mononucleating (HL1) and a dinucleating (HL2) “end-off” compartmental ligand have been designed and synthesized by controlled Mannich reaction using p-cresol and bis(2-methoxyethyl)amine, and their formation has been rationalized. Six complexes have been prepared on treating HL1 and HL2 with ZnIIX2 (X = Cl–, Br–, I–) with the aim to investigate their hydrolytic activity on phosphoester bond cleavage. Interestingly
通过
对甲酚和双(2-甲氧基乙基)胺的受控曼尼希反应,设计并合成了单核(HL 1)和双核(HL 2)“末端”隔室
配体,并对其形成进行了合理化。制备了六种配合物,分别用Zn II X 2(X = Cl –,Br –,I –)处理HL 1和HL 2,目的是研究它们对
磷酸酯键裂解的
水解活性。有趣的是,观察到单核
配体产生双核配合物[Zn 2(L 1)2 X2 ](1 – 3),而潜在的双核
配体生成单核络合物,[Zn(HL 2)X 2 ](4 – 6)。四(1 – 4)中,通过单晶X射线衍射(XRD)表征了六个复合物中的Zn:Zn离子分别在双核和单核复合物中显示出三角双锥体和四面体配位球。由于溶解度原因,在过量的底物条件下(底物:复合物= 20:1),用4-
硝基苯基
磷酸酯(4-NPP)在缓冲的二甲基甲酰胺(
DMF)(97.5%
DMF,v / v)中进行了分光光度法的
水解动力学研究。该络合物在25°C下以2-10