Conductance and FTIR Spectroscopic Study of Tripleion Formation of Tetrabutylphosphonium Methanesulfonate in Methylamine Solution

Tripleion formation of tetrabutylphosphonium methanesulfonate [Bu4PCH3SO3] in methylamine solution has been reported quantitatively by conductometric study, and the observation has evident from the qualitative analysis of FTIR spectroscopy. The ionic liquid exists as tripleion state in low dielectric constant solution (methylamine solution having εr lt;10). Thus, the conductance data have been analysized using the fuosskraus theory of tripleion formation. After that, the results have been discussed in terms of driving forces i.e., Hbond formation, dipoledipole interactions, and structural aspect (functional group) of the ionic liquid and methylamine molecules. Shifting of the stretching frequency of functional group of the solvent in presence and absence of the ionic liquid has been taken into account in FTIR spectroscopic study, and then the solvation consequence has been manifest by the change of the intensity.