Density, Speed of Sound, and Refractive Index of Binary Mixtures of 1-Butyl-3-methylimidazolium Thiocyanate + 2-Alkanols (C₃–C₆) at Different Temperatures T = (288.15-338.15) K

Abstract

Densities, ρ, speed of sound, c, and refractive indices, n, were measured for the binary mixtures of 1-butyl-3-methylimidazolium thiocyanate ([BMIM]­[SCN]) + 2-propanol, 2-butanol, 2-pentanol, and 2-hexanol over the whole range of compositions at temperatures (288.15–338.15) K at intervals of 10 K and ambient pressure (81.5 kPa). A number of mixing rules were evaluated for the refractive index data. Excess molar volume, V m E, temperature-averaged excess molar isobaric expansion, A E, isothermal pressure coefficient of excess molar enthalpy, (∂H m E/∂P) T,x , and excess molar isentropic compressibility, K S E, were derived from the experimental data. The V m E and K S E data were found to be negative for all binary mixtures. V m E and K S E were fitted by the Redlich–Kister equation. The temperature dependence of these excess quantities was also inspected and, where available, compared to literature data of related binary systems. The results were analyzed to discuss the nature and strength of intermolecular interactions.

Understanding X-ray Photoelectron Spectra of Ionic Liquids: Experiments and Simulations of 1-Butyl-3-methylimidazolium Thiocyanate

“…A 32 ion pair model of [C 4 C 1 Im][SCN] with a density of 1.07 g cm –3 97 was simulated using AIMD with the Quickstep code in CP2K, based on the Gaussian and plane waves method (GPW) and using the direct inversion in iterative subspace (DIIS) technique. After pre-equilibration using the classical force field DREIDING, the AIMD simulation was run for 30 ps with a time step of 1 fs.…”

Volumetric, Viscometric, and Refractive Index Studies of Drug Nicotinic Acid in Aqueous d-Xylose/l-Arabinose Solutions from 293.15 to 313.15 K: Insights into Solute–Solute and Solute–Solvent Interactions

“…Volumetric analysis is a crucial method of elucidating the physicochemical phenomena of solutes in solution. − Moreover, the viscosity and refractive index of the mixed solution are two other important parameters that can provide valuable information for a better understanding of intermolecular interactions. − It is well known that most biochemical processes occur in aqueous media. Therefore, research on the volumetric properties, viscometric properties, and refractive indices of drugs in aqueous media is helpful for deepening the understanding of drug molecular interactions, which contributes significantly to advancements in the fields of pharmacy and pharmaceutical chemistry. − However, the drug–solvent interactions that can elucidate the solvation behavior of drugs in vivo are difficult to investigate directly because of the presence of various cosolutes, such as carbohydrates, amino acids, salts, proteins, and so forth in biosystems.…”

Novel Strategies for Physical Data Fitting Based on a Cooling Crystallization Process of myo-Inositol

“…For the physical data, most of the current studies are focused on liquid mixtures − and saturated solutions. − Up to now, the saturation ratio has not been considered as an experimental factor when studying about the physical data of solutions. At the meantime, there is no report about the physical data of MI solution.…”