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通过2,2′-亚乙基双(4,6-二叔丁基苯酚)(EDBPH2)的钠盐与硼氢化稀土Ln(BH4)3·3THF(Ln=Er,Yb,Sm)盐交换反应,可以得到离子对形式的三种双金属配合物[Ln(EDBP)2-(DME)Na(DME)3][Ln=Er(1),Yb(2),Sm(3)].得到的配合物通过元素分析,FT-IR进行了表征,并对其中的Er配合物进行了X射线单晶衍射表征,确定了其结构.研究结果表明,两分子双酚配体中的四个氧原子及一个乙二醇二甲醚(DME)中的两个氧原子与稀土Er进行了配位,而钠离子作为平衡电荷的形式存在.配合物1～3都能作为单组分引发剂催化ε-己内酯开环聚合.
By salt exchange reaction of the sodium salt of 2,2’-ethylenebis (4,6-ditertiarybutylphenol) (EDBPH2) with the borohydride rare earth Ln (BH4) 3.3THF (Ln = Er, Yb, Sm) , Three bimetallic complexes [Ln (EDBP) 2- (DME) Na (DME) 3] [Ln = Er (1), Yb (2), Sm (3) The complex was characterized by elemental analysis and FT-IR, and its Er complex was characterized by X-ray single crystal diffraction and its structure was confirmed. The results show that the four oxygen atoms And one of the two oxygen atoms in ethylene glycol dimethyl ether (DME) coordinated with rare earth Er, while sodium ions existed as equilibrium charges.The complexes 1 ~ 3 all catalyzed ε Caprolactone ring-opening polymerization.