A Eu‐Doped Y‐Based Luminescent Metal–Organic Framework as a Highly Efficient Sensor for Nitroaromatic Explosives

摘要: By an isomorphous substitution strategy, a three-dimensional metal–organic framework (MOF), [Y1.8Eu0.2(PDA)3(H2O)1]·2H2O (1; PDA = 1,4-phenylenediacetate), has been synthesized by solvent-assisted liquid grinding and direct heating. Dehydrated 1 (1′) shows strong red photoluminescence through the antenna effect upon excitation at 240 nm. The emissive property was used for visual detection of nitroaromatic explosives in acetonitrile luminescence quenching. Importantly, 1′ exhibited high sensitivity towards sensing 2,4,6-trinitrophenol (TNP), 1,3-dinitrobenzene (DNB), 2,4-dinitrotoluene (DNT), 4-nitrotoluene (NT), nitrobenzene (NB) very low concentrations (0 to 20 μM). estimated KSV (quenching constant based on linear Stern–Volmer plots) values are range 15.9 × 104–1.1 × 104 M–1, which amongst highest known nitroaromatic-sensing materials. For 1′, TNP down 23 ppb achieved.