Three d10 coordination polymers assembled from 3,5-bis(imidazole-1-yl)pyridine and different polycarboxylates: Syntheses,structures and luminescence properties |
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| Institution: | 1. Graduate School of Science and Engineering, Saitama University, 255 Shimo-Ohkubo, Sakura-ku, Saitama 338-8570, Japan;2. Mitsubishi Chemical Group, Science and Technical Research Center Inc., 1000 Kamoshida-cho, Aoba-ku, Yokohama 227-8502, Japan;1. Key Laboratory of Pesticide & Chemical Biology, Ministry of Education and School of Chemistry, Central China Normal University, Wuhan 430079, PR China;2. College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471022, PR China;3. Institute of Resources & Environment, Henan Polytechnic University, Jiaozuo 454150, PR China |
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| Abstract: | Three novel Zn(II)/Cd(II) coordination polymers, Cd2(bip)2(m-bdc)2(H2O)2·3H2O]n (1), Zn2(bip)2(p-bdc)2·2.5H2O]n (2) and Zn(bip) (p-bdc)·3H2O]n (3), where bip = 3,5-bis(imidazole-1-yl)pyridine, m-H2bdc = 1,3-benzenedicarboxylic acid, p-H2bdc = 1,4-benzenedicarboxylic acid, have been successfully synthesized under solvothermal conditions. The linkage of different ligands with Cd(II) ions in compound 1 affords a (3,5)-connected layer. Furthermore, 2D→3D parallel polycatenation occurs wherein the layers are polycatenated with the adjacent two parallel layers to form a 3D framework. In 2 and 3, the polycarboxylates act as pillars to combine the metal-bip chains, yielding the layered structures. These 2D networks are extended to the final 3D supramolecular architectures by π-π stacking interactions. The results show that bip can act as a versatile building block for the construction of various coordination polymers. Moreover, the fluorescent properties of 1–3 in the solid state at room temperature have been investigated. |
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| Keywords: | Coordination polymers Crystal structures Photoluminescence |
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