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
收藏
页码：4029 / 4035
页数：7
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