Investigations of (solute-solute) and (solute-solvent) interactions in ternary {amino acids + 1-dodecyl-3-methylimidazolium bromide [C12mim] [br] + water} mixtures at different temperatures. (March 2021)

• Record Type: Journal Article
• Authors: Kumar, Harsh; Sharma, Ravinder; Kumar, Vaneet; Alam, Manawwer
• Is Part Of: Journal of chemical thermodynamics. Volume 154(2021)
• Publication Date: 2021-03
• Subjects: 1-dodecyl-3-methylimidazolium bromide -- Glycine -- L-valine -- Apparent molar volume -- Apparent molar isentropic compression; Thermodynamics -- Periodicals; Thermochemistry -- Periodicals; Thermodynamique -- Périodiques; Thermochimie -- Périodiques; Thermochemistry; Thermodynamics; Periodicals; 541.369
• DOI: 10.1016/j.jct.2020.106340
• Languages: English
• ISSNs: 0021-9614

Abstract

Highlights: Synthesis and characterization of long chain 1-dodecyl-3-methylimidazolium bromide [C12 mim][Br] ionic liquid. Density and speed of sound of amino acids in aqueous [C12 mim][Br] solutions. Solute-solvent interactions dominate as indicated by apparent molar properties. Structure making tendency of amino acids is predicted from the study. Abstract: Density and speed of sound of an aqueous solution of glycine and L-valine containing 1-dodecyl-3-methylimidazolium bromide, [C12 mim] [Br], have been determined at T = (288.15 K to 308.15 K). From experimental density, the apparent molar volumes ( Vϕ ), the apparent molar volumes at infinite dilution ( V ϕ 0 ) and partial molar volume of transfer Δ V ϕ 0 have been calculated. The values of apparent molar volumes ( Vϕ ) are positive for both glycine and L-valine and increase with the increase in temperature and concentration of 1-dodecyl-3-methylimidazolium bromide. On the other hand speed of sound data have been used to determine partial molar isentropic compression ( Kϕ, s ), partial molar isentropic compression at infinite dilution ( K ϕ, s 0 ) and partial molar isentropic compression of transfer Δ K ϕ, S 0 . The obtained volumetric and acoustic parameters will be helpful to understand mixing effects, structural changes and other complex biological processes between head and side-chain groups of glycine or L-valine and ionic liquid [C12 mim] [Br] in aqueous medium.