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Issue 24, 2018
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3D water-stable europium metal organic frameworks as a multi-responsive luminescent sensor for high-efficiency detection of Cr2O72−, MnO4, Cr3+ ions and SDBS in aqueous solution

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Abstract

A microporous europium metal–organic framework (Eu-MOF), namely, {[Eu3(bpydb)3(HCOO)(OH)2(DMF)]·3DMF·2H2O}n (1) with asymmetric trinuclear metal clusters extended by 4,4′-(4,4′-bipyridine-2,6-diyl) dibenzoic acid has been synthesized via the solvothermal method. PXRD of 1 confirms that it possesses excellent water stability and pH stability. The photo-luminescence properties of 1 exhibit effective recognition of Cr2O72−, MnO4, and Cr3+ ions and SDBS. Furthermore, a wide linear range, high quenching constant and a low detection limit reveal that 1 can potentially act as a luminescence-based sensor for quantitative and highly sensitive detection of Cr2O72−, MnO4, and Cr3+ ions as well as SDBS in aqueous solutions. To the best of our knowledge, the detection limit of 1 is the lowest value reported for Ln-MOF-based luminescent sensors to detect Cr2O72− ions (0.5 μM) in aqueous solutions. The use of a rare earth fluorescent probe for detecting MnO4 ions is not common. It is the first time that Ln-MOF as a fluorescence probe is used for detecting SDBS. Moreover, fluorescent-based test papers of 1 have also been prepared, which can be helpful to develop visual detection for Cr2O72−, MnO4, and Cr3+ ions as well as SDBS in daily applications.

Graphical abstract: 3D water-stable europium metal organic frameworks as a multi-responsive luminescent sensor for high-efficiency detection of Cr2O72−, MnO4−, Cr3+ ions and SDBS in aqueous solution

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Publication details

The article was received on 30 Sep 2018, accepted on 06 Nov 2018 and first published on 07 Nov 2018


Article type: Paper
DOI: 10.1039/C8NJ04956D
Citation: New J. Chem., 2018,42, 20137-20143

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    3D water-stable europium metal organic frameworks as a multi-responsive luminescent sensor for high-efficiency detection of Cr2O72−, MnO4, Cr3+ ions and SDBS in aqueous solution

    S. Yang, Y. Yuan, P. Sun, T. Lin, C. Zhang and Q. Wang, New J. Chem., 2018, 42, 20137
    DOI: 10.1039/C8NJ04956D

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