Abstract
Protic ionic liquids (PILs) were prepared by neutralization of a series of allylamines (allyldimethylamine, allyldiethylamine, and diallylmethylamine) with trifluoromethanesulfonic acid, in order to achieve highly conductive PILs, and their physicochemical properties, including thermal and transport properties, were compared with PILs from a series of propylamines (dimethylpropylamine, diethylpropylamine, and methyldipropylamine). The melting point and ionic conductivity of the allylammonium-based PILs were lower and higher than those of the corresponding propylammonium-based PILs having cations with the same number of carbon atoms, respectively. The origin of the difference in the properties of these two series of PILs was investigated based on the evaluation of the molar concentration, self-diffusion coefficient of the cations and anions, and ionicity. The molar concentration and ionicity of the allylammonium-based PILs were higher than those of the corresponding propylammonium-based PILs, whereas the d...
Published Version
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