Stereoregular Polycarbonate Synthesis: Alternating Copolymerization of CO2 with Aliphatic Terminal Epoxides Catalyzed by Multichiral Cobalt(III) Complexes
发表时间：2019-03-09
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- 论文类型：
- 期刊论文
- 第一作者：
- Ren, Wei-Min
- 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：
- Liu, Ye,Wu, Guang-Peng,Liu, Jie,Lu, Xiao-Bing
- 发表时间：
- 2011-11-15
- 发表刊物：
- JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
- 收录刊物：
- Scopus、SCIE、EI
- 文献类型：
- J
- 卷号：
- 49
- 期号：
- 22
- 页面范围：
- 4894-4901
- ISSN号：
- 0887-624X
- 关键字：
- carbon dioxide; catalysis; cobalt; copolymerization; epoxide; isotactic; polymerization catalysis; regioselective ring opening; ring-opening polymerization; stereochemistry control
- 摘要：
- Completely stereoregular polycarbonate synthesis was achieved with the use of unsymmetric multichiral cobalt-based complexes bearing a derived chiral BINOL and an appended 1,5,7-triabicyclo[4.4.0] dec-5-ene as catalyst for the copolymerization of CO2 and aliphatic terminal epoxides at mild conditions. The (S,S,S)-Co(III) complex 1c with sterically hindered substituent group is more stereoregular catalyst for the copolymerization of CO2 and racemic propylene oxide to afford a perfectly regioregular poly(propylene carbonate) (PPC), with >99% head-to-tail linkages, >99% carbonate link-ages, and a K-rel of 24.4 for the enchainment of (R)-epoxide over (S)-epoxide. The isotactic PPC exhibits an enhanced glass transition temperature of 47 degrees C, which is 10-12 degrees C higher than that of the corresponding irregular polycarbonate. (C) 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 49: 4894-4901, 2011
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- 否
