水杨醛亚胺前过渡金属烯烃聚合催化剂研究进展

Advance in Salicylaldimine Early Transition Metal Catalysts for Olefin Oligomerization and (Co) Polymerization

水杨醛亚胺前过渡金属催化剂是由水杨醛亚胺配体和前过渡金属配位生成的一种性能优越、用途广泛的烯烃聚合催化剂。水杨醛亚胺配体具有易于通过有机合成手段引入不同取代基的特点,因此通过改变催化活性中心附近的空间位阻效应、电子效应及金属活性中心数量,可以实现对聚合活性、聚合产物及产物分布的调控。文中综述了水杨醛亚胺前过渡金属催化剂的开发现状,重点阐述了水杨醛亚胺前过渡金属催化剂的配体结构对催化性能的影响,涉及到高选择性乙烯三聚、乙烯/α-烯烃、乙烯/极性单体共聚、乙烯聚合生产超高分子量聚乙烯等众多烯烃聚合领域,为这类催化剂的深入研究及工业化应用提供参考。

The synthesis of salicylaldimine early transition metal catalyst is by coordination reaction of salicylaldiminato ligand with early transition metals which have superior performance and widespread use.The steric and electric effect and the number of active site could be tuned by ligand structure through organic synthesis.Consequently,ligand structure has significant effect on catalytic activity and selectivity.This paper reviewed development status of salicylaldimine early transition metal catalysts,elaborated significant substitute effect of the ligand and widely application of catalysis of olefin and provided reference for further research and industrial application of this kind of catalyst.