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本文用停止流动法研究了水溶液中十二烷基硫酸钠(Sodium dodecyl sulfate,缩写SDS)胶束对Ni(Ⅱ)与吡啶偶氮染料(5-Bromopyridylazo diethylaminophenol and 3.5-dibromopyridylazo diethylaminophenol缩写为5-BrPADAP和3,5-2BrPADAP)络合物形成的动力学和胶束催化效应。动力学分析表明,胶束对于金属—配体络合物形成的催化作用主要是由于反应物在胶束表面区域的浓集效应;胶束的微环境既没有改变此络合反应的活化能,也没有改变反应途径。应用假相模型和的胶束催化概念,引入了配体有效反应浓度系数,从理论上定量地解释了SDS腔束对此络合反应的催化作用。
In this paper, we studied the effects of sodium dodecyl sulfate (SDS) micelles on the degradation of Ni (Ⅱ) with 5-Bromopyridylazo diethylaminophenol and 3.5-dibromopyridylazo diethylaminophenol (abbreviated as 5-BrPADAP And 3,5-2 BrpADAP) complex formation kinetics and micellar catalysis. Kinetic analysis shows that the catalytic effect of micelles on the formation of metal-ligand complexes is mainly due to the concentration effect of reactants on the surface of micelles. The microenvironment of micelles neither changes the activation energy of the complex reaction, Did not change the reaction path. Using the pseudo-phase model and the concept of micellar catalysis, the ligand effective reaction concentration coefficient was introduced to theoretically quantitatively explain the catalytic effect of SDS cavity on this complexation reaction.