Chelating properties of EDTA-type ligands containing six-membered backbone ring toward copper ion: Structure, EPR and TD-DFT evaluation
作者:Marina Ćendić、Robert J. Deeth、Auke Meetsma、Eugenio Garribba、Daniele Sanna、Zoran D. Matović
DOI:10.1016/j.poly.2016.12.025
日期:2017.3
Abstract The P-APC ligands (EDTA-like aminopolycarboxylate ligands comprising 1,3-propanediamine backbone) H4pdta, H4pd3ap, H4pddadp and H4pdtp (H4pdta = 1,3-propanediamine-N,N,N′,N′-tetraacetatic acid; H4pd3ap = 1,3-propanediamine-N,N,N′-triacetic-N′-3-propionic acid; H4pddadp = 1,3-propanediamine-N,N′-diacetatic-N,N′-di-3-propionic acid; H4pdtp = 1,3-propanediaminetetra-3-propionic acid) were investigated
摘要P-APC配体(包含1,3-丙二胺主链的EDTA样氨基多羧酸盐配体)H4pdta,H4pd3ap,H4pddadp和H4pdtp(H4pdta = 1,3-丙二胺-N,N,N',N'-N'-四乙酸; H4pd3ap = 1,3-丙二胺-N,N,N'-三乙酸-N'-3-丙酸; H4pddadp = 1,3-丙二胺-N,N'-二乙酸-N,N'-二-3-丙酸;研究了H4pdtp = 1,3-丙二胺四-3-丙酸)。螯合配体通过五个或六个供体原子与铜(II)配位,提供扭曲的三角双锥体和八面体结构,并通过X射线分析对Ba [Cu(pd3ap)]·6H2O(1)和trans(O6)-进行了验证。 Ba [Cu(pddadp)]·8H2O(2)配合物。详细显示了抗衡离子对P-APC配合物的影响以及对其他应变参数的分析。EPR光谱结果证实了水溶液中1的五配位和2的六配位,即使存在几种质子化程度不同的Cu