1-Butyl-3-methylimidazolium hexafluorophosphate, also known as BMIM-PF6, is a viscous, colourless, hydrophobic and non-water-soluble ionic liquid with a melting point[1] of -8 °C. Together with 1-butyl-3-methylimidazolium tetrafluoroborate, BMIM-BF4, it is one of the most widely studied ionic liquids. It is known to very slowly decompose in the presence of water.[2]

Preparation and uses

BMIM-PF6 is commercially available. It may be obtained in two steps: BMIM-Cl is synthesized by alkylating 1-methylimidazole with 1-chlorobutane. A metathesis reaction with potassium hexafluorophosphate gives the desired compound; the tetrafluoroborate may be prepared by analogously using potassium tetrafluoroborate.[3]


BMIM-PF6 has been investigated in electrochemistry where it serves both as solvent and electrolyte.[4] and electrochemical CO2 reduction.[5]

See also

References

  1. ^ Mihkel Koel (2008). Ionic Liquids in Chemical Analysis. CRC Press. p. xxvii. ISBN 978-1-4200-4646-5.
  2. ^ R.P. Swatloski; J.D. Holbrey & R.D. Rogers (2003). "Ionic liquids are not always green: hydrolysis of 1-butyl-3-methylimidazolium hexafluorophosphate". Green Chem. 5 (4): 361–363. doi:10.1039/b304400a.
  3. ^ Dupont J, Consorti C, Suarez P, de Souza R (2004). "Preparation of 1-Butyl-3-methyl imidazolium-based Room Temperature Ionic Liquids". Organic Syntheses; Collected Volumes, vol. 10, p. 184.
  4. ^ Álvaro Pérez-Salado Kamps, Dirk Tuma, Jianzhong Xia, Gerd Maurer (2003), Solubility of CO2 in the Ionic Liquid [bmim] [PF6], vol. 48, pp. 746–749, doi:10.1021/je034023f{{citation}}: CS1 maint: multiple names: authors list (link)
  5. ^ Yeonji Oh, Xile Hu (2015), Ionic liquids enhance the electrochemical CO2 reduction catalyzed by MoO2, vol. 51, pp. 13698–13701, doi:10.1039/C5CC05263G

Further reading

Allikas: http://en.wikipedia.org/wiki/BMIM-PF6
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