title: Hydrogen ion-selective poly(vinyl chloride) membrane electrode based on a calix[4]arene.
abstract: A hydrogen ion-selective poly(vinyl chloride) membrane electrode was constructed using 5,11,17,23-tetra-tert-butyl-25,26,27,28-tetracyanomethoxycalix[4]arene as a neutral carrier. The electrode showed an apparent Nernstian response in the 2-11.5 pH range with a slope of 54.0 +/- 0.2 mV/pH at 20 +/- degrees C. This electrode showed a rapid response of the emf to changes in the pH, high ion selectivity with respect to lithium, sodium and potassium, and characteristics similar to those reported for the conventional pH glass membrane electrode. It can be used as a potentiometric indicator electrode in hydrofluoric acid solutions. The effects of iodide, thiocyanate, perchlorate and bromide on the characteristics of the electrode were also considered.
authors.affiliation: Department of Chemistry, Faculty of Science, Ankara University, Ankara, Turkey.
authors.forename: Demet
authors.initials: D
authors.lastname: Kuruoğlu
authors.forename: Esin
authors.initials: E
authors.lastname: Canel
authors.forename: Shahabuddin
authors.initials: S
authors.lastname: Memon
authors.forename: Mustafa
authors.initials: M
authors.lastname: Yilmaz
authors.forename: Esma
authors.initials: E
authors.lastname: Kiliç
mesh_terms: D047250:Calixarenes; D006859:Hydrogen; D006863:Hydrogen-Ion Concentration; D017736:Ion-Selective Electrodes / Q000592:standards*; D010636:Phenols; D011143:Polyvinyl Chloride; D012016:Reference Values; D012680:Sensitivity and Specificity; D013997:Time Factors
chemical_list: D010636:Phenols; C121325:calix(4)arene; D047250:Calixarenes; D006859:Hydrogen; D011143:Polyvinyl Chloride