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      https://www.ias.ac.in/article/fulltext/jcsc/130/01/0005

    • Keywords

       

      Cadmium(II) compounds; polycarboxylates; crystal structures; fluorescent properties; fluorescence sensing

    • Abstract

       

      Three newcadmium(II) coordination compounds [Cd2(L)2(btec)(H2O)2]·3H2O(1), [Cd(HL)(btb)] (2) and [Cd(L)(pda)] · 2H2O (3) were prepared by hydrothermal reactions of cadmium(II) chloride with ligands L (L = N,N'-bis(3-pyridyl)octandiamide) in the presence of different aromatic polycarboxylates(H2btec = 1,2,4,5-benzenetetracarboxylic acid, H2btb = 1,3,5-tri(4-carboxylphenyl)benzene, H2pda = 1,4-phenylenediacetic acid). The structures of compounds 1–3 have been determined by X-ray single crystal diffraction analyses and further characterized by infrared spectroscopy (IR), powder X-ray diffraction (PXRD) and thermogravimetric (TG) analyses. Compound 1 displays a 3D metal-organic framework with (4,4,4)-connected {62.84}{63.83}{64.82} topology constructed from 2D [Cd2(btec)]n layers and μ2-bridging L ligands.Compound 2 is a 3D (3,3)-connected {103} topological network based on the 3D [Cd(btb)]n−n framework and the protonated monodentate HL ligand. Compound 3 shows a 2D layer with (3,5)-connected (42 · 67 · 8)(42 · 6) topological structure, which are further linked by hydrogen bonding interactions to form a 3D supramolecular network. The influences of three aromatic polycarboxylates on the structures of title compounds are investigated. Further, the fluorescent properties of three cadmium(II) compounds and their fluorescent sensing properties towards small solvent molecules and metal cations have been studied.

    • Author Affiliations

       

      HONGYAN LIN1 JIAFENG LIN JING ZHAO YUAN TIAN XIANG WANG GUOCHENG LIU1

      1. Department of Chemistry, Bohai University, Jinzhou 121000, People’s Republic of China
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