Thermophysical Properties of Binary Aliphatic Quaternary Ammonium Ionic Liquids: TMPAFSA_xTFSA_1-x

Abstract

The anionic binary Ionic liquids; TMPAFSA x TFSA 1-x were prepared as mixture of TMPATFSA and TMPAFSA. From the results of DSC analysis, the binary system showed the simple binary eutectic phase diagram and the eutectic point was found at the composition point of x = 0.33. In this system, each anion vibrated independently and showed isomerization equilibria displacement with temperature change. It was suggested that the equilibria displacements affected to the liquid structure and cistrans isomerization of each anion played an important role in the solidification of TMPAFSA x TFSA 1-x .

Thermophysical Properties of Binary Amide Anion-Based Ionic Liquids; TMPAFSA<i>_x</i>TFSA₁₋<i>_x</i>

“…It was reported that TMPAFSA and TMPATFSA exhibit isomerization equilibria displacement depending on temperature, and alter its liquid structure depending on the isomerization equilibria displacement. 15 It was supposed that isomerization equilibria occurred during cooling processes until just before solidification and resulted in polymorphic behavior. We found difficulty to determine the crystal structure due to the polymorphism.…”

“…In the past, authors found that mixture of TMPAFSA and N,N,N-trimethyl-Npropylammonium bis(trifluoromethanesulfonyl)amide (TMPATFSA) showed phase transition at lower temperature than each pure substance, and reported the phase diagram. 15 From the viewpoint of practical applications, mixing several materials is beneficial to design desired performances. 16,17 Although many studies have been investigated focusing on binary or ternary ionic liquid systems these are mainly limited in transport properties, and there are few studies about basic properties overlooking the whole composition.…”

Dependence of Double Layer Capacitance on Pore Diameter of Carbon Coated Porous Si

“…To observing surface morphology of the PSi and carbon coated PSi, we used field emission scanning electron microscopy (FESEM; JEOL Ltd., JSM-6335F). amide ionic liquid was synthesized following the past report (13), and it was used for electrolyte. To infiltration the electrolyte, electrolyte loaded samples were set to under vacuum for overnight.…”