Asymmetric polymerization of N-vinylcarbazole with optically active anionic initiators

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• 作者：Wei Hu ; Jing Cao ; Yi-ling Huang ; Sai Liang
• 关键词：Helical polymer ; Anionic polymerization ; Chiral carbon anionic initiator ; N ; vinylcarbazole
• 刊名：Chinese Journal of Polymer Science
• 出版年：2015
• 出版时间：November 2015
• 年：2015
• 卷：33
• 期：11
• 页码：1618-1624
• 全文大小：390 KB
• 参考文献：1.Okamoto, Y., Oike, H. and Yonezawa, N., Tcichemicals, 2011, 145: 2
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• 作者单位：Wei Hu (1)
  Jing Cao (1)
  Yi-ling Huang (1)
  Sai Liang (1)
  
  1. Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Hunan, 411105, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Condensed Matter Physics
  Industrial Chemistry and Chemical Engineering
  Polymer Sciences
  Characterization and Evaluation of Materials
  
• 出版者：Chinese Chemical Society and Institute of Chemistry, CAS, co-published with Springer
• ISSN：1439-6203

文摘

The anionic polymerization of N-vinylcarbazole (NVC) by using optically active anionic initiators such as the lithium salts of (S)-1-(9H-fluoren-2-yl)-4-isopropyl-4,5-dihydrooxazole ((S)-1-FIDH) and (S)-2-(9H-fluoren-2-yl)-4- isopropyl-4,5-dihydrooxazole ((S)-2-FIDH) and complexes of (-)-Sparteine with n-butylithium (n-BuLi-(-)-Sp) or fluorenyl lithium (FILi-(-)-Sp) was achieved. The yield and specific rotation of poly(N-vinylcarbazole)s (poly(NVC)s) were considerably affected by the molar ratio of (S)-FIDH to NVC. The highest yield and specific rotation were obtained with Li- (S)-1-FIDH as an initiator, with a molar ratio of monomer and initiator [M]/[I] = 10/1. The effects of the chiral initiators, type of solvent and the polymerization temperature were investigated. The obtained optical activity of polymers was attributed to asymmetric induction of the chiral initiators. Keywords Helical polymer Anionic polymerization Chiral carbon anionic initiator N-vinylcarbazole