title: Sodium and pH responsive hydrogel formation by the supramolecular system calix[4]pyrrole derivative/tetramethylammonium cation.
abstract: We report and rationalize the formation of gels, responsive to sodium cations or pH changes, in aqueous media by a supramolecular system constituted of an aryl extended calix[4]pyrrole receptor and the tetramethylammonium guest.
authors.affiliation: Institute of Chemical Research of Catalonia (ICIQ), Avda. Països Catalans 16, 43007 Tarragona, Spain.
authors.forename: Begoña
authors.initials: B
authors.lastname: Verdejo
authors.forename: Francisco
authors.initials: F
authors.lastname: Rodríguez-Llansola
authors.forename: Beatriu
authors.initials: B
authors.lastname: Escuder
authors.forename: Juan F
authors.initials: JF
authors.lastname: Miravet
authors.forename: Pablo
authors.initials: P
authors.lastname: Ballester
mesh_terms: D047250:Calixarenes / Q000737:chemistry*; D002412:Cations / Q000737:chemistry; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D011166:Porphyrins / Q000737:chemistry*; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D012964:Sodium / Q000737:chemistry*
chemical_list: D002412:Cations; D011166:Porphyrins; D000644:Quaternary Ammonium Compounds; C469811:calix(4)pyrrole; D047250:Calixarenes; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; D012964:Sodium; C027917:tetramethylammonium