β-环糊精和部分有机物分子识别作用的焓熵判断

应用气相色谱实验技术,测定了一些有机溶剂（或溶质）在β-环糊精（β-CD）固体表面上的吸附热力学函数.实验结果表明,气相中的有机物质在β-CD表面上的吸附过程之焓、熵互补现象与它们之间的分子识别作用密切相关,它们的绝对值之和可以作为分子识别作用强弱的判据.

Enthalpy and Entropy Criterion for the Molecular Recognize of Some Organic Compounds with Beta Cyclodextrin

Adsorption thermodynamic functions for some organic solvent molecules on the surface of beta cyclodextrin(β -CD） have been measured using gas chromatographic technique.The experimental results confirm that β -CD molecule can form host-guest adduct with adsorbate molecule(guest) as it can in aqueous solution and show that when there is a strong intermolecular force between the host and the guest a type of synergistic interaction exists between,the inner cave and some hydroxyl groups of the CD molecule simultaneously with the apolar/hydrophobic and the polar/hydrophilic parts of the guest molecule.The experimental results also show that a phenomenon of mutual compensation between enthalpy and entropy relates closely with molecular recognize and the sum of the absolute values of adsorption enthalpy and entropy could be considered as a criterion to differentiate intermolecular force of the recognize.