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

Abstract

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.

Solution Properties of Folic Acid/Nicotinic Acid in Aqueous 1-Butyl-3-methylimidazolium-chloride Media at Discrete Concentrations and Temperatures: A Thermodynamic, Computational, and Spectroscopic Study

“…For all the solvent systems as well as assorted vitamin mixtures, the data of dynamic viscosity has been listed in Table . The accomplished values of viscosity of nicotinic acid in water are found to be in conformity with the obtained literature ,,,, at varied temperatures and this has been illustrated by the comparison graph as shown in Figure S5 (ESI). Further, the viscosity data of [C 4 mim]­[Cl] in water have also been compared with the literature at different temperatures (Figure S6).…”

“…Moreover, to authenticate the appropriateness of the estimated velocity of sound data, the experimental and earlier data for nicotinic acid ,,, and [C 4 mim]­[Cl] in water have been analyzed graphically and shown in Figures S3 and S4 (ESI), respectively, which are in agreement with each other. Furthermore, we have attained that the K ϕ,s values are negative for both the considered vitamins in water and in (0.05–0.15) mol kg –1 aqueous IL systems; furthermore, these negative values are escalating with the increase in concentrations of both vitamins.…”

“…Table renders the experimentally accomplished density values corresponding to all of the studied mixtures at different concentrations and temperatures. Figure S1 (Electronic Supporting Information, ESI) presents the comparison of experimentally attained densities with the earlier work ,,− at varied temperatures for different concentrations of nicotinic acid in water. Also, Figure S2 (ESI) illustrates the comparison graph of obtained density data with the earlier work , for [C 4 mim]­[Cl] in water.…”

Thermophysical Studies on Molecular Interactions of Semicarbazide Hydrochloride/Domiphen Bromide in Aqueous Deep Eutectic Solvent Media at Various Temperatures

“…Δ tr V 0 ϕ has been deliberated by means of the below-ascribed relation Also, the V 0 ϕ of domiphen bromide/semicarbazide hydrochloride can be expressed as a summation of various volumes as presented below where V shrinkage is contraction/depreciation in volume occurring as a result of extensive solvent–solvent interactions, V void is volume allied to empty spaces, and V vw is the van der Waals volume of the taken drugs in the solution. Furthermore, the contribution of V vw and V void is equivalent in water and in maline + water solutions . The deliberated data of Δ tr V 0 ϕ are displayed in Table .…”

Experimental and Theoretical Study on the Hydrogen Bonding between Ascorbic Acid and Cytosine

“…Kwaśniewska and Kiewlicz [6] studied the interactions between cetyltrimethylammonium bromide and AA, and found the existence of ion-ion, ion-dipole and hydrogen bonding interactions based on tensiometric and spectroscopic analysis. Richu and Kumar [7] investigated the thermophysical properties of AA in aqueous [C 4 mim]Br (1methyl-3-butylimidazolium bromide) with varying temperatures and compositions, thereby concluding the supremacy of ion-dipole and dipoledipole interactions in the system. Tian et al [8] found that chitosan and AA could form a soluble complex through ionic interaction.…”