【摘 要】
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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(acrylami
【机 构】
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State Key Laboratory Base of Novel Functional Materials and Preparation Science,Ningbo Key Laborator
论文部分内容阅读
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 lumi-nescence of the AIEgen.The PAAc-PAAm H-bonds can be broken by increasing temperature or pH,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 pH-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.
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