Three Cadmium(II) Coordination Polymers based on Mixed 1,2‐Naphthalenedicarboxylate and Bis(pyridyl) Co‐ligands: Structural Diversities and Photoluminescent Properties |
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| Authors: | Min Chen Hui Zhao Zhuo‐Wei Wang Chun‐Sen Liu |
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| Institution: | Henan Provincial Key Laboratory of Surface & Interface Science, Zhengzhou University of Light Industry, 450002 Zhengzhou, P. R. China |
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| Abstract: | Hydrothermal reactions of Cd(OAc)2 · 2H2O with 1,2‐naphthalic anhydride in the absence/presence of different rigid/flexible bis(pyridyl) co‐ligands, produce three distinct coordination polymers, namely Cd(ndc)]n ( 1 ), {Cd5(ndc)4(bpp)2(OH)2](H2O)4}n ( 2 ), and Cd5(ndc)4(bpy)2(OH)2]n ( 3 ) ndc = 1,2‐naphthalenedicarboxylate, bpp = 1,3‐bis(4‐pyridyl)propane, and bpy = 4,4′‐bipyridine]. Complex 1 contains dinuclear Cd2O2] clusters as secondary building units (SBUs) and shows a two‐dimensional (2D) kgd network. Complexes 2 and 3 possess one‐dimensional (1D) chains based on pentanuclear Cd5(μ3‐OH)2(COO)2] units as SBUs, which are further extended to afford 2D sql sheet via flexible bpp in 2 and three‐dimensional (3D) pcu network via rigid bpy in 3 , respectively. The structural diversities indicate that the bis(pyridyl) co‐ligands with different flexibility play a key role on the formation of the final supramolecular structures. The complexes were characterized by X‐ray crystallographic, IR, elemental, thermal stability, and powder X‐ray diffraction analyses. In addition, the photoluminescent properties in solid state were also investigated. |
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| Keywords: | Coordination polymers Cadmium 1 2‐Naphthalenedicarboxylate ligand Different SBUs Photoluminescence |
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