Crystalline-gradient polycarbonates prepared from enantioselective terpolymerization of meso-epoxides with CO2
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,He, Ke-Ke,Lu, Xiao-Bing
- 发表时间：
- 2014-12-01
- 发表刊物：
- NATURE COMMUNICATIONS
- 收录刊物：
- SCIE、PubMed、Scopus
- 文献类型：
- J
- 卷号：
- 5
- 页面范围：
- 5687
- ISSN号：
- 2041-1723
- 摘要：
- The development of efficient processes for CO2 transformation into useful products is a long-standing goal for chemists, since CO2 is an abundant, inexpensive and non-toxic renewable C1 resource. Here we describe the enantioselective copolymerization of 3,4-epoxytetrahydrofuran with CO2 mediated by biphenol-linked dinuclear cobalt complex, affording the corresponding polycarbonate with >99% carbonate linkages and excellent enantioselectivity (up to 99% enantiomeric excess). Notably, the resultant isotactic polycarbonate is a typical semicrystalline polymer, possessing a melting point of 271 degrees C. Furthermore, the enantioselective terpolymerization of 3,4-epoxytetrahydrofuran, cyclopentene oxide and CO2 mediated by this dinuclear cobalt complex gives novel gradient polycarbonates, in which the decrement of one component and the increment of the other component occur sequentially from one chain end to the other end. The resultant terpolymers show perfectly isotactic structure and have unique crystalline-gradient nature, in which the crystallinity continuously varies along the main chain.
- 是否译文：
- 否
