Fluorescence sensing of nitrophenol explosives using a two-dimensional organic-metal chalcogenide fully covered with functional groups.

A new 2D fluorescent organic-metal chalcogenide (OMC), CdClHT (HT = 4-hydroxythiophenol), evenly covered with phenol groups is reported. CdClHT represents unparalleled selectivity and the highest sensitivity towards 2,4,6-trinitrophenol (TNP) (KSV = 2.16 × 107 m-1, experimental LOD = 2 nM), among all reported 2D conjugated polymer (CP) luminescent detectors.