A selective colorimetric and ratiometric fluorescent probe for hydrogen sulfide

A reaction-based colorimetric and ratiometric fluorescent probe based on an ICT-strategy for selective detection of H2S that exploited the H2S-mediated reduction of nitrocompound to amines was explored. And it displayed high selectivity for H2S over other relevant reactive sulfur, oxygen, nitrogen species and other anions with more than 120 nm blue shift and the change of emission intensity ratio inducted by H2S was over 4750.