The Study Of Cu²⁺ Complexes With Antipyrinc Derivatives

With the development of the society, the dye was used more widely. If the dyewastewater was discharged directly without treated, which would bring serious harmto the ecological environment. So effective methods and techniques for dyedegradation is intrested. The enzymatic treatment for the synthetic dye decolorizationis a promissing method due to its enviormental friendly. But there are threedisadvantages for enzym to degradate the synthetic dye, poor stability, poorenvironmental adaptability and long production cycle. So it is very important toimprove the properties of enzym. In this paper, the Cu2+complexes with theantipyrine were synthesized and the properties used as model compounds of oxidasewere studied. The results and conclusion were listed as following.1. Five4-aminoantipyrine schiffbase HLb, HLc, HLd, HLeand Lfweresynthesized and characterized from4-aminoantipyrine and corresponding aromaticaldehydes. The reactiuon of the schiffbaes with CuCl2were studied. And fivemononuclear Cu2+complexes, CuLb.OH, CuLc.Cl, CuLd.OH, CuLe.OH andCuLf.Cl.OH were obtained and characterized by IR spectra， UV-Vis spectra andelemental analysis.2. The schiffbase, Lawas synthesized and charaterized from4-aminoantipyrineand terephthalic aldehyde. The coordination reaction of Lawith CuCl2was studied.The mononuclear Cu2+complex, CuLg.Cl2.3H2O was obtained with nLa:nCuCl2=1:3.And the mononuclear Cu2+complex,CuLg2.Cl2.3H2O was obtained with nLa:nCuCl2=1:2.Decomposition of Lawas found and the machanism were deduced. In order to studythe properties of Cu2+complex with antipyrine, the Cu2+complex with diantipyrylmethane, CuLh.Cl2was syudied and characterized.3. The catalytic degradation of acid blue9was investigated by UV-Vis spectra,using the five synthetic schiff base copper complexes and three antipyrine coppercomplexes as oxidase model compound. It is found that eight complexes all havecatalytic effect. The catalytic activity of the complexes, CuLb.OH, CuLc.Cl, CuLd.OH are the best. And found that the catalytic properties of CuLg.Cl2.3H2O, CuLg2.Cl2.3H2OCuLb.OH, CuLc.Cl,CuLd.OH,CuLe.OH were similar with the enzymatic properties,andthe catalytic properties of CuLf.Cl.OH, CuLh.Cl2were not similar with the enzymaticproperties. Then the Km of CuLb.OH、CuLc.Cl�'�CuLd.OH was deterrmined withKm=1.10×10-1mmol/L、1.09×10-1mmol/L、1.05×10-1mmol/L, correspondly.It is showed that the CuLb.OH、CuLc.Cl�'�CuLd.OH could be used as oxidase modelcompounds to catal yze the acid blue9degradation. The all will provide thetheoretical and practical basis for the effective and safe dye pollutant treatment.4. The products of the acid blue9degradation was analysised by HPLC method.It is found the degradation product was maleic acid. The degradation mechanism ofthe acid blue9was deduced. And the catalytic cycle for enzyme model compoundswas deduced. The all will provide the theoretical and practical basis for the moreeffective model compounds.