Haifang Mao , Jiangmei Chen , Qiyu Wang , Mengjie Luo , Zhiqing Li , Changtao Zhou , Bing Wei , Jibo Liu , Miaomiao Jin
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引用次数: 0
Abstract
The molar fraction solubility of sulfentrazone (Form I) in ethanol, n-propanol, i-propanol, n-butanol, and binary solvents (ethanol + water) was measured by a laser dynamic method at temperatures from 278.15 K to 313.15 K under 101.6 kPa (standard uncertainty is = 1.2 kPa). The solid-liquid phase equilibrium data were verified using five thermodynamic models: van't Hoff equation, modified Apelblat equation, λh equation, Wilson model, and modified Jouyban-Acree model. The modified Apelblat equation showed the best fitting results for the solubility correlation of sulfentrazone (Form I). In addition, the molecular interaction was analyzed using the Hirshfeld surface analysis, molecular electrostatic potential surface analysis, and Hansen solubility parameters to understand the dissolution mechanism of sulfentrazone (Form I). Molecular dynamics simulation was used to analyze the radial distribution function to explore intermolecular interactions of sulfentrazone (Form I) in ethanol + water binary solvents. Finally, the thermodynamic properties of sulfentrazone (Form I) in the studied solvents were also discussed using the van't Hoff equation, and the results implied that the dissolution of sulfentrazone (Form I) was an endothermic and entropy-driven process. The solubility data and the relevant thermodynamic analysis of sulfentrazone (Form I) provide fundamental guidance for the crystallization and purification of sulfentrazone (Form I).
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