In an attempt to obtain solidified ionic liquids a cholesterol-based gelato
r has been applied to gelation of these liquids. By addition of a small amo
unt of low molecular-weight gelator 1, ionic liquids such as N,N'-dialkyl-s
ubstituted imidazolium ions and N-alkyl pyridinium ions are easily gelated
to give the sufficiently thermostable physical gets.