Luminescent metal–organic frameworks (LMOFs) are a potential class of functional materials for the photoluminescent detection of a wide range of analytes as well as for the detection of pollutants in wastewater. Herein, by using the pillar-layered strategy, two new luminescence Zn-LMOFs (JLU-MOF222 and JLU-MOF223) were successfully solvothermal synthesized. The 2D layers are both consisting of Zn²⁺ and TPHC [TPHC = (1,1′:2′,1″-terphenyl)-3,3″,4,4′,4″,5′-hexacarboxylic acid] ligands and then pillared by the different N-donor ligands to form the 3D Zn-LMOFs with fsh topology. Benefiting from the uncoordinated carboxylate sites, uncoordinated N atom, or -NH₂ group in the pillaring ligands and excellent stability in pH = 2–13 aqueous phase, JLU-MOF222 and JLU-MOF223 not only can sensitively detect trace amounts of inorganic pollutants (Fe³⁺, Cr₂O₇^2–) and nitro aromatic compounds TNP and 2,4-DNP (TNP = 2,4,6- trinitrophenol, 2,4-DNP = 2,4-dinitrophenol) through luminescence quenching but also exhibit high selectivity of other anti-interference competing analytes. The two new Zn-LMOFs can be used as potential luminescent sensors for pollutant detection in water due to their high K_SV and low limit of detection (LOD).

中文翻译：

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两种稳定的柱层状 Zn-LMOF 用于水中无机污染物和硝基芳香族化合物的高荧光传感


发光金属有机框架（LMOF）是一类潜在的功能材料，可用于多种分析物的光致发光检测以及废水中污染物的检测。在此，通过采用柱层状策略，成功溶剂热合成了两种新型发光Zn-LMOF（ JLU-MOF222和JLU-MOF223 ）。二维层均由 Zn ²⁺和 TPHC [TPHC = (1,1':2',1"-三联苯)-3,3",4,4',4",5'-六羧酸]配体组成然后由不同的 N 供体配体支撑形成具有fsh拓扑的 3D Zn-LMOF。得益于支柱配体中的不配位羧酸酯位点、不配位N原子或-NH ₂基团以及在pH = 2–13水相中优异的稳定性， JLU-MOF222和JLU-MOF223不仅可以灵敏地检测痕量无机污染物（ Fe ³⁺ 、Cr ₂ O ₇ ^2– ) 和硝基芳香族化合物 TNP 和 2,4-DNP (TNP = 2,4,6- 三硝基苯酚，2,4-DNP = 2,4-二硝基苯酚) 通过发光猝灭，而且还对其他抗干扰竞争分析物表现出高选择性。这两种新型 Zn-LMOF 具有高K _SV和低检测限 (LOD)，可用作潜在的发光传感器，用于水中污染物检测。