Monodentate AIEgen Anchored on Metal‐Organic Framework for Fast Fluorescence Sensing of Phosphate. Issue 1 (23rd December 2020) - Gao, Xinli
Abstract : 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 HPO4 2– . Experimental results indicate that TPE‐UiO‐66 can selectively sense HPO4 2– 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 combination of experimental analysis and density functional theory (DFT) calculations demonstrates that the high selectivity, high sensitivity and fast response of HPO4 2– detection by TPE‐UiO‐66 can be attributed to the stronger coordination interactions of HPO4 2– 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. Abstract : Present here is the selective sensing of HPO4 2– by using a novel sensor constructed by MOF and monodentate AIEgen molecule.