SEARCH Articles Figures Tables 1 -Butyl-3-methylimidazolium 1- -3-methylimidazolium tetrafluoroborate 1- Butyl-3-methylimidazolium tetrafluoroborate Ionic liquid , l-Butyl-3-methylimidazolium tetrafluoroborate L tetrafluoroborate L- -3-methylimidazolium L-Butyl-5- L-butyl-3-methylimidazolium Methylimidazolium