Three transition metal cluster-based coordination polymers based on 1,4-naphthalenedicarboxylate and pyridine ligands |
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| Affiliation: | 1. College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang, Henan 464000, PR China;2. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, The Chinese Academy of Sciences, Fuzhou, Fujian 350002, PR China;3. University of Chinese Academy of Sciences, Beijing 100049, PR China;1. Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON N9B 3P4, Canada |
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| Abstract: | Three new cluster-based coordination polymers (CPs), namely, [Co2(1,4-NDC)2(py)2(H2O)] (1), [pyH]4[Ni6.5(1,4-NDC)8(OH)(py)4(H2O)3]∙H2O (2) and Zn4(1,4-NDC)3(OH)2(py)2 (3) (1,4-NDCH2 = 1,4-Naphthalenedicarboxylic acid, py = pyridine) have been hydrothermally synthesized and structurally characterized. Compound 1 is constructed from the tetranuclear clusters of [Co4(COOR)8(H2O)2]; while compound 2 contains trinuclear [Ni3(COOR)8(H2O)2]2− or tetranuclear [Ni4(COOR)8(OH)2]2− units owning to the disorder of metal ions. Both compounds feature three-dimensional (3D) structures with the eight-connected bcu networks. Compound 3 is the first 1,4-NDCH2-based 3D CP based on the rarely octanuclear [Zn8(μ3-OH)4(COOR)12] clusters with the six-connected pcu net. The three compounds are all constructed from the NDC2− and py ligands but their structures are quite different, revealing the significance of metal ions in the structural modulation of CPs. In addition, the thermal stabilities of the three compounds were investigated. |
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