Synthesis, Structure and Characterization of a Cd(Ⅱ) Polymer Based on 6-Hydroxynicotinic Acid

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A new 2D layered Cd(II) coordination polymer, [Cd(HnicO)(phen)(NO3)]n 1 (H2nicO = 6-hydroxynicotinic acid, phen = 1,10-phenanthroline), has been hydrothermally synthesized and characterized by elemental analysis, IR, and single-crystal X-ray diffraction.It crystallizes in the monoclinic system, space group P21/c with a = 11.1107(2), b = 13.7639(2), c = 12.1457(4) -, β = 108.695(1)°, V = 1759.40(7) -3, Z = 4, Mr = 492.72 , F(000) = 976, Dc = 1.860 g/cm3, μ = 1.289 mm-1, the final R = 0.0205 and wR = 0.0550 for 3663 observed reflections (I > 2σ(I)).X-ray single-crystal structural analyses reveal that in complex 1, the H2nicO ligands and Cd(II) nodes define the structure to be (4,4) 2D nets which are further assembled into the final 3D architecture via supramolecular interactions such as hydrogen bonds and aromatic interactions.Moreover, the solid-state luminescent study shows the title polymer possesses intense luminescent property at room temperature.
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