Design of synergetic catalysts for efficient and controlled polymerization of lactones

为了优化多步开环聚合，需要调整分子催化剂的Lewis酸度和亲核性之间的平衡，因此设计高效的开环聚合分子催化剂是一项困难的工作。本文研究了一种开环聚合的协同催化体系。研制了-己内酯（CL）。路易斯酸和亲核试剂同时存在路易斯酸激活了CL活化的CL被弱亲核试剂附着。在该体系中，可以实现路易斯酸度和亲核性的独立调节。

It is difficult to design an efficient molecular catalyst for the ring-opening polymerization of lactones, because the balance of the molecular catalyst between Lewis acidity and nucleophilicity should be tuned to optimize the multistep process polymerization. In this research, a synergetic catalytic system for the ring-opening polymerization of.-caprolactone(CL) was developed. Both a Lewis acid and a nucleophile coexisted and the Lewis acid activated CL and the activated CL is attached by the weak nucleophile. In this system, independent tuning of the Lewis acidity and the nucleophilicity can be achieved.