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在20.0±0.1℃,0.1M KCl介质及乙酸或丁二酸缓冲条件下,研究了水溶性的四(邻N—甲基烟酰胺基)苯卟啉(H_2-TM(O-Nic)PP)与Cu(Ⅱ)的反应动力学。实验结果表明,Cu(Ⅱ)嵌入H_2-TM(O-Nic)PP的反应速率对卟啉是一级反应。表观一级速率常数表达式如下:对Cu(Ⅱ)-酸盐体系,其中,对Cu(Ⅱ)-丁二酸盐体系,其中,提出了Cu(Ⅱ)嵌入H_2-TM(O-Nic)PP的反应机理,并对乙酸缓冲体系和丁二酸缓冲体系中反应动力学的差别作出了讨论。
The water-soluble tetrakis (o-N-methylnicotinamido) phenylporphyrin (H-TM (O-Nic) PP) was studied under the conditions of 20.0 ± 0.1 ℃, 0.1 M KCl medium and acetic acid or succinic acid buffer. Reaction kinetics with Cu (Ⅱ). The experimental results show that the reaction rate of Cu (Ⅱ) intercalated into H_2-TM (O-Nic) PP is a first order reaction to porphyrin. The expression of the apparent first-order rate constant is as follows: For Cu (Ⅱ) -acid system, Cu (Ⅱ) -succinate system is proposed, in which Cu (Ⅱ) ) PP reaction mechanism, and the difference between the reaction kinetics of acetic acid buffer system and succinic acid buffer system are discussed.