Synthesis,crystal structure,and fluorescence properties of a two-dimensional copper(II) complex with Schiff base |
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Authors: | Y. H. Fan Y. F. Wang C. F. Bi Q. Wang X. Zhang X. Y. Liu |
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Affiliation: | (1) Chemistry Department, Zhejiang Sci-Tech University, 310018 Hangzhou, People’s Republic of China; |
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Abstract: | A new Schiff base ligand C19H13NO5(H2L) was synthesized using 2-aminoterephthalic acid and 2-hydroxy-1-naphthaldehyde. A complex of this ligand [Cu(C19H11NO5)(C2H6O)] n was synthesized and characterized by IR, UV, fluorescence spectroscopy and X-ray diffraction single-crystal analysis. The crystal crystallizes in the monoclinic system, space group Pbca with a = 8.7745(18), b = 18.613(4), c = 24.644(5) Å, V = 4024.9(14) Å3, Z = 8, F(000) = 1816, S = 1.009, ρ calcd = 1.462 g cm?3, μ = 1.122 mm?1, the final R = 0.0477 and wR = 0.1594 for 4609 observed reflections (I > 2σ(I)). The Cu(II) is five-coordinated by one N atom and two O atoms from the Schiff base ligand and two carboxylate O atoms from another two ligands to form a distorted square-pyramidal geometry. Each ligand serves as a bridging ligand to link Cu2+ ions, leading to a two-dimensional coordination polymer. The fluorescence properties of the ligand and complex were also studied. The ligand shows strong fluorescence, and the fluorescence intensity is weakened after the Cu(II) complex formed. |
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