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. 2020 Jan 8;10(3):1439-1446.
doi: 10.1039/c9ra08733h. eCollection 2020 Jan 7.

Aqueous-phase detection of antibiotics and nitroaromatic explosives by an alkali-resistant Zn-MOF directed by an ionic liquid

Jian-Hua Qin  1 , Ya-Dan Huang  1   2 , Ming-Yu Shi  1 , Hua-Rui Wang  1 , Min-Le Han  1 , Xiao-Gang Yang  1 , Fei-Fei Li  2 , Lu-Fang Ma  1   3
Affiliations

Aqueous-phase detection of antibiotics and nitroaromatic explosives by an alkali-resistant Zn-MOF directed by an ionic liquid

Jian-Hua Qin et al. RSC Adv. .

Abstract

An alkali-resistant Zn-MOF directed by [BMI]Br ionic liquid, (BMI)2[Zn3(ptptc)2] (1), based on a π-electron-rich terphenyl-tetracarboxylic acid, has been synthesized under the combination of hydro/solvothermal and ionothermal condition (BMI = 1-butyl-3-methylimidazolium, H4ptptc = p-terphenyl-3,3'',5,5''-tetracarboxylic acid). In 1, the trinuclear Zn(ii) clusters are linked by the organic moieties of the ptptc ligands, resulting in a 3D anionic framework structure with highly disordered [BMI]+ cations filled in the pores. 1 exhibits good chemical stability in water and NaOH solutions (pH range of 7-12), which allow it to detect antibiotics and nitroaromatic explosives in an aquatic system. 1 represents high fluorescence quenching efficiency toward NFs (furazolidone, FZD; nitrofurazone, NZF; nitrofurantoin, NFT), NMs (ronidazole, RDZ; metronidazole, MDZ; dimetridazole, DTZ; ornidazole, ODZ) and nitrophenol (2-nitrophenol, 2-NP; 3-nitrophenol, 3-NP; 4-nitrophenol, 4-NP; 2,4,6-trinitrophenol, TNP) in water solution, respectively.

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Conflict of interest statement

There are no conflicts to declare.

Figures

Scheme 1
Scheme 1. The synthetic routes for Zn-MOFs based on H4ptptc.
Fig. 1
Fig. 1. (a) Representation of the Zn(ii) coordination environments in 1. Symmetry codes (A) 1 + X, +Y, +Z; (B) 1 + X, 1 + Y, +Z; (C)−1 + X, +Y, +Z; (D) −1 + X, −1 + Y, +Z; (E) −X, 1 − Y, −Z; (F) 1 − X, 1 − Y, −Z; (G) 1 − X, 2 − Y, −Z; (H) +X, −1 + Y, +Z; (I) 1 − X, 2 − Y, 1 − Z. (b) View of 3D coordination framework of 1.
Fig. 2
Fig. 2. PXRD patterns for simulated and experimental 1 sample soaked in aqueous solutions over the pH range from 7 to 12.
Fig. 3
Fig. 3. The emission spectra for 1 dispersed in 0.1 mM aqueous solutions of the selected antibiotics (a) and 1 mM aqueous solutions of the selected nitroaromatics explosives (d). Quenching efficiency of the fluorescent intensity for 1 dispersed in 0.1 mM aqueous solutions of the selected antibiotics (b) and 1 mM aqueous solutions of the selected nitroaromatics explosives (e). Quenching efficiencies of 1 dispersed in aqueous solutions at different concentrations of the selected antibiotics (c) and nitroaromatics explosives (f).
Fig. 4
Fig. 4. HOMO and LUMO energy levels for the selected antibiotics (a) and nitroaromatics explosives (b).
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