title: Synthesis and characterization of covalently immobilized bis-crown ether based potassium ionophore.
abstract: The synthesis of a novel covalently immobilized crown ether based potassium ionophore is presented. Apart from previously proposed methods for the preparation of PVC linked ionophores based on the chemical modification of functionalized PVC polymers, the hereby proposed procedure involves the direct copolymerization of a suitable derivative of the bis-crown ether type potassium ionophore (BME 44) and vinyl chloride monomer. The analytical performance of the potentiometric ion selective electrodes incorporating the PVC bound ionophore were optimized and determined. Compared with electrodes based on other bis-crown ether type immobilized potassium selective ionophores a slightly improved logK(K, Na)(Pot) and a longer lifetime was found. Spectral imaging and chronoamperometry were used to study the mobility of different bis-crown ether derivatives in plasticized PVC membranes.
authors.affiliation: Research Group for Technical Analytical Chemistry of the Hungarian Academy of Sciences, Budapest University of Technology and Economics, Szt. Gellert ter 4, Budapest 1111, Hungary.
authors.forename: Róbert
authors.initials: R
authors.lastname: Bereczki
authors.forename: Róbert E
authors.initials: RE
authors.lastname: Gyurcsányi
authors.forename: Béla
authors.initials: B
authors.lastname: Agai
authors.forename: Klára
authors.initials: K
authors.lastname: Tóth
mesh_terms: D043844:Crown Ethers; D004563:Electrochemistry; D007476:Ionophores / Q000138:chemical synthesis* / Q000737:chemistry; D011143:Polyvinyl Chloride; D011188:Potassium
chemical_list: D043844:Crown Ethers; D007476:Ionophores; D011143:Polyvinyl Chloride; D011188:Potassium