Living ring-opening polymerization of ε-caprolactone catalyzed by β-quinolyl-enamino aluminium complexes: ligand electronic effects
作者:Peng Wang、Jianbin Chao、Xia Chen
DOI:10.1039/c7dt04522k
日期:——
were confirmed by single-crystal X-ray diffraction, which revealed that all the Al atoms adopt a distorted tetrahedral geometry. These Al complexes were tested as the initiators for the ring-opening polymerization (ROP) of ε-caprolactone (ε-CL). The polymerization results showed that 1–5 in the presence of BnOH proceeded efficiently and their catalytic behaviors toward the ROP of ε-CL were significantly
一系列β-喹啉基-烯氨基铝配合物[AlLMe 2 ] 1–7 L = [(2-C 9 H 6 N)-CH C(4-MeC 6 H 4)-N(Ar)–],Ar = C 6 H 5(1),4-FC 6 H 4(2),3,4,5-F 3 C 6 H 2(3),C 6 F 5(4),5- t BuC 6 H 4(5),2,6-Me 2 C 6 H通过AlMe 3与相应的β-喹啉基-烯胺配体的反应合成了图3( 6)和2,6 - i Pr 2 C 6 H 3( 7)}。所有配合物均通过1 H和13 C NMR光谱学和元素分析表征。配合物1-3和7的分子结构已通过单晶X射线衍射确认,这表明所有Al原子均采用扭曲的四面体几何形状。测试了这些Al络合物作为ε-己内酯(ε-CL)开环聚合(ROP)的引发剂。聚合结果表明1-5在BnOH的存在下有效地进行,并且其朝向ε-CL的ROP催化行为由芳环(Ar)的对烯