Crystalline CO2-based polycarbonates prepared from racemic catalyst through intramolecularly interlocked assembly
发表时间：2019-03-09
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- 论文类型：
- 期刊论文
- 第一作者：
- Liu, Ye
- 通讯作者：
- Lu, XB (reprint author), Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116024, Peoples R China.
- 合写作者：
- Ren, Wei-Min,Zhang, Wei-Ping,Zhao, Rong-Rong,Lu, Xiao-Bing
- 发表时间：
- 2015-10-01
- 发表刊物：
- NATURE COMMUNICATIONS
- 收录刊物：
- SCIE、PubMed、Scopus
- 文献类型：
- J
- 卷号：
- 6
- 页面范围：
- 8594
- ISSN号：
- 2041-1723
- 摘要：
- The crystalline stereocomplexed polycarbonates can be prepared by mixing enantiopure polymers with opposite configuration, which derived from the asymmetric copolymerization with CO2 using enantiopure catalyst or/and chiral epoxides. Herein, we develop a powerful strategy for producing crystalline intramolecular stereocomplexed polycarbonates from racemic catalysts, which possess similar thermal stability and crystalline behaviour in comparison with the stereocomplexes by mixing opposite enantiopure polymers. Living polymer chains shuttle between catalyst molecules with different configurations to produce diastereomeric active species which is suggested to be responsible for the formation of isotactic multiblock polycarbonates in racemic bimetallic cobalt catalyst-mediated stereoselective copolymerization of CO2 and meso-epoxides. Solid-state NMR spectroscopy study suggests that the interaction in the carbonyl and methine regions is responsible for the strong crystallization capacity and compact package structure in the crystalline polycarbonates.
- 是否译文：
- 否
