摘要

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 d(10)-metal Zn(II) as nodes and luminescent organic ligand 9-phenylcarbazole-3,6-dicarboxylic acid (H(2)PDA) 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 mu g 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, H-1 NMR and molecular force field-based calculations.

  • 出版日期2018-3