Fluorene rare earth metal catalyst, preparation method and application thereof

Abstract

The invention provides a fluorene rare earth metal catalyst, a preparation method and an application thereof. The fluorene rare earth metal catalyst has a structure expression showed as a formula (I), wherein R represents hydrogen, C1-8 silane group, C1-8 amino group or C1-8 alkoxyl group; R' represents hydrogen or C1-8 alkyl group; Ln represents a rare earth element of an element periodic table III B; and N represents 0 or 1. The novel fluorine rare earth metal catalyst can be used for catalyzing an olefin coordination polymerization reaction, a carbon dioxide and epoxide polymerization reaction and an alkyne polymerization reaction; multiple reaction types can be catalyzed by using the catalyst so that a possibility of realizing the application of the novel cationic-type rare earth metal organic catalyst in production and life is provided; and at the same time, the prepared fluorene rare earth metal catalyst has the advantages of good stability, regular shape, good stereo structure and high mechanical strength.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a fluorene rare earth metal catalyst, a preparation method and an application. Background technique [0002] In recent years, a new type of olefin polymerization catalyst system - cationic rare earth metal organocatalysts has emerged, which is a kind of olefin polymerization catalyst system after cationic group 4 metal organocatalysts. The cationic rare earth metal organic catalyst has the following advantages: it has high unsaturation, instability, high reactivity, and can avoid the occurrence of olefin poisoning. Due to the above-mentioned advantages of cationic rare earth organocatalysts, the competitive coordination insertion of weakly coordinated monoolefins can be achieved by adjusting the steric hindrance of the metal center of cationic rare earth catalysts. [0003] The cationic rare earth metal organic catalyst is composed of a rare earth metal organic compound and a ...

AI Technical Summary

Problems solved by technology

Researchers at home and abroad use fluorene and fluorene derivatives as ligands for cationic rare earth metal organocatalysts to prepare cationic rare earth metal organocatalysts, and use the obtained catalysts to catalyze the coordination polymerization of olefins, but the catalysts can catalyze The reaction types of olefin coordination polymerization are limited, and the existing catalysts can only be used to promote the coordination homopolymerization of olefins, but cannot promote the coordination copolymerization of olefins

Cationic rare earth metal organocatalysts have limited types of catalytic reactions, which will greatly limit the application of cationic rare earth metal organocatalysts in actual production and life

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