期刊
INORGANIC CHEMISTRY
卷 55, 期 5, 页码 2037-2047出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.5b02367
关键词
-
资金
- National Natural Science Foundation of China [21171068]
- Shandong Provincial Natural Science Foundation of China [ZR2010BM036]
Novel high-nuclearity lanthanide clusters (Ln(17)) are generated in situ in the coordination-driven self-assembly. A metal-cluster-directed symmetry strategy for building metal coordination cages is successfully applied to a lanthanide system for the first time. A new family of octagonal-prismatic lanthanide coordination cages UJN-Ln, formulated as [Ln(mu(3)-OH)(8)] [Ln(16)(mu(4)-O) (mu(4)-OH) (mu(3)-OH)(8)(H2O)(8)(mu(4)-dcd)(8)] [ (mu(3)-dcd)(8)]center dot 22H(2)O (Ln = Gd, Tb, Dy, Ho, and Er; dcd = 3,3-dimethylcyclopropane-1,2-dicarboxylate dianion), have been assembled from the unique Ln(17) clusters and simple cliplike ligand H(2)dcd. Apart from featuring aesthetically charming structures, all of the compounds present predominantly antiferromagnetic coupling between the corresponding lanthanide ions. Additionally, the intense-green photoluminescence for UJN-Tb and magnetic relaxation behavior for UJN-Dy have been observed. Remarkably, UJN-Gd shows a large magneto caloric effect (MCE) with an impressive entropy change value of 42.3 J kg(-1) K-1 for Delta H = 7.0 T at 2.0 K due to the high-nuclearity cluster and the lightweight ligand. The studies highlight the structural diversity of multigonal-prismatic metal coordination cages and provide a new direction in the design of cagelike multifunctional materials by the introduction of lanthanide clusters and other suitable cliplike ligands.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据