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arXiv physics/9706016physics.chem-ph
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关于水与1,2-二氯乙烷间离子迁移时离子水合作用的一些理论考虑

Some theoretical considerations concerning ion hydration in the case of ion transfer between water and 1,2-dichloroethane

C. Sanchez, S. A. Dassie, A. M. Baruzzi, E. P. M. Leiva

摘要:

使用一个非常简单的模型,基于热力学考虑的水/1,2-二氯乙烷的直接离子转移的一些方面进行了分析。得出的结论是,由水分子的离子溶剂化可能会发生在某些特定的情况下,在有机相,提供了重要的贡献,水和有机相之间的离子转移的吉布斯自由能。一般而言,在界面处具有相对低的表面张力和相应介电常数的倒数之间的大差异的高电荷小离子的情况下,这种特定类型的转移应该是有利的。

英文摘要:

Some aspects of direct ion transfer across the water/1,2-dichloroethane are analyzed using a very simple model based on thermodynamic considerations. It was concluded that ion solvation by water molecules may occur in some particular cases in the organic phase, delivering an important contribution to the Gibbs free energy of ion transfer between the aqueous and the organic phase. In general terms, this particular type of transfer should be favored in the case of highly charged small ions at interfaces with a relatively low surface tension and a large difference between the reciprocal of the corresponding dielectric constants.

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