A stimuli responsive lanthanide-based hydrogel possessing tunable luminescence by efficient energy transfer pathways

作     者：Yuan Wang Jinglei Chen Yuan Shang Peng Li Huanrong Li Yuan Wang;Jinglei Chen;Yuan Shang;Peng Li;Huanrong Li

作者机构：Tianjin Key Laboratory of Chemical Process SafetySchool of Chemical Engineering and TechnologyNational-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources UtilizationHebei University of TechnologyTianjin 300130China 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2022年第40卷第5期

页      面：696-701,I0001页

核心收录：

学科分类：081702[工学-化学工艺] 0709[理学-地质学] 0819[工学-矿业工程] 08[工学] 0817[工学-化学工程与技术] 0708[理学-地球物理学] 0703[理学-化学] 

基　　金：Project supported by the National Natural Science Foundation of China(21771050) the Natural Science Foundation of Hebei Province(B2018202134,B2016202149,B2016202147) Outstanding Innovative Topics of Hebei Province(220056)。 

主　　题：Energy transfer Lanthanides Stimuli-responsive hydrogel Luminescence Rare earths 

摘      要：Energy transfer as an important component in light-harvesting antenna systems can mimic effectively natural photosynthesis processes,showing great potential in optoelectronic devices.Herein,we report a responsive polymeric hydrogel based on the combination of excited state intramolecular proton transfer(ESIPT) molecule(Salicylic acid,Sal) and terbium(Ⅲ)(Tb^(3+)),as enabled by external stimuli to construct artificial light-harvesting antenna systems.Benefiting from unique photophysical properties of Sal,the synthesized hydrogel displays a temperature-dependent reversible opaque?transparent states transition,accompanied with an interesting photoluminescence behavior.Moreover,by further incorporating europium(Ⅲ)(Eu^(3+)) into the hydrogel,we demonstrate well-defined cascades of energy transfer that provides a tunable optical output from the collection of lanthanides by the excitation of a common sensitizer(Sal) upon base vapor stimulation.Efficient energy transfer efficiency from Tb^(3+) to Eu^(3+),as high as 97.8%,was also obtained as established by the time-resolved fluorescence spectroscopy analysis.