Ionic liquids of superior thermal stability

Abstract

In a head-to-head study, ILs based upon tetraarylphosphonium cations exhibit superior long-term thermal stability compared to familiar salts based upon imidazolium, quaternary ammonium, or tetraalkylphosphonium cations.

Effect of ionic liquids on the interaction between liposomes and common wastewater pollutants investigated by capillary electrophoresis

“…Phosphonium ILs have typically better thermal and chemical stabilities compared to other IL classes, thus making them more suitable for many applications [9,10]. However, some phosphonium ILs are strongly hydrophobic due to their long alkyl chains, and may therefore have an even stronger impact on biomembranes.…”

Density and excess molar volume of binary mixture of thiocyanate-based ionic liquids and methanol at temperatures 293.15–323.15K

“…Densities for the binary mixtures of methanol with 1-butyl-3-methylimidazolium thiocyanate ([C 4 C 1 im][SCN]), 1-allyl-3-methylimidazolium thiocyanate [C 1 = C 2 )C 1 im][SCN] and 3-(3-butyl-1H-imidazol-3-ium-1-yl)propanenitrile thiocyanate ([(NC) 2 . This could be that methanol may interact with nitrile functional group in alky spacer in addition to C2-H (cation)⋯O (methanol) complex formation.…”

“…3-(3-Butyl-1H-imidazol-3-ium-1-yl)propanenitrile chloride ([(NC) 2 C 2 C 4 im]Cl) was synthesized using previously reported method [28]. Further, the chloride anion of the aforementioned was exchanged with SCN of NaSCN salt to obtain 3-(3-butyl-1H-imidazol-3-ium-1-yl)propanenitrile thiocyanate [(NC) 2 …”

“…The correlation constants were established using least square method and the standard deviations were estimated using Eq. (2). A linear function is sufficient to account for the density versus temperature dependence for all composition's ranges.…”

“…Their unique and essential properties include low vapor pressure [1], high chemical and thermal stability [2,3] and good dissolution properties for most of organic and inorganic compounds [4]. Moreover, ILs demonstrate the rich and complex behavior as solvents which can be modified by varying the nature of the cations or anions.…”