A new physical method was proposed to control the liquid properties of room temperature ionic liquids (RT-ILs) in combination with nanoporous materials; the melting point of ILs confined in nanopores remarkably decreases in proportion to the inverse of the pore size.

The electric conductivities and self-diffusion coefficients in dried and water-saturated 1-butyl-3-methylimidazolium hexafluorophosphate, [BMIM][PF₆], were measured at 25 and 40 °C. Although the presence of water can remarkably induce acceleration of transport properties in the ionic liquid, the ionic dissociation remains almost unchanged.