Abstract
Two new Cu(II) coordination polymers, {[Cu(4-NPA)(btmb)]·1.5H2O}n (1) and {[Cu(4-NPA)(tpp)]·1.5H2O}n (2) (H24-NPA is 4-mitrophthalic acid, btmb is 1,4-bis(1,2,4-triazol-1-ylmethyl)benzene, tpp is 2,4,6-tris(4-pyridyl)pyridine) have been synthesized by the hydrothermal reaction and characterized by single crystal X-ray diffraction, elemental analysis, and IR spectroscopy. The complex 1 is characterized by a 2D wave layer structure containing 1D Cu-carboxylate chains. In this case, the predominantly square-planar geometry [CuO2N2] of the central copper atom is formed by pairs of coordinated 4-NPA anions and btmb molecules. In 2, The Cu(II) ion forms a distorted [CuO3N2] trigonal bipyramid by three carboxylate oxygen atoms and two nitrogen atoms. Two Cu(II) neighbors are linked by two µ2-carboxylates adopting bridging coordination mode to form one dinuclear unit. The dinuclear units are cohered by mated 4-NPA dianions to produce one 1D Cu-carboxylate chain, and further extend by tpp molecules to produce a two-dimensional layer. In addition, powder X-ray diffraction and thermogravimetric analysis of the obtained complexes were studied, as well as the magnetic properties of complex 2.
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This work was supported by the National Natural Science Foundation of China (no. 21571093).
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Yin, WD., Li, GL., Liu, MN. et al. Syntheses, Structures, and Magnetic Properties of Two Cu(II) Coordination Polymers Based on 4-Nitrophthalic Acid. Russ. J. Inorg. Chem. 66, 2077–2083 (2021). https://doi.org/10.1134/S0036023621140151
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DOI: https://doi.org/10.1134/S0036023621140151