Characterization of a dicationic imidazolium-based ionic liquid as a gas chromatography stationary phase.

Here we report the characteristics of a new synthesized ionic liquid, 1,9-di(N-naphthalen-2-ylimidazolium)nonane bis[(trifluoromethyl)sulfonyl]imide ([C(2NPTim)][(NTf)]), as a stationary phase by inverse gas chromatography. The McReynolds constants demonstrated that the [C(2NPTim)][(NTf)] had an average polarity of 667 and polarity number P.N.