A 2D bilayered metal–organic framework as a fluorescent sensor for highly selective sensing of nitro explosives

Abstract

A novel 2D bilayered Cd-MOF to detect nitrobenzene (NB) and 2,4,6-trinitrophenol (TNP) has been reported. The results reveal that 1 can be applied as a fluorescent sensor for the detection of TNP with high sensitivity, selectivity, and recyclability.

Abstract

A novel Cd-MOF (metal organic framework) [Cd ₃(NTB) ₂(DMA) ₃]·2DMA (H ₃NTB = 4,4′,4′′-nitrilotrisbenzoic acid; DMA = N, N-dimethylacetamide) ( 1) was obtained under solvothermal conditions. The resulting MOF exhibits a novel (2D→3D) interdigitated architecture that is obtained from a bilayered motif with hexagonal grids. Luminescence properties of the activated phase of 1a well dispersed in different solvents have also been investigated systematically, which demonstrate distinct solvent-dependent luminescence spectra with emission intensities significantly quenched toward nitrobenzene (NB) and 2,4,6-trinitrophenol (TNP). The results reveal that 1 can be applied as a fluorescent sensor for the detection of TNP with high sensitivity, selectivity, and recyclability.