Communication: Unusual structure and transport in ionic liquid-hexane mixtures

Abstract

Ionic liquids having a sufficiently amphiphilic cation can dissolve large volume fractions of alkanes, leading to mixtures with intriguing properties on molecular length scales. The trihexyl(tetradecyl)phosphonium cation paired with the bis(trifluoromethylsulfonyl)amide anion provides an ionic liquid that can dissolve large mole fractions of hexane. We present experimental results on mixtures of n-C 6 D 14 with this ionic liquid. High-energy X-ray scattering studies reveal a persistence of the characteristic features of ionic liquid structure even for 80% dilution with n-C 6 D 14 . Nuclear magnetic resonance self-diffusion results reveal decidedly non-hydrodynamic behavior where the self-diffusion of the neutral, non-polar n-C 6 D 14 is on average a factor of 21 times faster than for the cation. Exploitation of the unique structural and transport properties of these mixtures may lead to new opportunities for designer solvents for enhanced chemical reactivity and interface science. C 2015 AIP Publishing LLC. [http://dx

Microscopic Structural and Dynamic Features in Triphilic Room Temperature Ionic Liquids

“…Additional details of our NMR diffusion protocols have been described previously (Liang et al, 2015; Wu et al, 2015, 2018).…”

Communication: Nanoscale structure of tetradecyltrihexylphosphonium based ionic liquids

“…72,87,90,113,116,117,122 In particular, Gontrani et al studied the tetradecyltrihexylphosphonium chloride IL using X-ray scattering and molecular dynamics simulations (MD) and observed the existence of nanoscale segregation. 72 As we discuss below, polar-apolar alternation giving rise to such segregation can be a) Electronic mail: hkashyap@chemistry.iitd.ac.in b) Electronic mail: claudio-margulis@uiowa.edu linked with what is commonly called a prepeak or first sharp diffraction peak in the X-ray scattering diffraction pattern.…”

Silica-gel Particles Loaded with an Ionic Liquid for Separation of Zr(IV) Prior to Its Determination by ICP-OES

“…Room temperature ionic liquids (RTILs) have been considerably used and there is growing interest in them in different chemistry fields. Organic, inorganic, analytical and electrochemistry are common areas for application of ionic liquids (ILs) [ 1 , 2 ]. In addition, ILs have received significant attention in analytical chemistry as environmentally-friendly solvents, replacing volatile, toxic hazardous and flammable organic compounds [ 3 ].…”