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含有膦基苯磺酸(PO)配体的烷基金属配合物表现出罕见的烯烃聚合催化性质,其不但可以催化乙烯均聚形成线性聚乙烯,而且可以催化乙烯与众多的极性单体如CH2=CHX、CO等共聚产生功能化线性聚烯烃.总结了PO配体的结构特点和(PO)Pd(Ⅱ)配合物引发的新型聚合反应,综述了(PO)Ni(Ⅱ)催化剂在催化乙烯和极性单体共聚方面的应用,以及含有膦基二磺酸配体OPO的Pd(Ⅱ)、Ru(Ⅳ)催化剂的特殊催化性质.另外,从配体的对称性、柔性和轴向官能团位阻以及纯电子效应等方面对PO金属催化剂的构效关系和共聚催化反应机理进行了探讨.
Alkyl metal complexes containing phosphinobenzene sulfonic acid (PO) ligands exhibit a rare olefin polymerization catalysis which not only catalyzes the homopolymerization of ethylene to linear polyethylene but also catalyzes the copolymerization of ethylene with a number of polar monomers such as CH2 = CHX and CO to produce functionalized linear polyolefins.The structural characteristics of PO ligands and the new polymerization reactions induced by (PO) Pd (Ⅱ) complexes were summarized.The effects of (PO) Ni (Ⅱ) The copolymerization of ethylene and polar monomer, and the special catalysis of Pd (Ⅱ) and Ru (Ⅳ) catalysts containing phosphodisulfonic acid ligand OPO.Furthermore, based on the ligand symmetry, flexibility and axial Functional group steric hindrance and pure electronic effect on the structure-activity relationship of PO metal catalysts and copolymerization catalytic mechanism were discussed.