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A series of porous interpenetrating metal–organic frameworks based on fluorescent ligands for nitroaromatic explosive detection

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Abstract

Four porous interpenetrating metal–organic frameworks (MOFs), namely, [Cd2(Tipb)2(btc)Cl]·Gx (1), [Cd(Tipb)(tdc)]·Gx (2), [Cd(Tipb)(fdc)]·Gx (3), and [Cd5(Tipb)4(btc)2Cl2(DMF)2(H2O)5]·Cl2·Gx (4) (G = guest molecules, Tipb = 1,3,5-tris(p-imidazolylphenyl)benzene, btc = benzene-1,3,5-tricarboxylic acid, tdc = thiophene-2,5-dicarboxylic acid, fdc = furan-2,5-dicarboxylic acid, and DMF = N,N′-dimethylformamide) have been assembled from π-electron-rich ligands and cadmium salts. These four MOFs exhibit strong fluorescent emissions upon excitation at room temperature. Due to the presence of π-electron-rich N-donor ligands, the sensing sensitivities of compounds 1–3 towards electron-deficient nitroaromatic explosives such as 2,4,6-trinitrophenol (TNP), 2,4-dinitrotoluene (2,4-DNT), 1,3-dinitrobenzene (1,3-DNB), and nitrobenzene (NB) have been studied by fluorescence quenching experiments. The results indicate that compounds 1–3 are highly sensitive to TNP owing to the electron and energy transfers between MOFs and TNP. Furthermore, compounds 1–3 remain stable after quenching and exhibit good recyclability. Moreover, the adsorption properties of 1–3 have also been investigated.

Graphical abstract: A series of porous interpenetrating metal–organic frameworks based on fluorescent ligands for nitroaromatic explosive detection

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Publication details

The article was received on 08 Feb 2018, accepted on 04 May 2018 and first published on 08 May 2018


Article type: Research Article
DOI: 10.1039/C8QI00123E
Citation: Inorg. Chem. Front., 2018, Advance Article
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    A series of porous interpenetrating metal–organic frameworks based on fluorescent ligands for nitroaromatic explosive detection

    X. Zeng, H. Xu, Y. Xu, X. Li, Z. Nie, S. Gao and D. Xiao, Inorg. Chem. Front., 2018, Advance Article , DOI: 10.1039/C8QI00123E

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