Two Isostructural Metal–Organic Frameworks Directed by the Different Center Metal Ions, Exhibiting the Ferrimagnetic Behavior and Slow Magnetic Relaxation

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• 作者：Yun-Long Wu ; Fu-Sheng Guo ; Guo-Ping Yang ; Lu Wang ; Jun-Cheng Jin ; Xiang Zhou ; Wen-Yan Zhang ; Yao-Yu Wang
• 刊名：Inorganic Chemistry
• 出版年：2016
• 出版时间：July 5, 2016
• 年：2016
• 卷：55
• 期：13
• 页码：6592-6596
• 全文大小：420K
• 年卷期：0
• ISSN：1520-510X

文摘

Two 3D isostructural metal–organic frameworks with 1D ferrimagnetic chains, formulated as [M₃(L)(μ₃-OH)₂(H₂O)₄] [H₄L = (1,1′:4′,1″-terphenyl)-2′,3,3″,5′-tetracarboxylic acid, where M = Mn for 1 and Co for 2], have been successfully synthesized by employing different center metal ions and a multicarboxylate ligand under identical reaction conditions in this work. The single-crystal X-ray diffraction data of 1 and 2 reveal that the complexes are two 3D isostructural frameworks based on 1D [M₃(OH)₂]_n chains composed of triangular subunits as rod-shaped secondary building units, which are classified as binodal 4,6-connected fry nets with the point symbol (5¹⁰·6³·7⁸)(5⁴·6²). The magnetic properties revealed that complexes 1 and 2 exhibit ferrimagnetic behavior. Also, the alternating-current susceptibility of 2 displays slow magnetic relaxation, showing interesting magnetic behavior of a single-chain magnet with an effective energy barrier of 32 K.