Hydrogen-Bond-Connected 2D Zn-LMOF with Fluorescent Sensing for Inorganic Pollutants and Nitro Aromatic Explosives in the Aqueous Phase.

Herein, a novel luminescent Zn-LMOF, ([Zn(PBBA)(HO)]·3DMF·2HO, PBBA = 4,4'-(2,6-pyrazinediyl)bis[benzoic acid], DMF = ,-dimethylformamide), was successfully synthesized under solvothermal conditions. Zinc ions are connected by PBBA ligands to form two-dimensional (2D) layers, and the layers are further propped up through hydrogen-bonding interactions. exhibits good sensitivity to inorganic pollutants, Fe and CrO, as well as nitro aromatic explosives, 2,4,6-trinitrophenol and 2,4-dinitrophenol. exhibits high (at 10 M level) and low limit of detection values (∼10 mol/L) for the abovementioned hazardous pollutants, which is better than a majority of previously reported MOF-based fluorescent sensors. With good stability in the aqueous phase, can serve as a promising chemical sensor for pollutant detection in wastewater.