Polyfluorinated 2,1,3-benzoselenadiazoles: enhanced electron capture ability

Abstract 2,1,3-Benzoselenadiazoles formed in the reaction of Se(IV) derivatives with 1,2-diaminobenzenes present a convenient form of analytical determination of environmental Se at ultra-trace level by electron-capture detector gas chromatography (ECD-GO) [1]. The Table lists the retention time (RT) and the mole sensitivity (MS) of 63 Ni ECD to polyfluorinated selenadiazoles 1–3, measured relatively those of compound 4, the most volatile and possessing one of the smallest detection limit among the compounds studied previously. Compounds 1–4 have the similar volatility, however the MS of ECD to 1–3 exceed that to 4 by more than an order. This makes prospects for creating of analytical reagents with improved characteristics for Se determination by ECD-GC on the basis of polyfluorinated 1 ,2-diaminobenzenes.