Diimine metal complex, preparation method therefor, and application thereof

A diimine-metal complex represented by Formula I:

• wherein,
• R1 and R2 are each independently a C1-C30 hydrocarbyl with or without a substituent Q;
• R3 and R4 are each independently selected from the group consisting of hydrogen, halogen, hydroxy, C1-C20 hydrocarbyl with or without the substituent Q, C1-C20 alkoxy with or without the substituent Q, C2-C20 alkenoxy with or without the substituent Q, C2-C20 alkynoxy with or without the substituent Q, C6-C20 aryloxy with or without the substituent Q, C7-C20 aralkoxy with or without the substituent Q, and C7-C20 alkaryloxy with or without the substituent Q, and adjacent R3 and R4 groups are optionally joined to form a ring or ring system;
• each R11 is independently a C1-C20 hydrocarbyl with or without the substituent Q;
• each Y is independently a Group VIA non-metal atom;
• each M is independently a Group VIII metal;
• and
• each X is independently selected from the group consisting of halogen, C1-C10 hydrocarbyl with or without the substituent Q, and C1-C10 hydrocarbyloxy with or without the substituent Q, wherein each substituent Q is independently selected from the group consisting of halogen, hydroxy, C1-C10 alkyl, halogenated C1-C10 alkyl, C1-C10 alkoxy, and halogenated C1-C10 alkoxy;
• R3 and R4 are each independently selected from the group consisting of hydrogen, halogen, hydroxy, C1-C10 alkyl with or without the substituent Q, C2-C10 alkenyl with or without the substituent Q, C2-C10 alkynyl with or without the substituent Q, C3-C10 cycloalkyl with or without the substituent Q, C1-C10 alkoxy with or without the substituent Q, C2-C10 alkenoxy with or without the substituent Q, C2-C10 alkynoxy with or without the substituent Q, C3-C10 cycloalkoxy with or without the substituent Q, C6-C15 aryl with or without the substituent Q, C6-C15 aryloxy with or without the substituent Q, C7-C15 aralkyl with or without the substituent Q, C7-C15 aralkoxy with or without the substituent Q, C7-C15 alkaryl with or without the substituent Q, and C7-C15 alkaryloxy with or without the substituent Q.