Syntheses,crystal structures,catalytic and anti-wear properties of nickel(Ⅱ)and zinc(Ⅱ)coordination polymers based on 5-(2-carboxyphenyl)nicotinic acid
Two nickel(Ⅱ)and zinc(Ⅱ)coordination polymers,namely {[Ni(μ3-cpna)(μ-dpea)0.5]·H2O}n(1)and {[Zn(μ3-cpna)(μ-dpey)0.5]·H2O}n(2)have been constructed hydrothermally using 5-(2-carboxyphenyl)nicotinic acid(H2cpna),1,2-di(4-pyridyl)ethane(dpea),1,2-di(4-pyridyl)ethylene(dpey),and nickel and zinc chlorides at 160℃.The prod-ucts were isolated as stable crystalline solids and were characterized by IR spectra,elemental analyses,thermogravi-metric analyses,and single-crystal X-ray diffraction analyses.Single-crystal X-ray diffraction analyses revealed that two compounds crystallize in the monoclinic or orthorhombic systems,space groups,P21/c or Pbca.Both compounds show 3D metal-organic frameworks.Compound 2 exhibited an effective catalytic activity in the Knoevenagel conden-sation reaction at room temperature.Meanwhile,compound 2 showed an effective anti-wear performance in poly-α-olefine synthetic lubricant.CCDC:2285135,1;2285136,2.
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