高等学校化学学报 ›› 2014, Vol. 35 ›› Issue (3): 626.doi: 10.7503/cjcu20130958

• 高分子化学 • 上一篇    下一篇

席夫碱-铝配合物的合成及对丙交酯的立体选择性聚合

曲智1,2, 李想1, 庞烜1, 段然龙1, 高波1, 陈学思1()   

  1. 1. 中国科学院长春应用化学研究所, 生态环境高分子材料重点实验室, 长春 130022
    2. 中国科学院大学, 北京 100049
  • 收稿日期:2013-09-29 出版日期:2014-03-10 发布日期:2019-08-01
  • 作者简介:联系人简介: 陈学思, 男, 博士, 研究员, 博士生导师, 主要从事生物医用材料研究. E-mail: xschen@ciac.ac.cn
  • 基金资助:
    国家自然科学基金(批准号: 21204082, 51173183, 21004061, 51021003)和国家“八六三”计划项目 (批准号: 2011AA02A202)资助

Synthesis of Aluminum-Schiff Base Catalyst and Their Stereoselective Polymerization of Lactides

QU Zhi1,2, LI Xiang1, PANG Xuan1, DUAN Ranlong1, GAO Bo1, CHEN Xuesi1,*()   

  1. 1. Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
    2. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2013-09-29 Online:2014-03-10 Published:2019-08-01
  • Contact: CHEN Xuesi E-mail:xschen@ciac.ac.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(Nos.21204082, 51173183, 21004061, 51021003) and the National High Technology Research and Development Program of China(No.2011AA02A202)

摘要:

设计、 合成了一系列不对称席夫碱配体, 得到了相应的金属铝配合物. 研究了配合物在外消旋丙交酯的开环聚合反应中的催化性能. 结果表明, 系列配合物对外消旋丙交酯(rac-LA)的聚合催化活性明显提高, 并具有立体选择性.

关键词: 丙交酯, 生物降解, 立体选择性聚合, 席夫碱

Abstract:

A series of asymmetric Schiff-base ligands and their aluminum Al(Ⅲ) complexes that contained different steric substituent were designed and synthesized. The structures of ligands and their complexes were characterized. One crystal of Schiff-base aluminum complex was obtained. X-Ray diffraction analyses showed that the central aluminum atoms of the complex adopt twisted four pyramid geometry. They were chiral but racemic complexes with two enantiomers in solid state. Their catalytic properties in the solution polymerization of racemic lactides(rac-LA) in the presence of 2-propanol were investigated in detail. All of the complexes had poor stereoselectivity for ring-opening polymerization(ROP) of rac-LA(Pm about 0.55), the polymerization rate of asymmetric complex was much faster than symmetric complex in ROP of rac-LA. The results evaluate that the substituent of ligands has great influence on the catalytic properties of the complex.

Key words: Lactide, Biodegradable, Stereoselective polymerization, Schiff-base

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