The inclusion of organic anions by the water-soluble tetracationic calixarene 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 DH° and DS° 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.
|Titolo:||Molecular recognition of organic anions by a water-soluble calixarene: evidence for enthalpy–entropy compensation|
|Data di pubblicazione:||2012|
|Appare nelle tipologie:||1.1 Articolo in rivista|