首页> 外文期刊>Bulletin of the Korean Chemical Society >Determination and Temperature Dependence of n-Octanol/Water Partition Coefficients for Seven Sulfonamides from(298.15 to 333.15)K
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Determination and Temperature Dependence of n-Octanol/Water Partition Coefficients for Seven Sulfonamides from(298.15 to 333.15)K

机译:(298.15至333.15)K的7种磺酰胺的正辛醇/水分配系数的测定及其温度依赖性

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摘要

A shake-flask method was used to determine the n-octanol/water partition coefficients of sulfamethazine,sulfadimethoxine,sulfamethoxydiazine,sulfamonomethoxine,sulfamethoxazole,sulfaquinoxaline and sulfa-chloropyrazine from(298.15 to 333.15)K.The results showed that the n-octanol/water partition coefficient of each sulfonamide decreased with the increase of temperature.Based on the fluid phase equilibrium theory,the thermodynamic relationship of n-octanol/water partition coefficient depending on the temperature is proposed,and the changes of enthalpy,entropy,and the Gibbs free energy function for sulfonamides partitioning in n-octanol/water are determined,respectively.Sulfonamides molecules partitioning in n-octanol/water is mainly an enthalpy driving process,during which the order degrees of system increased.The temperature effect coefficient of n-octanol/water partition coefficient is discussed.The results show that its magnitude is the same as that of values in the literature.
机译:用摇瓶法测定了(298.15至333.15)K中磺胺二甲嘧啶,磺胺二甲恶嗪,磺胺甲氧基二嗪,磺胺单甲恶嗪,磺胺甲恶唑,磺胺喹喔啉和磺胺氯吡嗪的正辛醇/水分配系数,结果表明正辛醇/氯磺酰胺的水分配系数随温度的升高而降低。基于液相平衡理论,提出了正辛醇/水分配系数随温度变化的热力学关系,以及焓,熵和吉布斯的变化。正辛醇/水中分配的磺酰胺分子的自由能函数分别得到确定。正辛醇/水中分配的磺酰胺分子主要是焓驱动过程,在此过程中,系统的有序度增加。正辛醇的温度效应系数结果表明,其大小与文献中的值相同。

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