title: Calixazacrown ethers for copper(II) ion-selective electrode.
abstract: Five novel 1,3-alternate calix[4]azacrown ethers having 2-picolyl, 3-picolyl, and benzyl unit on the nitrogen atom were synthesized and used as ionophores for transition metal-selective polymeric membrane electrodes. The electrode based on 2-picolyl armed 1,3-alternate calix [4] azacrown ether exhibited Nernstian response toward copper (II) ion over a concentration range (10(-4.5) M-10(-2.5) M). The detection limit was determined as 10(-5) M in pH 7 and the selectivity coefficients for possible interfering cations were evaluated. Anions in the sample solution strongly affected the electrode response.
authors.affiliation: School of Chemistry and Molecular Engineering, Center for Molecular Catalysis, Seoul National University, Seoul 151-742, South Korea.
authors.forename: S J
authors.initials: SJ
authors.lastname: Park
authors.forename: O J
authors.initials: OJ
authors.lastname: Shon
authors.forename: J A
authors.initials: JA
authors.lastname: Rim
authors.forename: J K
authors.initials: JK
authors.lastname: Lee
authors.forename: J S
authors.initials: JS
authors.lastname: Kim
authors.forename: H
authors.initials: H
authors.lastname: Nam
authors.forename: H
authors.initials: H
authors.lastname: Kim