Synthesis, Structures, and Magnetic Properties of Three 3D Coordination Polymers Based on M4O4 Cubanes (M = MnII, FeII, CoII)

被引：23

作者：

Tian, Chong-Bin ^{[1
,2
]}

Zhang, Hua-Bin ^{[1
,2
]}

Peng, Yan ^{[1
]}

Xie, Yun-En ^{[1
,2
]}

Lin, Ping ^{[1
]}

Li, Zhi-Hua ^{[1
]}

Du, Shao-Wu ^{[1
]}

机构：

[1] Chinese Acad Sci, State Key Lab Struct Chem, Fujian Inst Res Struct Matter, Fuzhou 350002, Fujian, Peoples R China

[2] Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China

来源：

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2012年 / 25期

基金：

中国国家自然科学基金;

关键词：

Polymers; Cubanes; Structure elucidation; Magnetic properties; Spin frustration; SINGLE-MOLECULE MAGNETS; MANGANESE ALKOXIDE CUBES; DI-2-PYRIDYL KETONE; WEAK FERROMAGNETISM; CRYSTAL-STRUCTURE; MN-4(II) CUBANE; POROUS MAGNET; COMPLEXES; CARBOXYLATE; COBALT(II);

D O I：

10.1002/ejic.201200353

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Three new isostructural coordination polymers, namely, [M4(mu 3-OMe)4(nic)4]n [M = MnII (1), FeII (2), and CoII (3); Hnic = nicotinic acid], have been solvothermally synthesized and magnetically characterized. Single-crystal X-ray diffraction study reveals that compounds 13 are three-dimensional frameworks, which are constructed through {M4(mu 3-OMe)4} cubane-like building blocks and bridging nic anions. Variable-temperature magnetic susceptibility measurements indicate that they all show antiferromagnetic behavior with different intracubane coupling constants. Complex 1 exhibits spin-frustration behavior, and was fitted with a two-J model in the temperature range of 2300 K, which gives J1 = 0.92 and J2 = 2.23 cm1. Complexes 2 and 3 were fitted with the same model in the temperature range of 30300 K and 40300 K to give the exchange coupling constants J1 = 2.49, J2 = 4.84 cm1 and J1 = 4.18, J2 = 5.44 cm1, respectively.

引用

页码：4029 / 4035

页数：7

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