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Issue 5, 2019
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A water-stable EuIII-based MOF as a dual-emission luminescent sensor for discriminative detection of nitroaromatic pollutants

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Abstract

A water-stable EuIII-based metal–organic framework (MOF) with dual-emission luminescence behavior, namely {[Eu4(INO)53-OH)2Cl4(H2O)]·(NO3)·(H2O)5}n (Eu-MOF; HINO = isonicotinic acid N-oxide), was successfully constructed by the solvothermal reaction of Eu3+ ions with the organic ligand HINO. The cationic 3D framework contains microporous channels with accessible Lewis-base sites and NO3 ions as balanced anions, which all contribute to the selective detection of multifarious analytes. This MOF shows ratiometric detection of acetone, Cr2O72− ions, and nitroaromatic compounds (NACs). In particular, it shows great recognition of four NACs in water, representing the first LnIII-MOF which can display distinguishing fluorescence phenomena on NACs rather than relying on the quenching effect. Furthermore, this is also the first example of a MOF-sensor for detecting these explosives discriminatively by ratiometric methods. Additionally, the mechanisms for luminescent responses towards different analytes have been discussed in detail.

Graphical abstract: A water-stable EuIII-based MOF as a dual-emission luminescent sensor for discriminative detection of nitroaromatic pollutants

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Publication details

The article was received on 05 Nov 2018, accepted on 17 Dec 2018 and first published on 18 Dec 2018


Article type: Paper
DOI: 10.1039/C8DT04397C
Citation: Dalton Trans., 2019,48, 1843-1849

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    A water-stable EuIII-based MOF as a dual-emission luminescent sensor for discriminative detection of nitroaromatic pollutants

    X. Zhang, F. Su, D. Chen, Y. Peng, W. Guo, C. Liu and M. Du, Dalton Trans., 2019, 48, 1843
    DOI: 10.1039/C8DT04397C

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