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The synthesis, characterization and sensing features of a novel probe  1  for the selective chromogenic recognition of diisopropylfluorophosphate (DFP), a sarin and soman mimic, in 99:1 ( v / v ) water/acetonitrile and in the gas phase is reported. Colour modulation is based on the combined reaction of phosphorylation of  1  and fluoride‐induced hydrolysis of a silyl ether moiety. As fluoride is a specific reaction product of the reaction between DFP and the −OH group, the probe shows a selective colour modulation in the presence of this chemical. Other nerve agent simulants, certain anions, oxidant species and other organophosphorous compounds were unable to induce colour changes in  1 . This is one of the very few examples of a selective detection, in solution and in the gas phase, of a sarin and soman simulant versus other reactive derivatives such as the tabun mimic diethylcyanophosphate (DCNP).

A Chromogenic Probe for the Selective Recognition of Sarin and Soman Mimic DFP