Effect of temperature and concentration alterations on the volumetric, acoustic and hydration studies of l-threonine in aqueous lactose solutions

The changes in the molecular interactions of 1-ethyl-3-methylimidazolium diethyl phosphate ionic liquid in aqueous and aqueous d-glucose solutions are being investigated through the thermodynamic and compressibility parameters. The purpose of this research is to give insight into details about the thermophysical aspect of cellulose dissolution. Toward this objective, we have evaluated the thermodynamic and compressibility parameters of 1-ethyl-3-methylimidazolium diethyl phosphate in aqueous and in 0.06 and 0.12 mol kg–1 aqueous d-glucose solutions in the concentration range of 0.02 to 0.14 mol kg–1 at different temperatures, i.e., T/K = (288.15 to 318.15). The various derived parameters including the apparent molar volume of solute (V ϕ), limiting apparent molar volume of solute (V ϕ 0), limiting apparent molar expansivity of solute (E ϕ 0), isentropic compressibility of solution (κs), apparent molar isentropic compressibility of solute (K s,ϕ), limiting apparent molar isentropic compressibility of solute (K s,ϕ 0), limiting apparent molar volume of transfer (Δtr V ϕ 0), and limiting apparent molar isentropic compressibility of transfer (Δtr K s,ϕ 0) have been calculated with the help of experimental density (ρ) and sound velocity (c) data. The kosmotropic nature of [EMIm][DEP] has been proven using Hepler’s constant (∂2 V ϕ 0/∂T 2). These estimated experimental values shed light on the numerous physicochemical interactions that exist in the systems and show the presence of significant attractive interactions among 1-ethyl-3-methylimidazolium diethyl phosphate ionic liquid and d-glucose.

Section: Results and Discussionmentioning

confidence: 98%

Section: Apparent Molar Propertiesmentioning

confidence: 99%

Investigation of Molecular Interactions of 1-Ethyl-3-methylimidazolium Diethyl Phosphate in Water and Aqueous d-Glucose Solutions through Thermodynamic and Compressibility Parameters

Jain

Zodape

2023

“…Also, the transfer values of tripotassium citrate are found to be higher than those of sodium benzoate in aqueous [Emim][EtSO 4 ] solutions due to the presence of more hydrophilic groups. Further, the V ϕ 0 values of both the solutes can be written as the sum of several volumes, , as shown in the equation below V ϕ 0 = V vw − V shrinkage + V void Here, V vw is vdW volume of organic salts. The contraction volume or shrinkage volume caused by the electrostriction of a solute is termed V shrinkage , while V void is the contribution related to empty spaces.…”

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Explorations on Solute–Solvent Interactions of Tripotassium Citrate and Sodium Benzoate in Aqueous 1-Ethyl-3-methylimidazolium Ethyl Sulfate Solutions: Physicochemical, Spectroscopic, and Computational Approaches

Singh,

Majid,

Richu

et al. 2023

Self Cite

The present research work is concerned with the thermophysical properties of tripotassium citrate and sodium benzoate in aqueous (0.10, 0.15, and 0.20) mol·kg–1 1-ethyl-3-methylimidazolium ethyl sulfate solutions at temperatures ranging (293.15–313.15) K and 101.3 kPa pressure. The experimentally acquired density, sound speed, and viscosity data have been employed to determine numerous densimetric, acoustic, and viscometric parameters including the apparent molar volumes (V ϕ), partial molar volumes at infinite dilution (V ϕ 0), limiting apparent molar expansibilities (E ϕ 0), apparent molar isentropic compressibilities (K ϕ,s), transfer properties, hydration number (n H), viscosity B-coefficients, and thermodynamic parameters of viscous flow (Δμ1 0, Δμ2 0, ΔH 2 0, and TΔS 2 0). The above-mentioned parameters have been evaluated for the examination of interactions that are prevailing among tripotassium citrate/sodium benzoate and 1-ethyl-3-methylimidazolium ethyl sulfate in an aqueous medium. In addition, UV spectral analysis was used for the examination of interactions existing among the considered systems. Furthermore, the band gaps between the highest occupied molecular orbital and the lowest unoccupied molecular orbital for the studied systems and the interaction characteristics have been calculated using density functional theory. The obtained results inferred the predominance of the hydrophilic–hydrophilic interactions in the systems under investigation.

“…Also, the partial molar volume is related to various other volumes and the relation has been presented below gave the relation of partial molar volume with various other volumes as follows where V vw is the van der Waal’s volume, V void is the volume of unoccupied spaces, and V shrinkage is the depreciation in volume of vitamin that can be due to the effect of interactions prevailing between vitamin molecules and H 2 O molecules. It has been noticed that the contribution of V vw and V void is equivalent in water as well as in an aqueous ionic liquid solution.…”

Section: Results and Discussionmentioning

confidence: 99%

A Comprehensive Study on Molecular Interactions of l-Ascorbic Acid/Nicotinic Acid in Aqueous [BMIm]Br at Varying Temperatures and Compositions: Spectroscopic and Thermodynamic Insights

Richu

Kumar

2021

Self Cite

Herein, thermophysical properties of l-ascorbic acid and nicotinic acid in different compositions (0.05, 0.10, and 0.15) mol kg–1 of aqueous [BMIm]Br solvent media have been investigated. Different thermodynamic and viscometric parameters have been deduced at distinct temperatures (293.15–318.15 K) and at 0.1 MPa via density, speed of sound, and viscosity data to arrive at logical conclusions. The evaluated parameters include partial molar volume (V ϕ 0), partial molar expansivity (E ϕ 0), partial molar isentropic compression (K ϕ,s 0), viscosity coefficients (A and B), transfer values, thermodynamic parameters (Δμ1 0, Δμ2 0, ΔH 2 0, and TΔS 2 0), etc. These parameters have been interpreted in provisions of different interactions prevailing between taken vitamins and [BMIm]Br in an aqueous medium. In addition, UV spectroscopy has been used to examine the interactions prevailing between selected vitamins and [BMIm]Br. From the procured results, we can state that there is supremacy of ion–dipole and dipole–dipole interactions in the studied systems.