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2,2’-联吡啶(2,2’-Dipyridyl,Dpy)是一种常用的二齿含氮配位体,它与铜等金属离子可以生成稳定的络合物.Cu-Dpy-AA的三元混配络合物也广为研究(AA为氨基酸).然而仔细审察以往的工作,可以发现在联吡啶-铜络合体系中,有些基本的络合行为并未透彻研究.例如,理论上讲联吡啶可以结合两个质子,但文献上却只见一级质子结合常数的报导.由于联吡啶与二价铜络合物的稳定性,Irving等用分配法测定了它的稳定常数.Anderegg认为用pH电位法研究此体系是较困难的,因此改用置换法及汞电极电位法.1977年,Pettit用pH电位法得到了两组Dpy-Cu(II)络合物的稳定常数,但结果
2,2’-Dipyridyl (Dpy) is a commonly used bidentate nitrogen-containing ligand that can form stable complexes with metal ions such as copper.Cu-Dpy-AA Ternary mixed complexes are also widely studied (AA for the amino acids.) However, careful examination of previous work, we can find in the bipyridine-copper complex system, some of the basic complex behavior has not been thoroughly studied.For example, theory Although bipyridyl can bind two protons, there is only one first-order proton binding constant reported in the literature Irving et al. Have determined their stability constants by the partition method due to the stability of bipyridine and bivalent copper complexes. Anderegg thought that it was more difficult to study this system by pH potential method, so the substitution method and mercury electrode potential method were used.In 1977, Pettit obtained the stability constants of two groups of Dpy-Cu (II) complexes by pH potential method, But the result