Simultaneous assembly of mononuclear and dinuclear dysprosium(III) complexes behaving as single-molecule magnets in a one-pot hydrothermal synthesis

被引：17

作者：

Liu, Cai-Ming ^{[1
]}

Zhang, De-Qing ^{[1
]}

Hao, Xiang ^{[1
]}

Zhu, Dao-Ben ^{[1
]}

机构：

[1] Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, Ctr Mol Sci,Key Lab Organ Solids, Beijing 100190, Peoples R China

来源：

SCIENCE CHINA-CHEMISTRY | 2017年 / 60卷 / 03期

基金：

中国国家自然科学基金;

关键词：

single-molecule magnet; single-ion magnet; dysprosium (III) complexes; slow magnetic relaxation; water aggregations; METAL-ORGANIC FRAMEWORK; SCHIFF-BASE LIGANDS; ION MAGNETS; RELAXATION; MAGNETIZATION; ANISOTROPY; CLUSTER; ACID; DYNAMICS; SOLVENT;

D O I：

10.1007/s11426-016-0359-x

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Two dysprosium(III) complexes derived from 2,2'-bipyridine-6,6'-dicarboxylic acid (H(2)bpdc), [Dy(bpdc)(Hbpdc)]center dot 3H(2)O (1) and [Dy-2(bpdc)(3)(H2O)(3)]center dot 2.125H(2)O (2), were isolated from the same hydrothermal reaction container as different phases. Compound 1 is a mononuclear complex with a DyN4O4 coordination polyhedron; whereas compound 2 is a dinuclear complex with two types of eight coordinated dysprosium(III) ions, showing DyN4O4 and DyN2O6 coordination polyhedra, respectively. Remarkably, a new type of (H2O)(6) supramolecular aggregate exists in the crystal structure of 2. Magnetic investigations revealed that 1 is a field-induced single-ion magnet with an effective energy barrier of 45.6 K, exhibiting two-step magnetic relaxation; while an intramolecular ferromagnetic interaction exists in 2, which is a field-induced single-molecule magnet, displaying two-step magnetic relaxation too, with effective energy barriers of 53.4 and 92.1 K, respectively.

引用

页码：358 / 365

页数：8

共 51 条

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