title: Benzodipyrrole derivates as new ionophores for anion-selective electrodes: improving potentiometric selectivity towards divalent anions.
abstract: Two open substituted benzodipyrroles were tested as hydrogen-bond-forming anion ionophores for the development of anion-selective electrodes. These compounds were incorporated in plasticized polymeric membranes with different plasticizers, using different membrane compositions to explore their response towards several anions. The electrodes constructed with membranes containing 2-nitrophenyl octyl ether and a 0.5 molar ratio ionic additive/ionophore showed pronounced anti-Hofmeister behaviour, providing a significantly enhanced response towards the divalent anions sulfate, sulfite, thiosulfate and oxalate. The selected electrodes were also evaluated in terms of detection limits and selectivity. (1)H NMR experiments were carried out in an attempt to explain some aspects of the behaviour observed.
authors.affiliation: Department of Analytical Chemistry, Faculty of Chemistry, University of Murcia, 30100 Murcia, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Cuartero
authors.forename: J A
authors.initials: JA
authors.lastname: Ortuño
authors.forename: M S
authors.initials: MS
authors.lastname: García
authors.forename: G
authors.initials: G
authors.lastname: Sánchez
authors.forename: M
authors.initials: M
authors.lastname: Más-Montoya
authors.forename: D
authors.initials: D
authors.lastname: Curiel
mesh_terms: D000838:Anions / Q000032:analysis / Q000737:chemistry; D004566:Electrodes; D006860:Hydrogen Bonding; D007476:Ionophores / Q000737:chemistry*; D008024:Ligands; D057230:Limit of Detection; D010968:Plasticizers / Q000737:chemistry; D011199:Potentiometry / Q000295:instrumentation*; D011758:Pyrroles / Q000737:chemistry*
chemical_list: D000838:Anions; D007476:Ionophores; D008024:Ligands; D010968:Plasticizers; D011758:Pyrroles