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含吡嗪-2-羧酸的锌和钴同构配合物的合成、表征与性质研究
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Abstract:
通过自然挥发法合成了2个含吡嗪-2-羧酸的同构含锌配合物1和含钴配合物2。并通过X-射线单晶衍射、红外和元素分析表征了其晶体结构。两个同构的配合物是由一个金属离子和与1个配体和1个配位水分子形成的单核结构，单核结构之间再通过O-H...H氢键作用组装成三维超分子网络结构。并测试了两配合物的紫外可见吸收和荧光及配合物2非均相类Fenton试剂的催化性质。测试结果表明，两个配合物在不同溶剂中紫外可见吸收峰均在270 nm，不同溶剂中荧光发射峰均在559 nm及配合物1的固态荧光发射峰在385 nm。含Co离子的配合物2对甲基橙(MO)溶液可以达到86.53%的降解率，显示了良好的类Fenton催化性质，表明其是一种潜在的催化降解有机污染物材料。
Isostructural complexes (zinc 1 and cobalt 2) of pyrazine-2-carboxylic acid ligand were synthesized by natural volatilization method. The structure of obtained isostructural complexes (zinc and cobalt) was characterized by X-ray crystal diffraction，IR and elemental analysis. The results showed that the two isostructural complexs was a mononuclear unit with metal ions center coordinated with one ligand and one water molecules, 3D supermolecular was formed by O-H...H hydrogen bonds interactions. In addition, the UV-Vis and fluorescence spectroscopy of the complex and catalytic property of the complex 2 for the methyl orange (MO) degradation as Fenton-like reagent were investigated. The test results indicate that Both complexes exhibit UV visible absorption peaks at 270 nm, the fluorescence emission peaks are all at 555 nm in different solvents and the solid-state fluorescence emission peaks are all at 360 nm of complex 1, respectively. The Co(II) mononuclear complex 2 exhibited Fenton-like catalytic property with the degradation rate of MO reaching 86.53%, suggesting a potential material for catalytic degradation of organic pollutants.
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