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
• 来源期刊: 稀土学报（英文版）
• 年，卷（期）: 2022,（5）
• 所属期刊栏目: SPECTROSCOPY, LUMINESCENCE AND PHOSPHORS
• 页码范围: 696-701
• 页数: 6页
• 语种: 英文

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)(Tb3+),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 tran-sition,accompanied with an interesting photoluminescence behavior.Moreover,by further incorporating europium(Ⅲ)(Eu3+)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 Tb3+to Eu3+,as high as 97.8％,was also obtained as established by the time-resolved fluorescence spectroscopy analysis.