Caesium-selective poly(vinyl chloride) membrane electrodes based on calix[6]arene esters

Autor:	Gyula Svehla, Dermot Diamond, Eileen M. Seward, Stephen J. Harris, Malcolm R. Smyth, Aodhmar Cadogan, M. Anthony McKervey
Rok vydání:	1990
Předmět:	Potassium Potentiometric titration Inorganic chemistry chemistry.chemical_element Ether Alkali metal Biochemistry Vinyl chloride Analytical Chemistry Rubidium Solvent chemistry.chemical_compound chemistry Caesium Electrochemistry Environmental Chemistry Spectroscopy
Zdroj:	The Analyst. 115:1207
ISSN:	1364-5528 0003-2654
DOI:	10.1039/an9901501207
Popis:	Hexameric calix[6]arene ester compounds have shown an ability to extract large alkali metal ions such as caesium and rubidium in phase transfer studies. A potentiometric selectivity study has been made using two ester containing hexameric calix[6]arenes, p-tert-butyl hexaethyl ester (1a) and the unsubstituted hexaethyl ester (1b), as the ionophores for caesium ions. Six electrodes were prepared with 2-nitrophenyl octyl ether as the solvent mediator and various amounts of potassium tetrakis(p-chlorophenyl)borate as the ion exchanger in a poly(vinyl chloride) matrix. The ligands examined produced electrodes with near-Nernstian slopes; the selectivity coefficients for caesium with respect to rubidium, potassium, sodium, lithium, calcium, magnesium, hydrogen and ammonium were determined. Lifetimes of at least 1 month were estimated.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1b5bdcc95fcc12d636ba0a85ef812591 https://doi.org/10.1039/an9901501207 Zobrazit plný text záznamu