A new two-fold interpenetrated Cd(II)-based metal-organic framework as a fluorescent probe for nitro-aromatic compounds
Xiang-Yu Sun, Xiu‐Du Zhang, Zou‐Hong Xu, Yue Zhao, Zhengliang Wang, Wei‐Yin Sun
Abstract
Luminescent metal-organic frameworks (MOFs) have been extensively investigated as sensors for detection of various compounds. In this work, 5,5',5''-((benzene-1,3,5-tricarbonyl)tris(azanediyl))triisophthalic acid (H<sub>6</sub>L) and 1,3,5-tri(1H-imidazol-1-yl)benzene (tib) were reacted with Cd(NO<sub>3</sub>)<sub>2</sub>·4H<sub>2</sub>O under solvothermal conditions to generate a MOF [Cd<sub>3</sub>(H<sub>2</sub>O)<sub>3</sub>(L)(tib)<sub>2</sub>]·5DMA·4H<sub>2</sub>O (<b>1</b>) (DMA = <i>N,N</i>-dimethylacetamide). Single-crystal X-ray diffraction analysis revealed that <b>1</b> is a 2-fold interpenetrated three-dimensional framework composed of Cd-L and Cd-tib two-dimensional networks. Furthermore, its fluorescence and sensing capability towards common organic compounds were explored. The results indicate that <b>1</b> could function as a fluorescent probe for nitro-aromatic compounds, especially for 2,4,6-trinitrophenol (TNP) and 4-nitrophenol (4-NP).