title: Chromogenic calix[4]arene as ionophore for potentiometric and optical sensors.
abstract: Chromogenic calix[4]arene derivative was synthesized and tested as an ionophore for potentiometric and optical sensors. Distinct sodium selectivity was observed with this ionophore based, plasticized PVC membranes in potentiometric measurements suggesting their utility for biological applications. Optode membranes exhibited sodium sensitivity in the 5 x 10(-2) -10(-4)M concentration range. The optical sensitivity was improved by the use of an internal, lipophilic base (TDDA). The operation of the optical sensor is in accordance with the ion-exchange theory.
authors.affiliation: Research Group for Technical Analytical Chemistry of the Hungarian Academy of Sciences, Institute for General and Analytical Chemistry, Technical University, Budapest, Hungary.
authors.forename: K
authors.initials: K
authors.lastname: Tóth
authors.forename: B T
authors.initials: BT
authors.lastname: Thu Lan
authors.forename: J
authors.initials: J
authors.lastname: Jeney
authors.forename: M
authors.initials: M
authors.lastname: Horváth
authors.forename: I
authors.initials: I
authors.lastname: Bitter
authors.forename: A
authors.initials: A
authors.lastname: Grün
authors.forename: B
authors.initials: B
authors.lastname: Agai
authors.forename: L
authors.initials: L
authors.lastname: Tódke