How ionic are room-temperature ionic liquids? An indicator of the physicochemical properties

Article Abstract:

The quantitative information on the formation on ionic aggregates in room-temperature Ionic Liquids (RTILs) based on the ratios of molar conductivity values ([A.sub.imp]/[A.sub.NMR], where [A.sub.imp] is the molar conductivity obtained by electrochemical impedance measurements and [A.sub.NMR] is that calculated from the pulse-field-gradient spin-echo NMR (PGSE-NMR) ionic self-diffusion coefficients and the Nernst-Einstein equation is reported. A decrease in ([C.sub.eff]) effective ionic concentration of the RTILs is well correlated with the normal boiling point and distillation rate, whereas the liquid-state dynamics is controlled by a subtle balance between the electrostatic and other intermolecular forces.

Nuclear magnetic resonance, Ionic solutions, Intermolecular forces, Impedance (Electricity), Atomic properties

---

Physicochemical properties and structures of room-temperature ionic liquids. 3. Variation of cationic structures

Article Abstract:

A series of room-temperature ionic liquids (RTILs) were prepared with different cationic structures, combined with an anion and the thermal property, density, self-diffusion coefficients of the cation and anion, viscosity, ionic conductivity were measured over a wide temperature range. It was found that the relative cationic and anionic self-diffusion coefficients for the RTILs appear to be influenced by the shape of cationic structure and that the microscopic ion dynamics and ionic state significantly contributes to the macroscopic physicochemical properties of the ionic liquids.

Density functionals, Density functional theory, Diffusion processes

---

Magnitude and directionality of interaction in ion pairs of ionic liquids: Relationship with ionic conductivity

Article Abstract:

The intermolecular interaction energies of nine ion pairs of room temperature ionic liquids were studied by MP2/6-311G** level ab initio calculations. Experimental ionic conductivities show that the magnitude and directionality of the interaction energy of the ion pairs play a crucial role in determining the ionic/dissociation dynamics in the ionic liquids.

Liquids, Thermal properties, Dissociation, Dissociation reactions, Ionic crystals

Similar abstracts:

• Abstracts: Relaxation processes in room temperature ionic liquids: The case of 1-butyl-3 methyl imidazolium hexafluorophosphate
• Abstracts: Glass transition dynamics and boiling temperatures of molecular liquids and their isomers. Debye type dielectric relaxation and the glass transition of alcohols
• Abstracts: Ionic conduction and ion diffusion in binary room-temperature ionic liquids composed of [emim][BF4] and LiBF4
• Abstracts: Temperature effect on the adsorption of 1,1,2,2-tetrahydroheptadecafluorodecanol. Phase transition in the adsorbed film of the alkanol and fluoroalkanol mixture

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.