NUKLEONIKA 2005, 50(Supplement 2):S35-S38

FORMATION OF Br2·-, BrSCN·- AND (SCN)2·- INTERMADIATES IN THE IONIC LIQUID METHYLTRIBUTYLAMMONIUM BIS[(TRIFLUOROMETHYL)SULFONYL]IMIDE. PULSE RADIOLYSIS STUDY

Jan Grodkowski, Małgorzata Nyga, Jacek Mirkowski

Department of Radiation Chemistry and Technology, Institute of Nuclear Chemistry and Technology, 16 Dorodna Str., 03-195 Warsaw, Poland

The reactions of Br2·– anion radicals with thiocyanate anions in the ionic liquid methyltributylammonium bis[(trifluoromethyl)sulfonyl]imide (R4NNTf2) were studied by pulse radiolysis. Reaction of solvated electrons with BrCH2CH2Br (DBE), k = (1-2) ´ 108 L mol-1 s-1, leads to the production of Br2·– anion radicals. The intermediate absorption spectra following pulse radiolysis of DBE/SCN–/Br–/ solutions in R4NNTf2 correspond to Br2·–, BrSCN· and (SCN)2·– anion radicals. The participation of these radicals in the spectra changes with progressing reactions and depends on the concentration Br– and SCN– in the solution.