title: Highly sodium-selective fluoroionophore based on conformational restriction of oligoethyleneglycol-bridged biaryl boron-dipyrromethene.
abstract: A non-PET and non-PCT fluoroionophore has been designed and synthesized based on the combination of a biaryl boron-dipyrromethene fluorophore with an oligoethyleneglycol bridge. A specific red-shift response of absorption for NaClO4 in acetonitrile was demonstrated based on conformational restriction triggered by cation recognition at the bridge. The concentration of Na+ can be determined accurately using fluorescence due to a high extinction coefficient (epsilon = 50 000), a high fluorescence quantum yield (Phif = 0.68), and the sharpness of absorption and emission peaks of the boron-dipyrromethene derivative.
authors.affiliation: Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan.
authors.forename: Koji
authors.initials: K
authors.lastname: Yamada
authors.forename: Yuki
authors.initials: Y
authors.lastname: Nomura
authors.forename: Daniel
authors.initials: D
authors.lastname: Citterio
authors.forename: Naoko
authors.initials: N
authors.lastname: Iwasawa
authors.forename: Koji
authors.initials: K
authors.lastname: Suzuki