Abstract

The Gibbs energy of transfer is determined via the interphase distribution of a substance between two immiscible phases. β-cyclodextrin (βCD) from water is used in a mixture with dimethylsulfoxide (χ_DMSO = 0.0–0.6 mole fraction) at 298 K. The effect of the solvent’s composition has on the thermodynamic characteristics of βCD solvation is analyzed. It is found that increasing the content of DMSO in a mixed solvent leaded to negligible desolvation of cyclodextrin, due probably to the compensation effect between the enthalpy and entropy components of the Gibbs energy of βCD transfer.

中文翻译：

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β-环糊精在水-二甲基亚砜溶剂中的热力学

摘要

吉布斯传递能是通过物质在两个不混溶相之间的相间分布来确定的。从水β环糊精（βCD）与二甲亚砜（χ的混合物使用_DMSO 在298K有βCD溶剂化的热力学特性进行分析的溶剂的组合物的效果= 0.0-0.6摩尔分数）。发现增加DMSO在混合溶剂中的含量导致环糊精的去溶剂化作用可以忽略，这可能是由于βCD转移的吉布斯能量的焓和熵成分之间的补偿作用所致。