Calixazacrown ethers for copper(II) ion-selective electrode |
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| Authors: | Park S J Shon O J Rim J A Lee J K Kim J S Nam H Kim H |
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| Institution: | School of Chemistry and Molecular Engineering, Center for Molecular Catalysis, Seoul National University, Seoul 151-742, South Korea. |
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| Abstract: | Five novel 1,3-alternate calix4]azacrown ethers having 2-picolyl, 3-picolyl, and benzyl unit on the nitrogen atom were synthesized and used as ionophores for transition metal-selective polymeric membrane electrodes. The electrode based on 2-picolyl armed 1,3-alternate calix 4] azacrown ether exhibited Nernstian response toward copper (II) ion over a concentration range (10(-4.5) M-10(-2.5) M). The detection limit was determined as 10(-5) M in pH 7 and the selectivity coefficients for possible interfering cations were evaluated. Anions in the sample solution strongly affected the electrode response. |
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