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本文报导了本实验条体下,利用pH电位法对组氨酸(His)与铜、锌二元配合物体系及黄芩甙(H_3B)、组氨酸与铜、锌三元配合物体系的研究结果。利用计算机SCOGS_2程序处理实验数据,建立了各体系的最佳化学模型,确定了各体系在实验条件下的有关常数,并给出了各体系的配位物种分布图。结果表明在组氨酸与铜、锌二元配合物体系中主要配位物种有:His-Cu;Gu(His)~+,Cu(His)_2,Cu(His)_2 H,Cu(His)(OH);His—Zn:Zn(His)~+,Zn(His)_2,Zn(His)_2H~+。在黄芩甙、组氨酸与铜、锌的混配配合物种主要是:M(His)(B)~(2-),M(His)(B)H~-,且有较强的稳定性。
In this paper, we report the study of the ternary complex of histidine (His), copper and zinc complexes and baicalin (H_3B), histidine and copper and zinc using pH potentiometry result. Using the computer SCOGS_2 program to process the experimental data, the best chemical model of each system was established, the constants of each system under the experimental conditions were determined, and the coordination map of each system was given. The results showed that the major coordination species of His-Cu, His (His) _2, Cu (His) _2H, Cu (His) (OH); His-Zn: Zn (His) ~ +, Zn (His) _2, Zn (His) _2H ~ +. The main compounds of baicalin, histidine and copper and zinc were M (His) (B) ~ (2), M (His) (B) H ~ .