Study on the Structure and Catalytic Property of a Novel Benzenesulfonate-Imidazole Complex.

A novel benzenesulfonate-imidazole complex of nickel Ni(Im)6 (C6H5SO3 ) 3 was synthesized by solvothermal method with nickel sulfate, sodium benzenesulfonate and imidazole as main raw materials. The structure, composition and thermal stability of complex were characterized by single X-ray crystal diffraction, inductively coupled plasma optical emission spectrometer, infrared spectroscopy, powder X-ray diffraction and thermogravimetric analysis. The molecular structure was determined. The specific surface area and the pore structure were determined by N2 adsorption-desorption test. The result shows that the complex belongs to monoclinic system, P21/c space group, exhibiting a 3D spatial structure. It exhibits high phase purity and thermal stability. The cell parameters of complex are a = 8.377 3(4) Å, b = 10.151 8(5) Å, c =20.526 3(10) Å, α =90°, β =90. 292 0(10)°, γ = 90°, V = 1 745. 63(15) Å3, Z = 2, Mr = 781.52, F(000) = 812, μ = 0.737 mm-1, Dc =1.487 g·cm-3, R1 =0.042 1,w R2=0.1103. Then, the Knoevenagel reaction was used as a probe to test the catalytic performance of complex. The experimental results show that under room temperature and solvent-free conditions, the complex could complete catalytic reactions in a relatively short time and exhibit high catalytic activity. [ABSTRACT FROM AUTHOR]