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硝酸盐桥联八核[Na2Ln6]（Ln = Dy，Tb，Gd，Sm）配合物的合成、结构和磁性。

Synthesis, structures and magnetic properties of a family of nitrate-bridged octanuclear [Na2Ln6] (Ln = Dy, Tb, Gd, Sm) complexes.

机构信息

Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215006, China.

出版信息

Dalton Trans. 2013 Aug 7;42(29):10433-8. doi: 10.1039/c3dt50417d. Epub 2013 May 29.

DOI:10.1039/c3dt50417d
PMID:23715465
Abstract

A new family of octanuclear lanthanide compounds [Na2Ln6L8(C6H4NH2COO)2(C2H5OH)2(H2O)4(NO3)]·NO3·C2H5OH·nH2O [H2L = 2-{[(2-hydroxy-3-methoxyphenyl)methylidene]amino}benzoic acid; Ln = Dy (1) (n = 15); Tb (2), Gd (3) (n = 14); Sm (4) (n = 16)] have been prepared under hydrothermal conditions. The X-ray crystal structure analysis reveals that complexes 1-4 are isomorphous. The core of the structure is a [4 + 2] combination of an Ln4 cubane and an Ln2 unit. The two units are bridged by a nitrate ion, which is located in the center of the cluster and displays an unusual μ8-η(2):η(2):η(4) tridentate bridging mode. The magnetic studies for complex 1 show that the [Na2Dy6] unit exhibits slow magnetic relaxation behavior.

摘要

一种新型的八核镧系化合物[Na2Ln6L8(C6H4NH2COO)2(C2H5OH)2(H2O)4(NO3)]·NO3·C2H5OH·nH2O [H2L = 2-{(（2-羟基-3-甲氧基苯基）亚甲基）氨基}苯甲酸；Ln = Dy（1）（n = 15）；Tb（2），Gd（3）（n = 14）；Sm（4）（n = 16）]在水热条件下制备。X 射线晶体结构分析表明，配合物 1-4 是同晶的。结构的核心是一个[4 + 2]组合的 Ln4 立方烷和一个 Ln2 单元。两个单元通过一个位于簇中心的硝酸盐离子桥接，其呈现出不寻常的μ8-η(2):η(2):η(4)三齿桥接模式。对配合物 1 的磁性研究表明，[Na2Dy6]单元表现出缓慢的磁弛豫行为。

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