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5-Nitrosalicylaldehyde in aqueous co-solvent mixtures of methanol, ethanol, isopropanol and acetonitrile: Solubility determination, solvent effect and preferential solvation analysis
The Journal of Chemical Thermodynamics ( IF 2.6 ) Pub Date : 2020-01-01 , DOI: 10.1016/j.jct.2019.106014
Xinbao Li , Yating He , Yuyuan Xu , Xiaotian Zhang , Min Zheng , Hongkun Zhao

Abstract The equilibrium 5-nitrosalicylaldehyde solubility in methanol (1) + water (2), ethanol (1) + water (2), isopropanol (1) + water (2) and acetonitrile (1) + water (2) mixtures was determined by a shake-flask method from 273.15 K to 313.15 K under local pressure of 101.2 kPa. At the same mass fraction of methanol (ethanol, isopropanol or acetonitrile) and temperature, the mole fraction solubility of 5-nitrosalicylaldehyde was greater in (acetonitrile + water) mixture than in ethanol (1) + water (2), isopropanol (1) + water (2) and methanol (1) + water (2) mixtures. The relative importance of solute–solvent and solvent–solvent interactions upon the solubility variation was valued by using the linear solvation energy relationship analysis of solvent effect. The method of inverse Kirkwood–Buff integrals was used to study the preferential solvation on the basis of thermodynamic solution properties. The preferential solvation parameters for methanol, ethanol, isopropanol and acetonitrile were positive in the four mixtures in co-solvent-rich and intermediate composition, indicating that 5-nitrosalicylaldehyde was solvated preferentially by the co-solvent. It is conjecturable that in these regions 5-nitrosalicylaldehyde acts as a Lewis acid with the alcohols’ molecules; while for the acetonitrile + water mixture, the preferential solvation could be attributed to polarization effects. Moreover, the drugs’ solubility was mathematically represented via the Jouyban-Acree model acquiring the average relative deviations

中文翻译:

5-硝基水杨醛在甲醇、乙醇、异丙醇和乙腈的水性共溶剂混合物中:溶解度测定、溶剂效应和优先溶剂化分析

摘要 测定了 5-硝基水杨醛在甲醇 (1) + 水 (2)、乙醇 (1) + 水 (2)、异丙醇 (1) + 水 (2) 和乙腈 (1) + 水 (2) 混合物中的平衡溶解度在 101.2 kPa 的局部压力下,通过摇瓶法从 273.15 K 到 313.15 K。在相同质量分数的甲醇(乙醇、异丙醇或乙腈)和温度下,5-硝基水杨醛在(乙腈+水)混合物中的摩尔分数溶解度大于在乙醇(1)+水(2)、异丙醇(1)中的溶解度+ 水 (2) 和甲醇 (1) + 水 (2) 混合物。溶质 - 溶剂和溶剂 - 溶剂相互作用对溶解度变化的相对重要性通过使用溶剂效应的线性溶剂化能量关系分析来评估。基于热力学溶液性质,采用逆柯克伍德-布夫积分方法研究优先溶剂化。甲醇、乙醇、异丙醇和乙腈的优先溶剂化参数在富含共溶剂和中间组成的四种混合物中为正,表明 5-硝基水杨醛被共溶剂优先溶剂化。可以推测,在这些区域中,5-硝基水杨醛与醇分子一起充当路易斯酸;而对于乙腈 + 水混合物,优先溶剂化可归因于极化效应。此外,药物的溶解度通过获得平均相对偏差的 Jouyban-Acree 模型在数学上表示 甲醇、乙醇、异丙醇和乙腈的优先溶剂化参数在富含共溶剂和中间组成的四种混合物中为正,表明 5-硝基水杨醛被共溶剂优先溶剂化。可以推测,在这些区域中,5-硝基水杨醛与醇分子一起充当路易斯酸;而对于乙腈 + 水混合物,优先溶剂化可归因于极化效应。此外,药物的溶解度通过获得平均相对偏差的 Jouyban-Acree 模型在数学上表示 甲醇、乙醇、异丙醇和乙腈的优先溶剂化参数在富含共溶剂和中间组成的四种混合物中为正,表明 5-硝基水杨醛被共溶剂优先溶剂化。可以推测,在这些区域中,5-硝基水杨醛与醇分子一起充当路易斯酸;而对于乙腈 + 水混合物,优先溶剂化可归因于极化效应。此外,药物的溶解度通过获得平均相对偏差的 Jouyban-Acree 模型在数学上表示 可以推测,在这些区域中,5-硝基水杨醛与醇分子一起充当路易斯酸;而对于乙腈 + 水混合物,优先溶剂化可归因于极化效应。此外,药物的溶解度通过获得平均相对偏差的 Jouyban-Acree 模型在数学上表示 可以推测,在这些区域中,5-硝基水杨醛与醇分子一起充当路易斯酸;而对于乙腈 + 水混合物,优先溶剂化可归因于极化效应。此外,药物的溶解度通过获得平均相对偏差的 Jouyban-Acree 模型在数学上表示
更新日期:2020-01-01
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