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本文用Shimadzu UV-240紫外可见分光光度计对Cu(Ⅱ)与对位取代四苯基卟啉H_2(p-X)TPP(X=NO_2,(Cl,H,CH_3,OCH_3)在二甲亚砜溶剂中的生成动力学及镉(Ⅱ)离子对该反应的催化作用进行了系统研究,提出了反应机理,并观察了Hg(Ⅱ)、Pb(Ⅱ)等其它金属离子对此反应的影响。发现反应速率常数及平衡常数与Hammett取代常数σ值之间呈现良好的直线自由能关系。
In this paper, the Shimadzu UV-240 UV-visible spectrophotometer was used to detect the Cu (Ⅱ) and p-substituted tetraphenylporphyrin H_2 (pX) TPP The kinetics of this reaction and the catalytic effect of cadmium (Ⅱ) ion on the reaction were systematically studied. The reaction mechanism was proposed and the effects of other metal ions such as Hg (Ⅱ) and Pb (Ⅱ) on the reaction were also observed. The reaction rate constant and the equilibrium constant showed a good linear free energy relationship with Hammett’s substitution constant σ.