Solubilities of 1,1′-[1,2-Ethanediylbis(oxy-1,2-ethanediyl)]bis-[3-methyl-1H-imidazolium-1-yl] Dihexafluorophosphate in Water, Methanol, Ethanol, Dimethylformamide, Dimethyl Sulfoxide, and (Acetone + Water) Binary Solvent Mixtures

Abstract

The chemical structure of a new gemini dicationic imidazolium ionic liquid,was established by 1 HNMR. The thermal stability of [C 6 O 2 (mim) 2 ][PF 6 ] 2 was studied with differential scanning calorimetry and thermogravimetric analyses. With the use of the analytical stirred-flask method at atmospheric pressure, the solubilities of [C 6 O 2 (mim) 2 ]-[PF 6 ] 2 in water, methanol, ethanol, dimethylformamide, dimethyl sulfoxide, and (acetone + water) binary solvent mixtures were measured from (283.00 to 323.00) K. The experimental data was correlated with the modified Apelblat equation.

Competitive solvation of the imidazolium cation by water and methanol

“…The imidazolium-based RTILs are excellently soluble in most polar solvents 1,2,11,13,15,17,[20][21][22][23][24][25][26][27][28][29][30][31][32][38][39][40][41][42][43][44] and are relatively cheap to synthesize. Polar molecular co-solvents, such as water, methanol, acetonitrile, acetone, n-butanol, alter physical and chemical properties of the imidazolium-based RTILs drastically.…”

“…Low vapor pressure and toxicity (of certain species), high thermal stability and electrical conductivity, and -most importantly -tunability of structure are the properties, which justify an existing interest to this field in the chemical, physical, and biological communities. 1,17,[19][20][21][22][23][24] Imidazolium-based RTILs have been probably the best studied family thus far. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][25][26][27][28][29][30][31][32][33][34][35][36][37] Both direct physical investigations 2,3,[9][10][11]13,17,18,30 and various sorts of numerical computer simulation 1,16,…”

Solubility of 3,3′-(Oxidi-2,1-ethanediyl)bis[1-methyl-imidazolium] Dihexafluorophosphate in Water, Methanol, Ethanol, Acetone, and Acetonitrile and Binary Mixtures (Water + DMF) from (283.00 to 323.00) K

“…The solubility of [C 4 O­(mim) 2 ]­[PF 6 ] 2 in water, methanol, and ethanol is listed in Table , and those of [C 6 O 2 (mim) 2 ]­[PF 6 ] 2 in water, methanol, and ethanol were shown in our previous work . To understand the solubility data better, they were also depicted as a function of temperature in Figure .…”