Amino aryloxy rare earth metal amide and application thereof

Abstract

The invention discloses an amino aryloxy rare earth metal amide and application thereof. The general formula of the amino aryloxy rare earth metal amide is [NO]2LnN(SiMe3)2Li2(THF)2, wherein Ln is a rare earth metal; and [NO]=p-R-C6H4NCH2(3-R-5-R-C6H2-2-O), R is selected from one of hydrogen or saturated alkyl groups of C1 to C4, and R and R are selected from one of methyl groups or tertiary butyl groups. The amino aryloxy rare earth metal amide can be used as a monocomponent catalyst to highly actively catalyze the ring-opening polymerization of L-lactide under mild conditions to obtain poly (L-lactide) with high molecular weight and proper molecular weight distribution.

Description

technical field

[0001] The invention relates to a rare earth metal complex containing N, O double anion ligands, in particular to an aminoaryloxy rare earth metal amide and its catalytic application. Background technique

[0002] Aliphatic polyester is a kind of biodegradable polymer material, which can be degraded under physiological conditions, and the degradation products are non-toxic. Therefore, it has been used clinically as a compatible material for biological tissues, such as: polycaprolactone, because of its high solubility, low melting point, and compatibility with a variety of polymers, can be used as a polymer Plasticizers, etc.; polylactic acid, which is widely used in drug controlled release systems, orthopaedic fixation materials, and tissue engineering scaffold materials because of its characteristics. In view of some broad application prospects of aliphatic polyesters, its research has received extensive attention.

[0003] Ring-opening polymerization is a...

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