Because of serious environmental pollutions, the detection of hazardous and explosive nitro-aromatic compounds using metal−organic frameworks (MOFs) has been a promising research field in the current scenario. Here, we report a new fluorescent MOF, [Zn 2 (TCPE)(tta) 2 ]•2DMF•4H 2 O•2Me 2 NH 2 + (HNU-34, H 4 TCPE = 1,1,2,2-tetra(4-carboxylphenyl)ethylene, 1H-tta = 1H-tetrazole), which possesses a three-dimensional configuration and one-dimensional channels along the c-axis. It can serve as a luminescence sensor for the detection of nitrophenol explosives through different quenching effects, especially for mononitrophenol and dinitrophenol. The detection limits of 2,6-dinitrophenol and trinitrophenol are 29.45 and 36.15 nM, respectively, which are among the high level of the reported MOF sensors, especially for dinitrophenol.

A new fluorescent supramolecular organic framework (HNU-35) has been constructed, which is a threedimensional structure composed of hydrogen bonding interactions between the carboxyl groups of adjacent 1,1,2,2-tetrakis(4carboxyphenyl)ethylene (H 4 TCPE). HNU-35 exhibits good acid−base stability and can be stable in the pH range of 1−11. Because of its good stability and luminescence emission in water, the anionic detections of HNU-35 are evaluated. All results show HNU-35 is a highly selective luminescent sensing material for the detection of Cr(VI) and Mn(VII) in aqueous solution, and the detection limits of Cr 2 O 7 2− , CrO 4 2− , and MnO 4 − are 26.46 nM, 20.91 nM, and 13.56 nM. HNU-35 also shows good detection effect in the water samples of the lake and sea, which indicate HNU-35 can serve as a potential sensor for Cr(VI) and Mn(VII) detection.