Volume 39, Issue 1 pp. 99-105
Concise Report

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

Xinli Gao

Xinli Gao

Instrumental Analysis Center, Taiyuan University of Science and Technology, Taiyuan, Shanxi, 030024 China

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Lei Pei

Lei Pei

College of Chemical and Biological Engineering, Taiyuan University of Science and Technology, Taiyuan, Shanxi, 030024 China

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Wenjuan Xue

Wenjuan Xue

State Key Laboratory of Separation Membranes and Membrane Processes, School of Chemistry and Chemical Engineering, Tiangong University, Tianjin, 300387 China

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Hongliang Huang

Corresponding Author

Hongliang Huang

State Key Laboratory of Separation Membranes and Membrane Processes, School of Chemistry and Chemical Engineering, Tiangong University, Tianjin, 300387 China

E-mail: [email protected] (X. Zhao); [email protected] (H. Huang)Search for more papers by this author
Zhuqing Gao

Zhuqing Gao

College of Chemical and Biological Engineering, Taiyuan University of Science and Technology, Taiyuan, Shanxi, 030024 China

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Xudong Zhao

Corresponding Author

Xudong Zhao

College of Chemical and Biological Engineering, Taiyuan University of Science and Technology, Taiyuan, Shanxi, 030024 China

E-mail: [email protected] (X. Zhao); [email protected] (H. Huang)Search for more papers by this author
First published: 28 August 2020
Citations: 27

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 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 combination of experimental analysis and density functional theory (DFT) calculations demonstrates that the high selectivity, high sensitivity 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.

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