Laser photolysis of ionic liquid [bmim][PF6]

Photoinduced chemical reactions of 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim][PF_6]) were studied by laser photolysis at a wavelength of 266 nm.Excited triplet state ~3[bmim]~ was observed,radical cation [bmim]~(2 ) and neutral [bmim] radical via photoionization were also formed.Energy transfer from ~3[bmim]~ toβ-carotene was confirmed.Oxidation via one electron transfer from TMPD to ~3[bmim]~ was also observed and the rate constant was determined to be 1.2×10.5 L.mol~(-1).s~(-1).The reaction of [bmim][PF_6] with hydrated electron (e_(aq)) was confirmed by laser photolysis in aqueous solution.