Search

A new two-fold interpenetrated zinc based metal–organic framework with dia topology has been isolated under hydrothermal conditions. Obtained complex can be used as a sensing material for the selective detection of nitro-aromatic compounds, especially for 4-nitroaniline that with high quenching constant and a low limit of detection. [Display omitted] • This study reports the successful assembly of a zinc-based MOF with a two-fold interpenetrating diamond-like 3D network. • This MOF demonstrates the ability to selectively detect NACs, particularly 4-NA with high quenching constant and sensitivity. • The sensing mechanism involves RET between NACs and MOF, while PET also contributes to the detection of 4-NA, 2-NP, and 4-NP. A zinc based metal-organic framework (MOF), namely, {Zn(L)·2H 2 O} n (1) {H 2 L = 4-(3,5-dicarboxyphenyl)-4,2′:6′,4′'-terpyridine}, has been successfully assembled in a hydrothermal environment. The single-crystal X-ray diffraction demonstrate that the structure of complex 1 features a two-fold interpenetrating diamond-like 3D network with four-connected dia topology. Luminescent sensing research shows that 1 can selectively detect nitro-aromatic compounds (NACs), especially for 4-nitroaniline (4-NA) that with high quenching constant (K SV = 1.66 × 104 M−1) and low limit of detection (LOD: 36.97 μM). The sensing mechanism of NACs by 1 may come from the resonance energy transfer (RET) between substrate and sensor; however, for 4-NA, 2-NP, and 4-NP, photo-induced electron transfer (PET) also exists. Importantly, after five cycles detection test the sensing capability of 1 does not exhibit significant decrease confirms that 1 possesses high stability and good recyclability. [ABSTRACT FROM AUTHOR]

[Display omitted] • Most recent advancements pertaining to the detection, conversion, and depletion of nitroaromatic pollutants using MOFs are deliberated. • The synthesis of MOFs from a greener perspective is highlighted to meet sustainability objectives. • Green-synthesized MOFs are promising catalysts for the detection and removal of pollutants. • The catalytic efficiency of NMOFs-based catalysts and their hybrids with metals has been discussed, highlighting the design and synthesis criteria. As major threats to the environment, nitroaromatics have been found in large quantities in the effluents from various chemical industries as consequence of global industrialization. Therefore, their rapid detection and catalytic transformation to safer entities has garnered immense attention. Metal-organic frameworks (MOFs) are highly porous crystalline networks resulting from coordination polymerization and comprise metal ions/clusters and organic ligands in one-, two- and three-dimensional structures; they can be applied in the detection, catalytic conversion, and depletion of nitroaromatics. In this context, the focus has lately shifted towards the synthesis of greener nano-MOFs (NMOFs) in aqueous media based on heterogeneous catalytic reactions to attain sustainable structures for nitroaromatics depletion. Herein, the most recent developments pertaining to the detection, conversion, and depletion of nitroaromatic pollutants using MOFs are deliberated. The synthesis of MOFs from a greener perspective is highlighted to meet sustainability objectives. The structural manipulation of greener NMOFs, via an array of transition metals and organic linkers coordinated in a network are underscored with hydrophobic or hydrophilic attributes and the ability of esterification and static quenching to enhance their efficiency for adsorption of pollutants. Major challenges associated with the sustainable and greener synthesis of NMOFs for the remediation of nitroaromatics are covered. [ABSTRACT FROM AUTHOR]