The synthesis of cyclic polymer is an important topic in polymer chemistry.Herein,we report a one-step method to prepare cyclic polypyrazoles.Monomers with two functional groups,diazo and alkyne,were synthesized and polymerized via 1,3-diploar cycloaddition in bulk under heating without any catalyst.Polypyrazoles with molecular weights in the range of 3800-4400 g/mol and yields in the range of 78.8-98.7％were successfully synthesized.No chain end group was detected by LC-QTOF-MS and FTIR,which proves the cyclic structure of polypyrazoles.What is noteworthy is that the cyclic polypyrazoles can self-assemble into vesicles during the reprecipitation process,which was proved by the results of SEM and TEM.The reason for that is the formation of intermolecular hydrogen bond between NH and ester groups.

Zhen Lu;Bogeng Guo;Yulai Zhao;Linxi Hou;Longqiang Xiao

Department of Materials-Oriented Chemical Engineering,College of Chemical Engineering,Fuzhou University,Fuzhou 350116,China;Fujian Key Laboratory of Advanced Manufacturing Technology of Specialty Chemicals,Fuzhou University,Fuzhou 350116,China

中国化学快报（英文版）

[1]Zhen Lu;Bogeng Guo;Yulai Zhao;Linxi Hou;Longqiang Xiao-.One-step synthesis of cyclic polypyrazole and the self-assembly vesicles driven by hydrogen bond)[J].中国化学快报（英文版）,2022(02):825-829

polypyrazole,polypyrazoles,diploar,Polypyrazoles,reprecipitation

One,step,synthesis,cyclic,self,assembly,vesicles,driven,by,hydrogen,bond,important,topic,chemistry,Herein,report,one,method,prepare,Monomers,two,functional,groups,diazo,alkyne,were,synthesized,polymerized,via,cycloaddition,bulk,under,heating,without,any,catalyst,weights,range,yields,successfully,No,chain,end,was,detected,LC,QTOF,FTIR,which,proves,structure,What,noteworthy,that,can,assemble,into,during,process,proved,results,TEM,reason,formation,intermolecular,between,NH,ester

0.553317