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本文报道应用停流方法对非对称取代卟啉[5-(4-乙酰氨基苯基)-10,15,20-三(4-甲基苯基)卟啉](H2T(p-CH3)3(p-NHCOCH3)PP)与Zn(Ⅱ)、Cd(Ⅱ)在丙酮中的生成反应动力学进行了研究,提出了反应机理,并用非线性拟合和线性拟合的方法求得了生成反应各基元步骤的动力学参数,同时还探讨了温度,溶剂效应、动力学盐效应对反应体系的影响,并对锌、镉两种卟啉在生成机理及生成反应速率上的差异给予了解释。
This paper reports the application of the stop-flow method to the asymmetric substitution of porphyrin [5- (4-acetamidophenyl) -10,15,20-tris (4-methylphenyl) porphyrin] (P-NHCOCH3) PP) and the reaction of Zn (Ⅱ) and Cd (Ⅱ) in acetone were studied. The reaction mechanism was proposed and the reaction products were obtained by nonlinear fitting and linear fitting The kinetic parameters of the elementary steps and the effects of temperature, solvent effect and kinetic salt effect on the reaction system were also discussed. The differences in the formation mechanism and reaction rate of zinc and cadmium porphyrin were also explained.