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A hydrolytically stable europium–organic framework for the selective detection of radioactive Th4+ in aqueous solution

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Abstract

Thorium is not only a promising candidate for developing next generation nuclear fuel but also a potential radioactive contaminant. Efficient detection of thorium contamination is critically important in both nuclear science and environmental protection. We present here a 3D luminescent europium organic framework [Eu2(FDC)3(DMA)2]·4H2O (compound 1), which exhibits excellent hydrolytic stability and features highly selective detection capacity (KSV = 6.68 × 104) towards radioactive Th4+ ions among the selected monovalent, divalent and tervalent metal ions in aqueous solution. The detection limit of the material towards Th4+ is 3.49 × 10−5 mol L−1 which is close to the WHO standard. The detection capability and the sensing mechanism were demonstrated by Th4+ uptake kinetics, energy-dispersive spectroscopy mapping, absorption spectroscopy, luminescence lifetime, and competitive adsorption measurements. Compound 1 represents a rare case of a MOF based Th4+ probe.

Graphical abstract: A hydrolytically stable europium–organic framework for the selective detection of radioactive Th4+ in aqueous solution

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Publication details

The article was received on 20 Feb 2019, accepted on 25 Apr 2019 and first published on 26 Apr 2019


Article type: Paper
DOI: 10.1039/C9CE00241C
CrystEngComm, 2019, Advance Article

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    A hydrolytically stable europium–organic framework for the selective detection of radioactive Th4+ in aqueous solution

    L. Song, W. Liu, Y. Wang, L. Chen, X. Wang and S. Wang, CrystEngComm, 2019, Advance Article , DOI: 10.1039/C9CE00241C

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