Low-molecular-weight photoresponsive supramulecular hydrogel based on a dicationic azobenzene-bridged pyridinium hydrogelator  

作　　者：Si-Tai Zheng Huan-Huan Yin Zhao-Guang Ma Nan-Li Sheng Tian-Guang Zhan Xiao-Yang Yan Jiecheng Cui Li-Juan Liu Kang-Da Zhang 

机构地区：[1]Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Science, Zhejiang Normal University [2]Xingzhi College of Zhejiang Normal University

出　　处：《Chinese Chemical Letters》2019年第3期707-709,共3页中国化学快报（英文版）

基　　金：the National Natural Science Foundation of China (Nos. 21502216 and 21602205);Natural Science Foundation of Zhejiang Province (No. LQ19B020019) for the financial support to this research

摘　　要：Low-molecular-weight supramolecular hydrogels are of significant attractive soft materials as particular functions can be facilely introduced by the straightforward fabrication of such self-assembled systems. In this study, an azobenzene-bridged dicationic pyridinium salt was synthesized, from which photoresponsive supramolecular hydrogel could be fabricated through the π-π stacking and hydrophobic interactions in the aqueous solution. By taking advantages of the UV-vis light induced E/Z photoisomerization behaviors of the incorporated azobenzene photochromophore, reversible gel-sol transformation of such supramolecular hydrogel could be achieved under the alternating UV-vis irradiation conditions. We believed that this photoresponsive supramolecular hydrogel will be a good supplementary in the creation of intelligent soft material.Low-molecular-weight supramolecular hydrogels are of significant attractive soft materials as particular functions can be facilely introduced by the straightforward fabrication of such self-assembled systems. In this study, an azobenzene-bridged dicationic pyridinium salt was synthesized, from which photoresponsive supramolecular hydrogel could be fabricated through the π-π stacking and hydrophobic interactions in the aqueous solution. By taking advantages of the UV-vis light induced E/Z photoisomerization behaviors of the incorporated azobenzene photochromophore, reversible gel-sol transformation of such supramolecular hydrogel could be achieved under the alternating UV-vis irradiation conditions. We believed that this photoresponsive supramolecular hydrogel will be a good supplementary in the creation of intelligent soft material.

关 键 词：Supramolecular self-assembly Hydrogels Photo-responsiveness AZOBENZENES Smart soft materials 

分 类 号：O6[理学—化学]