title: Isothermal titration calorimetry study of a bistable supramolecular system: reversible complexation of cryptand[2.2.2] with potassium ions.
abstract: Isothermal titration calorimetry (ITC) is used to investigate the thermodynamics of the complexation of potassium ions by 1,10-diaza-4,7,13,16,21,24-hexaoxabicyclo[8.8.8]hexacosane (cryptand[2.2.2]) in aqueous solution. By changing the pH of the solution it was possible to trigger the reversible complexation/decomplexation of the cryptand in consecutive in situ experiments and to assess for the first time the use of ITC to monitor the thermodynamics of a bistable system.
authors.affiliation: ISIS & icFRC, Université de Strasbourg & CNRS, 8 allée Gaspard Monge, 67000 Strasbourg (France).
authors.forename: Maria G
authors.initials: MG
authors.lastname: del Rosso
authors.forename: Artur
authors.initials: A
authors.lastname: Ciesielski
authors.forename: Silvia
authors.initials: S
authors.lastname: Colella
authors.forename: Jack M
authors.initials: JM
authors.lastname: Harrowfield
authors.forename: Paolo
authors.initials: P
authors.lastname: Samorì
mesh_terms: D019086:Bridged Bicyclo Compounds, Heterocyclic / Q000737:chemistry*; D002151:Calorimetry; D006863:Hydrogen-Ion Concentration; D007477:Ions / Q000737:chemistry; D015394:Molecular Structure; D011188:Potassium / Q000737:chemistry*; D013816:Thermodynamics
chemical_list: D019086:Bridged Bicyclo Compounds, Heterocyclic; D007477:Ions; C006071:cryptating agent 222; D011188:Potassium
keywords: calorimetry; cryptands; isothermal titration calorimetry; potassium; supramolecular chemistry