多齿配位金属化合物选择性聚合制备脂肪族聚酯

项目名称： 多齿配位金属化合物选择性聚合制备脂肪族聚酯

项目编号： No.51503203

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 一般工业技术

项目作者： 段然龙

作者单位： 中国科学院长春应用化学研究所

项目金额： 21万元

中文摘要： 有机金属配合物在药学、分析化学、催化等领域具有非常广泛的应用。其中多齿配体的Al、Zn、Mg配合物在外消旋丙交酯（rac-LA）的立体选择性聚合方面具有较好的催化性能，目前研究较多的是对称结构的席夫碱配合物，对恶唑啉环多齿配体的研究较少。虽然一些席夫碱配合物的选择性较高，但其催化活性较低，本项目将设计合成一系列恶唑啉环多齿配体与金属配合物来实现对rac-LA的高活性与高选择性聚合，制备高性能聚酯材料。配体的结构设计为具有大立体位阻基团，同时有NNNN、NNN以及NNO等多种配位结构，并在此基础上设计了一类具有光敏感基团取代的配体与配合物。研究配合物结构与其催化性能之间的规律、不同中心金属对配合物催化性能的影响规律，研究光控开关对配合物催化性能的影响规律。研究聚合物的微观结构，筛选出同时具有高立体选择性和相当的催化活性的高性能催化体系。通过本研究，将得到具有自主知识产权的高性能催化剂。

中文关键词： 聚乳酸；立体选择性聚合；金属配合物；恶唑啉配体

英文摘要： Organometallic complexes have found wide application in many fields such as medication, analytic chemistry, and catalysis. Polydentate ligated Al, Zn and Mg complex achieve remarkable result in the stereoselective polymerization of rac-lactide. However, a lot of detailed researchs foucs on Schiff Base Ligands, there is a few oxazoline metal complex has reported. Although, a series of symmetric Schiff-base metal complexes have high stereoselective in ring-opening polymerization (ROP) of rac-lactide, but its activity in ROP of rac-lactide is very low, that obstruct its common application. This project will foucs on the design and synthesize a series of oxazoline polydentate ligated metal complex with expecting properties such as high activity and well stereoselective. The the structural design of complex havs big steric hindrance group, also have many kinds of coordination structure such as NNNN, NNN, NNO. And based on the above complex we design a kind of ligands and complexes with light sensitive group substituted. In this project we will research on the relation between the structure of complex and catalytic properties and the relation between the different central metal and catalytic properties, and study the influence of temporally switchable polymerization processes on complexes catalysis performance. This project will research of polymer microstructure to get high-performance catalytic systems that has high stereoselectivity and considerable activity at the same time. Through this study, we will be high performance catalyst with independent intellectual property rights, and promote the development of high-performance polyester material.

英文关键词： polylactide;stereoselectivity polymerization;metal complex;oxazoline ligand