title: A calix[4]arene derivative and its selective interaction with drugs (clofibric acid, diclofenac and aspirin).
abstract: The synthesis and characterisation of a partially substituted calix[4]arene, namely, 5,11,17,23-tetra-tert-butyl,25,27-bis[aminoethoxy] 26,28-dihydroxycalix[4]arene are reported. Its interaction with commonly used pharmaceuticals (clofibric acid, diclofenac and aspirin) was investigated by spectroscopic (1H NMR and UV), electrochemical (conductance measurements) and thermal (titration calorimetry) techniques. It is concluded on the basis of the experimental work and molecular simulation studies that the receptor interacts selectively with these drugs. Preliminary studies on the selective extraction of these pharmaceuticals from water by the calix receptor are reported and the potential for a carrier mediated sensor based on this ligand for 'on site' monitoring of pharmaceuticals is discussed.
authors.affiliation: Laboratory of Thermochemistry, Department of Chemistry, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom. Electronic address: A.Danil-De-Namor@surrey.ac.uk.
authors.forename: Angela F
authors.initials: AF
authors.lastname: Danil de Namor
authors.affiliation: Laboratory of Thermochemistry, Department of Chemistry, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom.
authors.forename: Maan
authors.initials: M
authors.lastname: Al Nuaim
authors.affiliation: Laboratory of Thermochemistry, Department of Chemistry, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom.
authors.forename: Jose A
authors.initials: JA
authors.lastname: Villanueva Salas
authors.affiliation: Laboratory of Thermochemistry, Department of Chemistry, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom.
authors.forename: Sophie
authors.initials: S
authors.lastname: Bryant
authors.affiliation: Computational Research Group, Department of Chemistry, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom.
authors.forename: Brendan
authors.initials: B
authors.lastname: Howlin
mesh_terms: D001241:Aspirin / Q000737:chemistry*; D047250:Calixarenes / Q000737:chemistry*; D002151:Calorimetry; D002995:Clofibric Acid / Q000737:chemistry*; D004008:Diclofenac / Q000737:chemistry*; D004553:Electric Conductivity; D008958:Models, Molecular; D010636:Phenols / Q000737:chemistry*; D066244:Proton Magnetic Resonance Spectroscopy; D013056:Spectrophotometry, Ultraviolet; D013816:Thermodynamics
chemical_list: D010636:Phenols; C121325:calix(4)arene; D047250:Calixarenes; D004008:Diclofenac; D002995:Clofibric Acid; D001241:Aspirin
keywords: Aspirin; Calixarenes; Clofibric acid; Diclofenac; Pharmaceuticals; Thermodynamics