Densities, Sound Speed, and Viscosities of Some Amino Acids with Aqueous Tetra-Butyl Ammonium Iodide Solutions at Different Temperatures

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• 作者：Suresh Kumar Sharma ; Gurpreet Singh ; Harsh Kumar ; Ramesh Kataria
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2015
• 出版时间：September 10, 2015
• 年：2015
• 卷：60
• 期：9
• 页码：2600-2611
• 全文大小：380K
• ISSN：1520-5134

文摘

Apparent molar volumes (V_鈱€), apparent molar isentropic compression (K_鈱€,s), and viscosity B coefficient of glycine, l-alanine, and l-valine in (0.01 and 0.03) mol路kg^鈥? aqueous tetrabutyl ammonium iodide (TBAI) solutions have been determined at temperatures (288.15, 293.15, 298.15, 303.15, and 308.15) K from their experimental density, ultrasonic speed, and flow time measurements, respectively. Partial molar volumes (V_鈱€⁰) and partial molar isentropic compression (K_鈱€,s⁰) have been determined from the above measurements. Further, these data were used to calculate the corresponding transfer parameters (螖V_鈱€,s⁰ and 螖K_鈱€,s⁰), hydration number (n_H), side chain group contributions of V_鈱€⁰, and viscosity B coefficients of the amino acids, partial molar expansibilities (E_鈱€⁰), (dB/dT), and related parameters. The trends of variations of experimental and computed parameters have been discussed in terms of solute鈥搒olvent interactions with an emphasis on structure-making and structure-breaking ability of the above amino acids in the solvent mixture.