1998年美国Brookhart[1]和英国帝国大学的G ibson[2]各自独立报道了含有吡啶基团的二亚胺型的铁(II)和钴(II)催化剂,该类催化剂显示了很高的乙烯聚合的活性(高达107g mol-1h-1),而且这种新型催化剂具有制备容易,价格便宜,活性高,耐极性官能团性能较好等优点,使得三齿配体类的后 In 1998, Brookhart [1] from the United States and G ibson [2] from the University of the British Empire independently reported that the diimine-containing iron (II) and cobalt (II) catalysts containing pyridyl groups showed high Ethylene polymerization activity (up to 107g mol-1h-1), and this new catalyst has the advantages of easy preparation, low price, high activity, good resistance to polar functional groups, etc., so that after the tridentate ligand type