Picric Acid (PA) is directly associated with modern bombs in terrorist attacks or other criminal intents, thus, a simple yet sophisticated bi-signal emission system based on MOFs is one of the breakthroughs to increase the accuracy and sensitivity for PA detection. Herein, ligand-to-metal charge-transfer (LMCT) related emission and the ligand-based emission were formed simultaneously within a novel luminescent MOF with a 2D pore system, which was constructed by choosing d¹⁰-metal Zn(II) as nodes and luminescent organic ligand 9-phenylcarbazole-3,6-dicarboxylic acid (H₂PDA) as linkers. It can serve as the first example of MOFs implicated dual-emitting sensor for visual and selective luminescent sensing of PA. The naked-eye and luminescent detection limitations for PA are 0.45 μg and 25 ppb, respectively, and it could be regenerated by hot ethanol treatment and reused at least for 5 times. The sensing mechanism is also discussed through IR, ¹H NMR and molecular force field-based calculations.

苦味酸（PA）与恐怖袭击或其他犯罪意图中的现代炸弹直接相关，因此，基于MOF的简单而复杂的双信号发射系统是提高PA检测准确性和灵敏度的突破之一。在本文中，通过选择d ^10-金属Zn（II）作为结点，在具有二维孔系统的新型发光MOF中同时形成了配体-金属电荷转移（LMCT）相关的发射和基于配体的发射。和发光有机配体9-苯基咔唑-3,6-二羧酸（H ₂ PDA）作为连接基。它可以作为MOF涉及双发射传感器的第一个示例，用于PA的视觉和选择性发光传感。PA的肉眼和发光检测极限为0.45 分别为μg和25  ppb，可以通过热乙醇处理进行再生，并至少重复使用5次。还通过IR，¹ H NMR和基于分子力场的计算来讨论传感机理。