Metal Ion-Responsive Gelation in Nicotine Based Ionic Liquid

抄録

We examined the metal ion-responsive gelation of ionic liquid which are synthesized from (S)-nicotine. The nicotine based ionic liquid have low glass transition points, and their viscosities are comparatively low levels as ionic liquids. In case of addition of Cu(II) and Co(II) ions to the ionic liquid, the resulting metal complexes formed gels. The Cu(II)-nicotine based ionic liquid complex showed a swelling property even in the addition of three times the volume of methanol to the Cu(II)-ionic liquid gel, and the Cu(II) ion is easily recovered from the metallogel by the addition of water. Such a metal ion-responsive phase change enable application in various fields including the process of the metal extraction and the organic synthesis using metal catalysts.