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2012•Journal of South China Normal UniversityRequires access

Synthesis and Characterization of Alkyl Imidazolium-Based Ionic Liquids

Jiang Feiguo

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Abstract

The alkyl imidazolium-based ionic liquids,1-n-butyl-3-methylimidazole methyl carbonate([n-BMIM]OCO2Me) and 1,2-dimethyl-3-ethylimidazole ethyl carbonate(OCO2Et),were synthesized from N-methylimidazole,1,2-dimethylimidazole and carbonates.Reacting with HBF4 and HPF6 at room temperature,[n-BMIM]OCO2Me and OCO2Et were converted into four ionic liquids: 1-n-butyl-3-methylimidazolium tetrafluoroborate([n-BMIM]BF4),1-n-butyl-3-methylimidazolium hexafluorophosphate([n-BMIM]PF6),1,2-dimethyl-3-ethylimidazolium tetrafluoroborate(BF4),and 1,2-dimethyl-3-ethylimidazolium hexafluorophosphate(PF6).The six ionic liquids were characterized and analysed.Environmental pollution was avoided by the green chemical synthetic method in comparison with the traditional two-step synthesis.

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What this paper is about

The alkyl imidazolium-based ionic liquids,1-n-butyl-3-methylimidazole methyl carbonate([n-BMIM]OCO2Me) and 1,2-dimethyl-3-ethylimidazole ethyl carbonate(OCO2Et),were synthesized from N-methylimidazole,1,2-dimethylimidazole and carbonates.Reacting with HBF4 and HPF6 at room temperature,[n-BMIM]OCO2Me and OCO2Et were converted into four ionic liquids: 1-n-butyl-3-methylimidazolium tetrafluoroborate([n-BMIM]BF4),1-n-butyl-3-methylimidazolium hexafluorophosphate([n-BMIM]PF6),1,2-dimethyl-3-ethylimidazolium tetrafluoroborate(BF4),and 1,2-dimethyl-3-ethylimidazolium hexafluorophosphate(PF6).The six ionic liquids were characterized and analysed.Environmental pollution was avoided by the green chemical synthetic method in comparison with the traditional two-step synthesis.

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Available abstract

The alkyl imidazolium-based ionic liquids,1-n-butyl-3-methylimidazole methyl carbonate([n-BMIM]OCO2Me) and 1,2-dimethyl-3-ethylimidazole ethyl carbonate(OCO2Et),were synthesized from N-methylimidazole,1,2-dimethylimidazole and carbonates.Reacting with HBF4 and HPF6 at room temperature,[n-BMIM]OCO2Me and OCO2Et were converted into four ionic liquids: 1-n-butyl-3-methylimidazolium tetrafluoroborate([n-BMIM]BF4),1-n-butyl-3-methylimidazolium hexafluorophosphate([n-BMIM]PF6),1,2-dimethyl-3-ethylimidazolium tetrafluoroborate(BF4),and 1,2-dimethyl-3-ethylimidazolium hexafluorophosphate(PF6).The six ionic liquids were characterized and analysed.Environmental pollution was avoided by the green chemical synthetic method in comparison with the traditional two-step synthesis.

Key concepts: Ionic liquid, Hexafluorophosphate, Tetrafluoroborate, Alkyl, Dimethyl carbonate, Chemistry, Inorganic chemistry, Medicinal chemistry

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