Molecular recognition of organic anions by a water-soluble calix[4]arene: Evidence for enthalpy-entropy compensation

被引：21
|
作者：
Bonaccorso, Carmela [1 ]
Ciadamidaro, Antonio
Zito, Valeria [1 ]
Sgarlata, Carmelo
Sciotto, Domenico
Arena, Giuseppe
机构：
[1] Univ Catania, Dipartimento Sci Chim, IBB, CNR, I-95125 Catania, Italy
来源：
THERMOCHIMICA ACTA | 2012年 / 530卷
关键词：
Host-guest complexes; Calixarenes; Aqueous solution; NMR spectroscopy; Isothermal titration calorimetry; Enthalpy-entropy compensation; COMPLEXATION THERMODYNAMICS; SOLVENT REORGANIZATION; CALIXARENES; BINDING; INCLUSION; RECEPTORS; GUESTS; ACID; CHEMISTRY; H-1-NMR;
D O I：
10.1016/j.tca.2011.12.014
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The inclusion of organic anions by the water-soluble tetracationic calix[4]arene TAC4 has been studied at neutral pH by H-1 NMR and isothermal titration calorimetry. The aromatic anions are better included than their aliphatic analogues. The Delta H degrees and Delta S degrees values show that the inclusion processes are mostly enthalpically driven and entropically unfavoured; they also show that an enthalpy-entropy compensation balances the gain in one contribution against a corresponding loss in the other. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：107 / 115
页数：9
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