Phototriggered Formation of a Supramolecular Polymer Network Based on Orthogonal H-Bonding and Host-Guest Recognition  

作　　者：BAI Ruixue YANG Xue ZHAO Jun ZHANG Zhaoming YAN Xuzhou 

机构地区：[1]School of Chemistry and Chemical Engineering,Frontiers Science Center for Transformative Molecules,Shanghai Jiao Tong University,Shanghai 200240,P.R.China

出　　处：《Chemical Research in Chinese Universities》2023年第5期777-781,共5页高等学校化学研究（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Nos.22122105,22071152,22101175 and 21901161);the Natural Science Foundation of Shanghai,China(No.20ZR1429200);the State Key Laboratory Project for Mechanical Behavior of Materials,Xi'an Jiaotong University,China(No.20222409).

摘　　要：Supramolecular polymer networks(SPNs)have gained increasing research attention due to their reversible and tunable nature in the preparation of adaptive materials.The use of hierarchical self-assembly techniques is an emerging strategy for the fabrication of smart supramolecular polymer networks,but corresponding study is still rare.Herein,we have reported a novel supramolecular polymer network through complementary host-guest interactions and phototriggered quadruple H-bonding cross-linking.Specifically,we design and synthesize an H1G1-type monomer consisting of a benzo-21-crown-7(B21C7)host(H1),a dialkylammonium salt guest(G1)and a photolabile o-nitrobenzyl ether protected ureidopyrimidinone(Upy)moiety.B21C7 and ammonium moieties can first form a linear supramolecular polymer through complementary host-guest interactions.Under photoirradiation,the Upy groups on the SP side chains were released,and the obtained linear supramolecular polymer could be further transformed into SPN through a quadruple H-bonding cross-linking.Meanwhile,the in situ transformation in the solid state is also accompanied by pronounced enhancement in mechanical properties,which provides foundation for further application of materials in different scenarios.

关 键 词：Host-guest recognition H-BONDING Phototriggered transformation ORTHOGONAL 

分 类 号：O641.3[理学—物理化学]