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A series of porous interpenetrating metal-organic frameworks based on fluorescent ligand for nitroaromatic explosives detection

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), [Cd5(Tipb)4(btc)2Cl2(DMF)2(H2O)5]•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, DMF = N,N'-dimethylformamide), have been assembled from π-electron rich ligands and cadmium salt. These four MOFs exhibit strong fluorescent emission upon excitation at room temperature. Due to the presence of π-electron-rich N-donor ligand, the sensing sensitivities of compounds 1–3 to electron deficient nitroaromatic explosives such as 2,4,6-trinitrophenol (TNP), 2,4-dinitrotoluene (2,4-DNT), 1,3-dinitrobenzene (1,3-DNB), 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 transfer between MOFs and TNP. Furthermore, compounds 1–3 remain stable after quenching and exhibit fine recyclability. Besides, the adsorption properties of 1–3 have also been investigated.

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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, Accepted Manuscript
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    A series of porous interpenetrating metal-organic frameworks based on fluorescent ligand for nitroaromatic explosives detection

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

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