Phosphine-phenol transition metal complex, preparation method therefor, and use thereof

A phosphine-phenol transition metal complex, characterized in that it has a structural formula shown in formula (I),

• wherein, M is selected from Group IVB metals;
• Ar is selected from substituted or unsubstituted C6-C20 aryl;
• X is selected from halogen, C1-C10 hydrocarbyl, n is 1 or 2,
• preferably, C6-C20 aryl is selected from phenyl, 4-methyl phenyl, 4-ethyl phenyl, dimethyl phenyl, vinyl phenyl, anthryl, naphthyl, or biphenyl;
• preferably, for substituted C6-C20 aryl, the substituent thereof is selected from H, halogen, hydroxy, substituted or unsubstituted alkoxy, substituted or unsubstituted C1-C20 hydrocarbyl;
• preferably, alkoxy is C1-C6 alkoxy;
• preferably, for substituted alkoxy and substituted C1-C20 hydrocarbyl, the substituents thereof are selected from halogen, hydroxy, C1-C6 alkyl, halo-substituted C1-C6 alkyl, C1-C6 alkoxy and halo-substituted C1-C6 alkoxy;
• preferably, the halo is selected from fluoro, chloro, bromo, or iodo;
• preferably, C1-C10 hydrocarbyl is selected from C1-C8 hydrocarbyl;
• and/or
• preferably, C1-C20 hydrocarbyl is selected from C1-C6 alkyl.