Room temperature ionic liquids with two symmetric ions

Abstract

Room temperature ionic liquids typically contain asymmetric organic cations. The asymmetry is thought to enhance disorder, thereby providing an entropic counter-balance to the strong, enthalpic, ionic interactions, and leading, therefore,...

Effect of Relative Mass on Ion Velocity Cross-Correlations in Ionic Liquids and Molten Salts: Different Perspectives in Different Reference Frames

“…Symbols: solid, ammonium salts; open, phosphonium salts; black, cation–anion; blue, cation–cation; red, anion–anion; the lines are simply guides for the eye. Ionic liquids, left to right, with data sources: ammonium, [N (2O1)3,1 ]­[TFA], [N 4441 ]­[TFA], [N (2O1)3,1 ]­[FSI], [N 4441 ]­[FSI], [N (2O1)3,1 ]­[TSAC], [N 4441 ]­[TSAC], [N (2O1)3,1 ]­[Tf 2 N], [N 4441 ]­[Tf 2 N], [N 122,2O1 ]­[Tf 2 N], , [N 112,2O2O1 ]­[Tf 2 N], [N 1127 ]­[Tf 2 N], [N 112,2OCO1 ]­[Tf 2 N], [N (2O1)3,1 ]­[BETI], [N 4441 ]­[BETI], [N 1125 ]­[Tf 2 N], [C 2 TMEDA]­[Tf 2 N], [C 2 dmppz]­[Tf 2 N], [chol]­[Tf 2 N]; phosphonium: [P (3O1)4 ]­BF 4 , [P (3O1)4 ]­PF 6 , [P 5555 ]­PF 6 , [P (3O1)4 ]­[Tf 2 N], [P 5555 ]­[Tf 2 N], [P 222,8 ]­[Tf 2 N] 20 and [P 222,5 ]­[Tf 2 N] . The ion names corresponding to the abbreviated forms used here are given in Table S6 of the Supporting Information.…”

“…As we have determined DDC for many ionic liquids with various cations and anions, − including the three [BMIM] + -containing IL, and a number at high pressure, it is possible to use these to examine the conclusions of Ahmed et al in some detail. To extend the range of systems, we include DDC calculated from the transport properties measured by the Rauber group for certain ammonium and phosphonium ion-based ILs, our previously published DDC for certain high temperature molten salts, , and some protic ionic liquids based on the 1,8-diazabicyclo[5.4.0]­undec-7-ene cation ([DBUH] + ). − …”

Stable diesel microemulsion using diammonium ionic liquids and their effects on fuel properties, particle size characteristics and combustion calculations

“…In recent years, using ionic liquids (ILs) as surfactants have been studied, as their properties may be modified by changing their cation or anion type 23 , 24 . ILs are low-temperature molten salts that are fully constituted of anions and cations near room temperature 25 . Wilkes and Zaworotko 26 produced 1-ethyl-3-methylimidazolium tetrafluoroborates in the 1990s, and it was stable in both air and water.…”

Physicochemical Properties of Pyrrolidinium-based Room Temperature Ionic Liquids with Propoxyethyl, Ethoxypropyl, or (Methoxymethoxy)ethyl Group

“…[6][7][8] This effect has been reported since the 2000s, and even in recent years, various literature have been published describing the development of new RTILs with ether functional groups and the analysis of their physicochemical properties. [9][10][11][12][13][14][15] Rauber et al reported that the development of RTILs composed of symmetric cation with ether group and symmetric anion. 14 Warrington et al investigated the introduction effect of ether group into piperidinium and morpholinium cations on their physicochemical properties.…”

“…[9][10][11][12][13][14][15] Rauber et al reported that the development of RTILs composed of symmetric cation with ether group and symmetric anion. 14 Warrington et al investigated the introduction effect of ether group into piperidinium and morpholinium cations on their physicochemical properties. 15 Understanding the structure-physicochemical properties correlation and properties as an electrolyte of ether-functionalized RTILs is quite important for the creation of the next generation of RTILs.…”