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在二甲基甲酰胺和水混合溶剂中及在大阳离子M(Ⅱ)(M(Ⅱ)=Cd(Ⅱ)、Hg(Ⅱ))的催化下,用分光光度法研究了四苯基卟啉锌Zn(Ⅱ)TPP的生成反应动力学,提出了反应机理:M(Ⅱ)+H2TPPK2M(Ⅱ)*H2TPPM(Ⅱ)*H2TPP+Zn(Ⅱ)k3→Zn(Ⅱ)TPP+M(Ⅱ)+2H+Zn(Ⅱ)+H2TPPK1Zn(Ⅱ)*H2TPPZn(Ⅱ)*H2TPPk1→Zn(Ⅱ)TPP+2H+Zn(Ⅱ)*H2TPP+Zn(Ⅱ)k2→Zn(Ⅱ)TPP+Zn(Ⅱ)+2H+研究了温度对反应动力学参数的影响,求得各平衡步的ΔrH0m,ΔrS0m及其他基元反应的活化参数Δ≠Hm,Δ≠Sm。
Under the catalysis of the large cation M (II) (M (II) = Cd (II), Hg (II)) in dimethylformamide and water mixed solvents, the photolysis of tetraphenylporphyrin The reaction kinetics of Zn (Ⅱ) TPP was proposed and the reaction mechanism was proposed. The reaction mechanism was as follows: H2 (superscript 2 +) H2TPPK2M (Ⅱ) * H2TPP + Zn (Ⅱ) k3 → Zn (Ⅱ) TPP + (Ⅱ) * H2TPPZn (Ⅱ) * H2TPPk1 → Zn (Ⅱ) TPP + 2H + Zn (Ⅱ) * H2TPP + Zn (Ⅱ) k2 → Zn (Ⅱ) TPP + Zn (Ⅱ) + 2H + The influence of temperature on the kinetic parameters was studied. ΔrH0m, ΔrS0m and activation parameters of other elementary reactions Δ ≠ Hm, Δ ≠ Sm.