A multistimuli-responsive fluorescent hydrogel based on a fluorescence response to macromolecular segmental motion  

作　　者：Botian Li Bo Yan Jian Wang Yichi Zhang Ziyan Qiu Jundang Liang Qiong Zhou 

机构地区：[1]College of New Energy and Materials,China University of Petroleum,Beijing 102249,China

出　　处：《Nano Research》2023年第10期12098-12105,共8页纳米研究（英文版）

基　　金：the National Natural Science Foundation of China(No.51903250).

摘　　要：Fluorescent hydrogels with fast and reversible responses have attracted extensive attention, and it remains a challenge to designmultistimuli-responsive fluorescent hydrogel through a facile and versatile method. Meanwhile, the segmental motion inhydrogels is of significance for the various functions of hydrogels such as chemical reactivity, self-healing, and mechanicalstrength, etc., however, it is difficult and complicated to in situ investigate the segmental motion under different conditions. In thiswork, a multistimuli-responsive fluorescent hydrogel was designed and fabricated by introducing a tetraphenylethylene (TPE)derivative as a nonaggregated crosslinker in the gel network. Since the intermolecular rotation of TPE at the crosslinking pointwas directly integrated with the dynamic conformational transition of the macromolecular network, the mobility of macromolecularsegments can be monitored by the fluorescence intensity of the hydrogel. The prepared hydrogel has promising fluorescenceresponses to temperature, pH, metal ions, and hydrogen bonding agents, and characterization of the fluorescence and the chainsegmental motion showed that the weaker the mobility of the network macromolecular chain is, the stronger the fluorescenceintensity is. Furthermore, due to the multistimuli-responsive fluorescence of the hydrogel, such fluorescent hydrogels can bedesigned as reversible patterning displays and biomimetic color/shape adjustable actuators, with various potential applications.

关 键 词：multistimuli response fluorescent hydrogel aggregation-induced emission(AIE) segment motion biomimetic actuator 

分 类 号：O63[理学—高分子化学]