Poly[2]catenane Gels Based on Sequential Assembly of Small Molecules  

作　　者：Hanwei Zhang Jinsa Li Ziqing Hu Xiaofan Ji 

机构地区：[1]Xi'an Rare Metal Materials Institute Co.Ltd.,Xi'an,Shaanxi 710016,China [2]Key Laboratory of Materials Chemistry for Energy Conversion and Storage,Ministry of Education,Hubei Key Laboratory of Materials Chemistry and Service Failure,Hubei Engineering Research Centerfor Biomaterials and Medical Protective Materials,State Key Laboratory of Materials Processing and Die&Mould Technology,School of Chemistry and Chemical Engineering,Huazhong University of Science and Technology,Wuhan,Hubei 430074,China

出　　处：《Chinese Journal of Chemistry》2024年第22期2699-2704,共6页中国化学（英文版）

基　　金：X.Ji acknowledges funding from the National Natural Science Foundation of China(No.22001087);X.Ji also appreciates the support from the Huazhong University of Science and Technology,where he is being supported by Fundamental Research Funds for the Central Universities(Grant 2020kfyXJJS013);X.Ji appreciates support from the Interdisciplinary Research Program of HUST(2023JCYJ013).

摘　　要：Polycatenane gels have attracted extensive attention due to their high degree of freedom and mobility.However,the syntheses of poly[2]catenane gels reported to date all rely on the polymer as the backbone.Herein,we prepared poly[2]catenane gels based on entirely sequential assembly of small molecules.Monomer M1 with two unclosed rings was first prepared,which self-assembled to form supramolecular polymers(SPs)via hydrogen bonding andπ-πinteractions.Upon adding small molecule monomers M2 and M3 with aldehyde groups,ring closing of SPs occurred because the amino groups in the SPs reacted with M2 to form imine bonds.In addition,M3,which had twice the number of aldehyde groups as M2,enabled SPs to ring-close,causing the proceeding of crosslinking process at the same time.Thus linear SPs were transformed into poly[2]catenane gel networks.Due to the presence of hydrogen bonds in the poly[2]catenane gel,the gel also possessed stimulus responsiveness and self-healing properties.

关 键 词：catenane GEL Dynamic covalent bond Non-covalent bond Self-assembly Stimuli-responsiveness Supramolecular chemistry Networks Hydrogen bonding 

分 类 号：O63[理学—高分子化学]