Magnesium complexes incorporated by sulfonate phenoxide ligands as efficient catalysts for ring-opening polymerization of ε-caprolactone and trimethylene carbonate
作者:Po-Sheng Chen、Yi-Chang Liu、Chia-Her Lin、Bao-Tsan Ko
DOI:10.1002/pola.24133
日期:2010.8.15
supported by sulfonate phenoxide ligands were synthesized and characterized structurally. The reaction of MgnBu2 with L‐H (2 equiv.) produces the four‐coordinated monomeric complexes (LCF3)2Mg (1) and (LOMe)2Mg (2). Complexes 1 and 2 are efficient catalysts for the ring‐opening polymerization of ε‐caprolactone (ε‐CL) and trimethylene carbonate (TMC) in the presence of 9‐anthracenemethanol; complex 1 catalyzes
两种新型磺化的苯酚配体-3,3'-二-叔丁基-2'-羟基-5,5',6,6'-四甲基联苯-2-基4-X-苯磺酸(XCF 3,大号CF3 -H,和XOCH 3,大号OME -H)-were通过的磺酰化制备的3,3'-二-叔丁基-5,5',6,6'-四甲基-2,2' -在存在过量三乙胺的情况下,将二醇与相应的4-取代的苯磺酰氯(1当量)混合使用。合成了磺酸盐酚盐配体负载的镁(Mg)配合物,并对其结构进行了表征。Mg n Bu 2与L‐H(2当量)的反应产生四配位单体络合物(L CF3)2 Mg(1)和(L OMe)2 Mg(2)。配合物1和2是在9-蒽甲醇存在下,ε-己内酯(ε-CL)和碳酸三亚甲基酯(TMC)开环聚合的有效催化剂。配合物1以受控方式催化ε-CL和TMC的聚合反应,生成具有预期分子量和较窄的多分散指数(PDI)的聚合物。在ε‐CL聚合中,络合物1的活性大于络合物2的活性,这可能是由于Mg