Monodentate AIEgen Anchored on Metal-Organic Framework for Fast Fluorescence Sensing of Phosphate

• 作者: Xinli Gao Lei Pei Wenjuan Xue Hongliang Huang Zhuqing Gao Xudong Zhao
• 来源期刊: 中国化学（英文版）
• 年，卷（期）: 2021,（1）
• 所属期刊栏目: Concise Reports
• 页码范围: 99-105
• 页数: 7页
• 语种: 英文
• DOI: 10.1002/cjoc.202000364

摘要

Herein,a novel sensor(TPE-UiO-66)was designed via anchoring monodentate tetraphenylethylene(TPE)onto UiO-66 framework.The combination of the distinct aggregation-induced emission(AIE)of TPE and the easy replacement of monodentate linker by guest phosphate,makes TPE-UiO-66 an ideal platform for sensing HPO42-.Experimental results indicate that TPE-UiO-66 can selectively sense HPO42-from other common anions.The limit of detection(LOD)can reach to 5.56 μmol·L-1 and more importantly,TPE-UiO-66 also exhibits an ultra-fast equilibrium response of 2 min,far faster than those of other sensors especially for UiO-66-NH2.The combi-nation of experimental analysis and density functional theory(DFT)calculations demonstrates that the high selectivity,high sensitivi-ty and fast response of HPO42-detection by TPE-UiO-66 can be attributed to the stronger coordination interactions of HPO42-with Zr-O cluster of UiO-66 than that of TPE molecule.This study not only provides a potential probe for phosphate,but also represents a novel strategy to design stimuli-responsive fluorescent MOF-based sensors via using monodentate AIEgens.