Selective Adsorption of Solutes Based on Hydrogen Bonding

作者：Gregory Francis Payne, Yuko Ninomiya · 发表于：Separation Science and Technology · 年份：1990 · DOI：10.1080/01496399008051841 · 被引用次数：25 · 研究领域：Ionic liquids properties and applications、Membrane Separation and Gas Transport、Molecular Junctions and Nanostructures

Current evidence suggests that adsorption of solutes from a nonpolar solvent onto a polycarboxylic ester sorbent involves the formation of a hydrogen bond. This bond appears to be formed between a hydrogen atom of the solute and the carbonyl group of the sorbent. From studies involving single solutes it was observed that the primary amine aniline adsorbed nearly twice as much as the secondary amine N-methylaniline. The tertiary amine N,N-dimethylaniline, which does not contain a nitrogen-bonded hydrogen atom, was unable to bind to the sorbent. In studies involving mixtures, solutes were observed to be selectively adsorbed based on their hydrogen bonding abilities. A simple thermodynamic model which was developed to explain this adsorption was capable of accurately predicting separation factors for the selective adsorption of solutes from solute mixtures.