摘要
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.
Photoinduced chemical reactions of 1-butyl-3-methylimidazolium hexafluorophosphate （[bmim][PF6]） 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]^＋＊ to β-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][PF6] with hydrated electron （eaq^-） was confirmed by laser photolysis in aqueous solution.
基金
Supported by National Natural Science Foundation of China(20573130,20673137)
