Density, Viscosity and Refraction Index of Aqueous Solutions of 7-Hydroxycoumarin and Ethanol or 1-Propanol at Temperatures from 293.15 to 313.15 K

作者：Chen Aiju; Liu Min^*; Zheng Yan; Sun Dezhi; Wang Bingquan; Wang Xu

来源：Journal of Solution Chemistry, 2013, 42(11): 2213-2228.

DOI：10.1007/s10953-013-0100-0

• 7-Hydroxycoumarin
• Density
• Viscosity
• Refractive index
• Ethanol
• 1-Propanol

7-Hydroxycoumarin exhibits antioxidative, lipoxygenase inhibitive and anti-tumourigenic effects. Density and viscosity measurements have been carried out for the solutions of 7-hydroxycoumarin in mixture solvents of water and ethanol or 1-propanol at T = (293.15, 298.15, 303.15, 308.15 and 313.15) K. The measured data have been used to evaluate apparent molar volumes (V (I center dot) ), limiting apparent molar volumes (), viscosity B-coefficients of the Jones-Dole equation and variation of B with temperature (dB/dT). The values of and B-coefficients are positive and pass through their corresponding maxima at about 18 mol center dot kg(-1) ethanol molality and 20 mol center dot kg(-1) 1-propanol molality, respectively. Besides, the values of and B-coefficients decrease with increasing temperature. Molar refractive indices (R (D)) of the ternary solutions at the temperature of 298.15 K have also been determined from measured refractive indices (n (D)). There is an obvious increase of R (D) with increasing molality of the solvent. These parameters have been interpreted in terms of solute-solvent interactions and structure making/breaking ability of components in the aqueous solution. The temperature and concentration dependences of the weak interactions in the solution systems have also been discussed.

• 出版日期2013-11
• 单位杭州医学院; 聊城大学