Lighted up by hydrogen-bonding: luminescence behavior and applications of AIEgen-doped interpenetrating network hydrogel  

作　　者：Mengdi Xu Luqin Hua Lihao Gong Jianlei Lu Jinhui Wang Chuanzhuang Zhao 

机构地区：[1]State Key Laboratory Base of Novel Functional Materials and Preparation Science,Ningbo Key Laboratory of Specialty Polymers,School of Materials Science&Chemical Engineering,Ningbo University,Ningbo 315211,China [2]Institute of Drug Discovery Technology,Ningbo University,Ningbo 315211,China

出　　处：《Science China Chemistry》2021年第10期1770-1777,共8页中国科学（化学英文版）

基　　金：the National Natural Science Foundation of China(22075154,21604044);Natural Science Foundation of Zhejiang Province(LY19B040001);Ningbo Public Welfare Science and Technology Project(2019C50072)。

摘　　要：The interaction between the aggregation-induced emissive(AIE) luminogens(AIEgen) and the polymer is the key scientific question in the design of functional AIE hydrogels. In this study, we report the AIE behavior of a poly(acrylic acid)(PAAc) and poly(acrylamide)(PAAm) interpenetrating network(IPN) hydrogel doped with tetra-cationic tetraphenylethene(TCTPE). The cationic AIEgen can bind with PAAc through ionic interaction, while PAAc and PAAm chains can associate with each other through hydrogen-bonds(H-bonds). These two interactions can restrict the intramolecular rotation and thus activate the luminescence of the AIEgen. The PAAc-PAAm H-bonds can be broken by increasing temperature or p H, restoring the intramolecular rotation of the AIEgen and quenching the fluorescence of the hydrogel. Therefore, the TCTPE-doped IPN hydrogel is designed as temperature-and p H-sensitive displayers which can record information imprinted by photo-printing or iono-printing with good switchability and reversibility. Another application of this TCTPE-doped hydrogel is demonstrated as a luminescent soft actuator, which has fast shape deformation and editable fluorescence pattern. The above results reveal a pathway to tune the emission behavior through tuning polymer-polymer and polymer-AIEgen interactions, which may inspire new design strategies of aggregation-induced emissive polymers and broaden their applications.

关 键 词：aggregation induced emission interpenetrating network HYDROGEL actuator hydrogen bond UCST polymer 

分 类 号：TQ427.26[化学工程]