Stable Two-Fold Interpenetrated Cd(II)-MOF for Selective Dye Adsorption and Luminescence Detection of Hydroxyl-Substituted Nitroaromatic Compounds

An anionic Cd(II) metal–organic framework, {[NH2(CH3)2]2[Cd(μ4-TDBAT)]·3H2O·DMF}n (1) (TDBAT: 5,5′-((thiophene-2,5-dicarbonyl)bis(azanediyl))diisophthalate), was synthesized with thiophenamide-containing tetracarboxylic acid and characterized by elemental analysis, IR spectroscopy, single-crystal diffraction, powder X-ray thermogravimetric analysis. results showed that each ion connected to four TDBAT4– form a 3D the charge balance of framework kept dimethylamine cations. The interpenetrated other + → framework. Due luminescence property 1, dye adsorption behavior toward cationic methylene blue (MB) sensing nitroaromatic compounds (NACs) were evaluated. compound adsorbed high amount (1004.12 mg g–1) MB could separate from MB/MO mixture. Moreover, displayed detections for hydroxyl-substituted NACs (4-nitrophenol, 2,4-dinitrophenol 2,4,6-trinitrophenol) detection limits 8.14, 11.85, 5.7 ppm, respectively, in presence interfering compounds. ability 1 assigned predominantly electrostatic interaction exchange. possible mechanism be attributed competitive light absorption hydrogen bonding interactions. reusability NACs.