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Silver selective electrodes based on thioether functionalized calix[4]arenes as ionophores

✍ Scribed by Elżbieta Malinowska; Zbigniew Brzózka; Krzysztof Kasiura; Richard J.M. Egberink; David N. Reinhoudt

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
728 KB
Volume
298
Category
Article
ISSN
0003-2670

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✦ Synopsis

Silver selective eiectrodes based on thioether functianaiized calix [ 4j arenes 1 and 2 as ionophores were investigated. For both ionophores the selectivity coefficients (log k,,,) were lower than -2.2 for Hg(II) and lower than -4.6 for other cations tested. The best results were obtained with membranes containing dithioether fimctionalized calix[4]arene (ionophore 2), potassium tetrakis( 4-chlorophenyl)borate (KTpClFB) and bis( l-butylpentyl)adipate (BBPA) as a plasticizer. The Ag( I)response functions exhibited almost theoreticd Nernstian slopes in the activity range 1O-6-1O-1 M of silver ions.

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