title: Binding of inorganic cations by p-sulfonatocalix[4]arene monitored through competitive fluorophore displacement in aqueous solution.
abstract: A new working principle for detecting inorganic cation binding by water-soluble calix[4]arenes involves the displacement of a fluorescent azoalkane as guest. Fluorescence regeneration is observed for various metal ions, and binding of monovalent cations (alkali and ammonium) to p-sulfonatocalix[4]arene is detected and quantified for the first time.
authors.affiliation: School of Engineering and Science, International University Bremen, Campus Ring 1, 28759 Bremen, Germany.
authors.forename: Hüseyin
authors.initials: H
authors.lastname: Bakirci
authors.forename: Apurba L
authors.initials: AL
authors.lastname: Koner
authors.forename: Werner M
authors.initials: WM
authors.lastname: Nau