title: Calix[4]arene-porphyrin conjugates as versatile molecular receptors for anions.
abstract: [structure: see text] Appending tetraphenylporphyrin units to the calix[4]arene skeleton via the ureido function leads to novel anion receptors designed for anion and/or cation detection by UV-vis spectroscopy. Calixarenes in the cone or 1,3-alternate conformations bearing two ureido moieties on the upper rim represent well-preorganized cavities where the anion can be held by synchronous hydrogen bonding interaction with the NH groups.
authors.affiliation: Department of Organic Chemistry, Institute of Chemical Technology, Technická 5, 166 28 Prague 6, Czech Republic.
authors.forename: Miroslav
authors.initials: M
authors.lastname: Dudic
authors.forename: Pavel
authors.initials: P
authors.lastname: Lhoták
authors.forename: Ivan
authors.initials: I
authors.lastname: Stibor
authors.forename: Kamil
authors.initials: K
authors.lastname: Lang
authors.forename: Petra
authors.initials: P
authors.lastname: Prosková
mesh_terms: D000838:Anions / Q000032:analysis*; D001665:Binding Sites; D047250:Calixarenes; D008968:Molecular Conformation; D010636:Phenols / Q000737:chemistry*; D011166:Porphyrins / Q000737:chemistry*; D013057:Spectrum Analysis; D013329:Structure-Activity Relationship
chemical_list: D000838:Anions; D010636:Phenols; D011166:Porphyrins; C121325:calix(4)arene; D047250:Calixarenes