|
个人信息Personal Information
教授
博士生导师
硕士生导师
性别：男
毕业院校：大连理工大学
学位：博士
所在单位：化工学院
学科：应用化学. 高分子化学与物理. 精细化工
办公地点：西部校区知化楼 D-403
联系方式：大连理工大学西部校区化工学院
电子邮箱：xblu@dlut.edu.cn
Highly regio- and stereo-selective copolymerization of CO2 with racemic propylene oxide catalyzed by unsymmetrical (S,S,S)-salenCo(III) complexes
点击次数：
论文类型：期刊论文
发表时间：2010-08-01
发表刊物：SCIENCE CHINA-CHEMISTRY
收录刊物：SCIE、EI
卷号：53
期号：8
页面范围：1646-1652
ISSN号：1674-7291
关键字：carbon dioxide; propylene oxide; polycarbonate; stereochemistry; asymmetric catalysis polymerization; kinetic resolution
摘要：A novel unsymmetrical (S,S,S)-salen ligand bearing a derived chiral-BINOL was synthesized by the reaction of the condensation product of (1S,2S)-1,2-diaminocyclohexane mono(hydrogen chloride) with 3-adamanyl-5-tert-butyl-2-hydroxybenzalde-hyde and 3-formoyl-2-hydroxy-2'-alkyloxy-1,1'-binaphthyl, which originated from (S)-1,1'-bi-2-naphthol via a four-step reaction. The cobalt complexes of this ligand, in conjunction with a nucleophilic cocatalyst, exhibited excellent activity in catalyzing asymmetric, regio- and stereo-selective copolymerization of CO2 and racemic propylene oxide. The highest record of kinetic resolution coefficient (K-rel) was obtained with the use of binary catalyst system consisting of (S,S,S)-salenCo(III) complex 1c and bulky bis(triphenylphosphine)-iminium chloride (PPNCl). The resulting poly(propylene carbonate)s have more than 99% carbonate linkages and more than 98% head-to-tail content.