Physical properties and nanostructuring of long-chained homobaric imidazolium ionic liquids

Abstract

Understanding the structure-property relationship and nanoscopic behaviour of ionic liquids is of utmost importance for their potential applications. Focusing these studies on sets of homobaric ionic liquids could provide important...

Understanding the effects of targeted modifications on the 1 : 2 Choline And GEranate structure

“…This suggests that the isotropic phase in CAGE is dominated by the long alkyl chains of the acid and anion species and is more similar to the non-polar domain than the polar domain. Short-range polar and non-polar domain segregation is expected to be present, as has been observed in long-chained ionic liquids, 56 but the exchange between environments is fast and undetectable by room-temperature CW-EPR; therefore, the spectrum indicates a radical that experiences an average of both polar and non-polar environments. The only notable difference between the two temperatures is in the correlation time ( τ c = 450 and 65 ps respectively), which results from a reduction in viscosity as the temperature is increased.…”

Unravelling ionic liquid solvent effects for a non-polar Cope rearrangement reaction

“…For [C 8 C 1 im][NTf 2 ] we rationalise that the reduced conversion (compared to [C 4 C 1 im][NTf 2 ]) stems from the presence of nanoscale domains that occur in ‘long chain’ (R = C n H 2 n +1 ) n > 4 imidazolium-based ILs. 18 As discussed above, the reactivity of the substrate is increased in the ionic domains, while in the lipophilic hydrocarbon domains the substrate does not experience beneficial polarization. Overall, these results highlight a consistent increase in reaction rate for the ILs examined, moderated slightly by structural and VdW/dispersion effects due to the individual IL ions.…”

“…ILs with longer alkyl chains form nano-scale polar and lipophilic domains. 17,18 Thus, an IL can have regions that are more polar than could be anticipated from the magnitude of e r . However, ILs with shorter alkyl chains (R = C n H 2n+1 ) n o 4 are generally considered to be homogeneous, and still have a moderate e r .…”

Small-Angle X-ray Scattering Study of the Amphiphilic Bulk Nanostructure of Tetraalkylammonium Deep Eutectic Solvents

“…SAXS characterizes persistent interactions in fluids which can be used to determine the bulk morphology of structured soft matter systems. 49 Thus, the amphiphilic nanostructures of the prepared DESs and the seven pure HBDs that were liquid at 25 °C were investigated using SAXS. The observed scattering patterns for each of the DES are shown in Figure S1 in the Supporting Information and the HBDs are shown in Figure S2.…”

“…These q values were converted into approximate real-space or correlation distances, d , using Bragg’s law (Equation ). An estimate of real-space distance, d , was then obtained using eq below, using the q at the maximum intensity of the peaks . The position of these correlation peaks and the corresponding real-space distance for all DESs and HBDs analyzed are listed in Tables S1 and S2 in the Supporting Information.…”