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

Abstract

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) (K_SV = 2.16 × 10⁷ m⁻¹, experimental LOD = 2 nM), among all reported 2D conjugated polymer (CP) luminescent detectors.