典型文献
Cyclic oligourea synthesized from CO2:Purification,characterization and properties
文献摘要：
Carbon dioxide(CO2)as a sustainable resource instead of toxic reagents has attracted considerable attention in synthesis of chemicals and polymeric materials.Herein,a kind of cyclic oligourea was synthesized via polycondensation of CO2 with 4,7,10-trioxa-l,13-tridecanediamine(TTD)followed by effective separation and purification processes.We developed an efficient separation strategy in which the linear oligourea molecules were selectively transformed to macromolecular polyurea molecules by a reaction of the-NH2 end group with 4,4'-diphenylmethane diisocyanate(MDI),followed by separation from cyclic oligourea using selected solvents.The structure and physicochemical properties were confirmed by MALDI-TOF mass spectra,NMR,Cryo-EM,thermal analysis and solubility measurement.The well-defined cyclic oligourea was produced with a high purity(99.4％)and the average-number molecular weight(Mn)of 1040 Da.It is semi-crystalline in structure with a melting point of 106℃and glass transition point of-10℃.The cyclic oligourea presented characteristically difference to its linear analogue.This work provides a new member to cyclic polymer family.
文献关键词：
中图分类号：
作者姓名：
Ruhui Shi;Haiyang Cheng;Hongxiang Li;Peixuan Wu;Chao Zhang;Masahiko Arai;Fengyu Zhao
作者机构：
State Key Laboratory of Electroanalytical Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,No.5625 Renmin Rd.,Changchun,130022,China;University of Science and Technology of China,No.96 Jinzhai Rd.,Hefei,230026,China;Jilin Province Key Laboratory of Green Chemistry and Process,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,No.5625 Renmin Rd.,Changchun,130022,China;State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,No.5625 Renmin Rd.,Changchun,130022,China
文献出处：
引用格式：
[1]Ruhui Shi;Haiyang Cheng;Hongxiang Li;Peixuan Wu;Chao Zhang;Masahiko Arai;Fengyu Zhao-.Cyclic oligourea synthesized from CO2:Purification,characterization and properties)[J].绿色能源与环境（英文）,2022(03):477-484
A类：
oligourea,trioxa,tridecanediamine
B类：
Cyclic,synthesized,from,Purification,characterization,properties,Carbon,dioxide,sustainable,resource,instead,toxic,reagents,has,attracted,considerable,attention,synthesis,chemicals,polymeric,materials,Herein,kind,cyclic,was,via,polycondensation,TTD,followed,by,effective,separation,purification,processes,We,developed,efficient,strategy,which,linear,molecules,were,selectively,transformed,macromolecular,polyurea,reaction,NH2,end,group,diphenylmethane,diisocyanate,MDI,using,selected,solvents,structure,physicochemical,confirmed,MALDI,TOF,mass,spectra,NMR,Cryo,EM,thermal,analysis,solubility,measurement,well,defined,produced,high,purity,average,number,weight,Mn,Da,It,semi,crystalline,melting,point,glass,transition,presented,characteristically,difference,its,analogue,This,work,provides,new,member,family
AB值：
0.65195
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