Highly selective and rapidly responsive fluorescent probe for hydrogen sulfide detection in wine.

A new fluorescent probe 6-(2, 4-dinitrophenoxy)-2-naphthonitrile (probe 1) was designed and synthesized for the selective detection of hydrogen sulfide (HS). The addition of HS to a solution of probe 1 resulted in a marked fluorescence turn-on alongside a visual color change from colorless to light yellow. Importantly, this distinct color response indicated that probe 1 could be used as a visual sensor for HS. Moreover, probe 1 was successfully used as a signal tool to determine the HS levels in beer and red wine.