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Exploration of the solvation behavior of the synthesized 1-hexyl-3-methylimidazolium bromide [C6mim][Br] ionic liquid with L-cysteine and N-acetyl L-cysteine) in aqueous medium at different temperatures
Journal of Molecular Liquids ( IF 5.3 ) Pub Date : 2020-10-31 , DOI: 10.1016/j.molliq.2020.114664
Harsh Kumar , Ravinder Sharma , Vaneet Kumar , Asma A. Alothman

The interactions of L-cysteine and N-acetyl L-cysteine with imidazolium-based ionic liquid 1-hexyl-3-methylimidazolium bromide [C6mim] [Br] as a function of temperature have been studied by a combination of volumetric and acoustic properties. Densities and speeds of the sound of L-cysteine and N-acetyl L-cysteine in (0.00, 0.005, 0.01, 0.03 and 0.05) mol.kg−1 aqueous solutions of 1-hexyl-3-methylimidazolium bromide have been measured at T = (288.15, 298.15, 308.15 and 318.15) K. From density data, the apparent molar volume (Vϕ) the partial molar volume (Vϕ0) and standard partial molar volumes of transfer (ΔVϕ0) for L-cysteine and N-acetyl L-cysteine from water to aqueous 1-hexyl-3-methylimidazolium bromide solutions have been calculated. Partial molar isentropic compression (Kϕ,s) and partial molar isentropic compression of transfer (ΔKϕ, S0) have been calculated from the speed of sound data. The pair and triplet interaction coefficient have been calculated from both these properties. The parameters obtained have been used to describe the results in terms of (solute-solute), (solute-solvent) interactions, structure building and structure floating behavior of amino acids in aqueous 1-hexyl-3-methylimidazolium bromide solutions.



中文翻译:

合成的1-己基-3-甲基咪唑鎓溴化物[C 6 mim] [Br]离子液体与L-半胱氨酸和N-乙酰基L-半胱氨酸在不同温度下在水介质中的溶剂化行为探索

结合体积和声学研究了L-半胱氨酸和N-乙酰基L-半胱氨酸与咪唑基离子液体1-己基-3-甲基咪唑鎓溴化物[C 6 mim] [Br]的相互作用。属性。在T下测量了(0.00、0.005、0.01、0.03和0.05)mol.kg -1溴化1-己基-3-甲基咪唑鎓盐水溶液中L-半胱氨酸和N-乙酰基L-半胱氨酸的密度和声音速度=(288.15,298.15,308.15和318.15)K.从密度数据,表观摩尔体积(V φ)的部分摩尔体积(V φ 0)和转移的标准偏摩尔体积(ΔV φ0)对于L-半胱氨酸和N-乙酰基L-半胱氨酸,从水到1-己基-3-甲基咪唑鎓溴化物水溶液已被计算。偏摩尔等熵压缩(ķ φ,S)和转让的偏摩尔熵压缩(ΔK φš 0)已经被从声音数据的速度来计算。对和三重态相互作用系数已经从这两个特性计算得出。所获得的参数已用于描述氨基酸在(1-己基-3-甲基咪唑鎓)溴化物水溶液中的(溶质-溶质),(溶质-溶剂)相互作用,氨基酸的结构建立和结构漂浮行为。

更新日期:2020-11-02
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