Sulfanion-initiated open-vessel anionic ring-opening polymerization of N-sulfonyl aziridines  

作　　者：Meng Huo Yawen Bian Chunyang Yu Gansheng Tong Chongyin Zhang Xinyuan Zhu 

机构地区：[1]School of Chemistry'and Chemical Engineering,Frontiers Science Center for Transformative Molecules,Shanghai Key Laboratory of Electrical Insulation and Thermal Aging,Shanghai Jiao Tong University,Shanghai 200240,China [2]Key Laboratory of Surface&Interface Science of Polymer Materials of Zhejiang Province,Department of Chemistry,Zhejiang Sci-Tech University,Hangzhou 310018,China [3]Shanghai Aerospace Equipments Manufacturer Co.,Ltd.,Shanghai Engineering Research Center of Specialized Polymer Materials for Aerospace,Shanghai 200245,China

出　　处：《Science China Chemistry》2021年第10期1778-1785,共8页中国科学（化学英文版）

基　　金：the National Natural Science Foundation of China(21905171,21774077);Shanghai Municipal Government(18JC1410800)。

摘　　要：Anionic ring-opening polymerization(AROP)of N-sulfonyl aziridines is an important synthetic route to linear polyethyleneimine(PEI)and its derivatives.In most cases,inert atmosphere and dry solvent were needed because of the oxygen-and water-sensitive initiators/catalysts used.Therefore,the AROP of N-sulfonyl aziridines that can be entirely operated in air atmosphere is still a challenging task.Herein,we report a series of sulfanions,including xanthates,dithiocarbamates,dithiobenzoates,thioacetates,and thiolates,as the initiators for the AROP of N-sulfonyl aziridines.Due to their good stability,openvessel polymerization was achieved with high livingness,affording a range of well-definedα-,ω-telechelic poly(N-sulfonyl aziridine)homopolymers and block copolymers with narrow dispersities and tunable molecular weights.Theα-end group of these polyaziridines was readily converted to thiol group,which enabled further post-polymerization functionalization with benzyl acrylate and poly(ethylene glycol)via thiol-ene click chemistry.The establishment of open-vessel sulfanion-initiated AROP of N-sulfonyl aziridines thus lays a solid foundation for the bulk preparation and application of poly(N-sulfonyl aziridine)s and PEI derivatives.

关 键 词：anionic ring-opening polymerization sulfanion open-vessel N-sulfonyl aziridines 

分 类 号：TQ316.341[化学工程—高聚物工业]