A Fluorescent Sensor for Dual-Channel Discrimination between Phosgene and a Nerve-Gas Mimic

The ability to analyze highly toxic chemical warfare agents (CWAs) and related chemicals in a rapid and precise manner is essential in order to alleviate serious threats to humankind and public security caused by unexpected terrorist attacks and industrial accidents. In this investigation, we designed a o‐phenylenediamine‐pyronin linked dye that is capable of both fluorogenic and colorimetric discrimination between phosgene and the prototypical nerve‐agent mimic, diethyl chlorophosphate (DCP) in the solution or gas phase. Moreover, this dye has been used to construct a portable kit that can be employed for real‐time monitoring of DCP and phosgene in the field, both in a discriminatory manner, and in a simple and safe way. Rot‐Grün‐Test: Ein Fluoreszenzsensor zur sicheren und unterscheidbaren Echtzeitüberwachung von Phosgengas und Diethylchlorphosphat (DCP) wurde entwickelt. Der Sensor ist nicht fluoreszierend; bei Reaktion mit Phosgen cyclisiert er zu einem rot emittierenden Molekül, mit DCP entsteht eine grün emittierende Verbindung.