 1，Gd45Co7；2，Gd45Ni7；3，Dy45Co7；4，Dy45Ni7；x近似于50)，由乙酸盐和丙酸盐的混合保护配体获得。结构分析表明，簇状阳离子核心含有52个金属离子，具有碗状结构。 12 CO32- 和 3 ClO4- 阴离子起到混合阴离子模板的作用。磁性研究表明，两个各向同性的含 Gd 团簇 Gd45Co7 和 Gd45Ni7 表现出较大的磁热效应（MCE），而各向异性的含 Dy 团簇 Dy45Co7 和 Dy45Ni7 则表现出缓慢的磁化弛豫。
Four high-nuclearity lanthanide-transition metal clusters, formulated as [Ln(45)M(7)(OH)(68)(CO3)(12)(CH3COO)(26)-(CH3CH2COO)(6)(H2O)(70)]center dot(ClO4)(25)center dot(H2O)(x) (abbreviated as Ln(45)M(7): 1, Gd45Co7; 2, Gd45Ni7; 3, Dy45Co7; 4, Dy45Ni7; x approximate to 50), were obtained with the mixed protecting ligands acetate and propionate. Structural analysis shows that the cluster cationic core contains 52 metal ions featuring a bowl-like structure. 12 CO32- and 3 ClO4- anions play the role of mixed anion templates. Magnetic studies reveal that the two isotropic Gd-containing clusters Gd45Co7 and Gd45Ni7 exhibit a large magnetocaloric effect (MCE), while the anisotropic Dy-containing clusters Dy45Co7 and Dy45Ni7 show slow relaxation of magnetization.