Syntheses,topological analyses and magnetic properties of two 3D supramolecular nickel-organic frameworks constructed from 1,3,5-benzenetricarboxylate and flexible imidazole-based ligands |
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| Authors: | Jian-Di Lin Cui-Cui Jia Zhi-Hua Li Shao-Wu Du |
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| Affiliation: | 1. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, PR China;2. Graduate University of Chinese Academy of Sciences, Beijing 100039, PR China |
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| Abstract: | Two supramolecular nickel-organic frameworks, Ni(HBTC)(bix)]n (1) and Ni3(BTC)2(mbix)3(H2O)4]n · 6nH2O (2) (bix = 1,4-bis(imidazole-l-yl-methyl)benzene, mbix = 1,3-bis(imidazole-l-yl-methyl)benzene, and H3BTC = 1,3,5-benzenetricarboxylate), have been hydrothermally prepared by the assembly of H3BTC, Ni2+ with bix or mbix. Compound 1 shows a 2D layer structure, whose 3D supramolecular structure exhibits a fsc topology when hydrogen-bonging interactions between the adjacent layers are taken into account. Compound 2 manifests an unprecedented 2D (3, 4)-connected topological net. The 3D supramolecular framework of 2 is formed through π?π stacking interactions between the adjacent layers. The magnetic studies show that 1 features overall ferromagnetic property whilst 2 presents strong zero-field splitting (ZFS) when treated as a mononuclear model. Furthermore, the IR and TGA properties of 1 and 2 were also studied. |
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