Synthesis, Crystal Structure and Photoluminescence of a Zn(Ⅱ) Coordination Polymer Derived from 1,1&

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A new polymeric znic(II) coordination polymer, [Zn2(bptc)·(H2O)4]n·nC H3 OH 1, was synthesized by the hydrothermal reaction of Zn(NO3)2·6H2O with 1,1’-biphenyl-2,2’,6,6’-tetracarboxylic acid(H4bptc) and structurally characterized by single-crystal diffraction, IR and elemental analysis. The polymer crystallizes in the orthorhombic system, space group Pnna with a = 13.411(1), b = 16.418(2), c = 9.178(7), V = 2025.2(3) 3, Z = 4, C17H14O13Zn2, Mr = 557.06, Dc = 1.827 g/cm3, F(000) = 1120, μ(MoK α) = 2.439 mm-1. The final R and wR are 0.0548 and 0.1691 for 1279 observed reflections with I > 2(I). In this compound, the bptc4- anion adopts monodentate bridging coordination modes connecting the zinc(II) ions to form a 1D chain structure, which furnishes a 2D supramolecular architecture through hydrogen bonding interactions formed by carboxylic oxygen atoms of bpdc, oxygen atoms of crystalline methanol and water molecules. Complex 1 displays an emissive maximum at 435 nm in the solid state at room temperature. A new polymeric znic (II) coordination polymer, [Zn2 (bptc) · (H2O) 4] n · nC H3 OH 1, was synthesized by the hydrothermal reaction of Zn (NO3) 2 · 6H2O with 1,1’-biphenyl- 2,2 ’, 6,6’-tetracarboxylic acid (H4bptc) and structurally characterized by single-crystal diffraction, IR and elemental analysis. The polymer crystallizes in the orthorhombic system, space group Pnna with a = 13.411 (1), b = 16.418 (2), c = 9.178 (7) , V = 2025.2 (3)  3, Z = 4, C17H14O13Zn2, Mr = 557.06, Dc = 1.827 g / cm3, ) = 2.439 mm-1. The final R and wR are 0.0548 and 0.1691 for 1279 observed reflections with I> 2 (I). In this compound, the bptc4- anion requires monodentate bridging coordination modes connecting the zinc (II) ions to form a 1D chain structure, which furnishes a 2D supramolecular architecture through hydrogen bonding interactions formed by carboxylic oxygen atoms of bpdc, oxygen atoms of crystalline methanol and water molecules. Complex 1 displays an emissive maximum at 435 nm in the s olid state at room temperature.
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