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Issue 4, 2019
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A tripodal supramolecular sensor to successively detect picric acid and CN through guest competitive controlled AIE

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Abstract

Efficient detection of explosives (e.g. picric acid) and toxic compounds (e.g. cyanide) is an important task. Herein, we report a simple and efficient method for the selective and sensitive detection of picric acid (PA) and CNvia a novel guest competitive controlled aggregation-induced emission (AIE) method. First, a tripodal host compound (TG) based on a tris-naphthalimide derivative was designed and synthesized. The TG can self-assemble to a supramolecular system and show blue AIE. Then, we employed the TG-based supramolecular system as a novel supramolecular sensor (S-TG). Interestingly, S-TG could selectively detect PA through a competitive binding interaction, and the detection limit (LOD) of S-TG for PA is 1.19 × 10−8 M. In this process, the self-assembly of S-TG was destroyed and a TG and PA complex (TG–PA) was produced, meanwhile, the AIE of S-TG was quenched. More interestingly, TG–PA could act as a novel supramolecular sensor for the AIE fluorescent ‘turn-on’ detection of CN, and the LOD of TG–PA for CN is 7.45 × 10−7 M. Moreover, PA and CN test kits were prepared by loading S-TG or TG–PA on silica gel plates. These test kits could conveniently and efficiently detect PA or CN with high selectivity and sensitivity.

Graphical abstract: A tripodal supramolecular sensor to successively detect picric acid and CN− through guest competitive controlled AIE

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Publication details

The article was received on 17 Jul 2018, accepted on 05 Dec 2018 and first published on 10 Jan 2019


Article type: Paper
DOI: 10.1039/C8NJ03568G
Citation: New J. Chem., 2019,43, 2030-2036
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    A tripodal supramolecular sensor to successively detect picric acid and CN through guest competitive controlled AIE

    Q. Lin, X. Guan, Y. Fan, J. Wang, L. Liu, J. Liu, H. Yao, Y. Zhang and T. Wei, New J. Chem., 2019, 43, 2030
    DOI: 10.1039/C8NJ03568G

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