Magnetic ionic liquid

From Wikipedia, the free encyclopedia
Jump to: navigation, search

The ionic liquid 1-butyl-3-methylimidazolium tetrachloroferrate was identified by Satoshi Hayashi and Hiro-o Hamaguchi of the University of Tokyo in 2004 as magnetic ionic liquid. It can be obtained from 1-butyl-3-methylimidazolium chloride and ferric chloride. It has quite low water solubility an thus can be considered as hydrophobic ionic liquid.[1][2]

Due to the presence of high spin FeCl4, the liquid is paramagnetic and a magnetic susceptibility of 40.6 × 10−6 emu g−1 is reported. A simple magnet suffices to attract the liquid in a test tube.


  1. ^ Satoshi Hayashi; Hiro-o Hamaguchi (2004). "Discovery of a Magnetic Ionic Liquid [bmim]FeCl4". Chemistry Letters. 33 (18): 1590–1591. doi:10.1002/chin.200518200. 
  2. ^ Satoshi Hayashi; Satyen Saha; Hiro-o Hamaguchi (2006). "A new class of magnetic fluids: bmim[FeCl4] and nbmim[FeCl4] ionic liquids D". IEEE Transactions on Magnetics. 42 (1): 12–14. Bibcode:2006ITM....42...12H. doi:10.1109/TMAG.2005.854875.