Yameng Wan, Haixia He, Renren Sun
Mar 30, 2020
Citations
0
Influential Citations
11
Citations
Journal
Journal of Molecular Liquids
Abstract
Abstract Mole-fraction solubility of 5-chloro-8-hydroxyquinoline (cloxiquine) Form I in twelve neat solvents namely “methyl acetate (MtAC), ethyl acetate (EtAC), n-propyl acetate (n-PrAC), isopropyl acetate (IPrAC), methanol (MtOH), ethanol (EtOH), n-propyl alcohol (n-PrOH), isopropyl alcohol (IPrOH), 2-methoxyethanol, 2-ethoxyethanol, 1,4-dioxane and acetone (DMK)” was determined under 0.1 MPa in this research work. The results show that cloxiquine solubility is directly proportional to temperature in selected solvents. The general solubility order at 298.15 K is: 1,4-dioxane (0.0751) > 2-ethoxyethanol (0.0333) > n-PrAC (0.0297) > 2-methoxyethanol (0.0291) > EtAC (0.0269) > MtAC (0.0245) > IPrAC (0.0232) > DMK (0.0200) > n-PrOH (0.0076) > EtOH (0.0058) > IPrOH (0.0045) > MtOH (0.0042). Solvent effects on cloxiquine solubility were studied by Kamlet, Abboud and Taft linear solvation energy relationships (KAT-LSER) model, and the results showed that the sensitivity of solvent-solvent interaction (52.16%) was much higher than that of solute-solvent interaction (26.22%). Moreover, five activity coefficient functions (Margules, NRTL, Wilson, NRTL-SAC and UNIQUAC model) were applied for the correlation with solubility data. The average ARD (average relative deviation) is lower than 2.01% and average RMSD (root mean square deviation) lower than 5.87E−4. Five selected models provide good consistencies with experimental solubility values. Furthermore, mixing thermodynamic properties were calculated by Wilson model, the results of which suggested that the mixing of cloxiquine with selected solvents was spontaneous and entropy-driven process.