Silver and thallium(I) complexation with dibenzo-16-crown-4.
Dibenzo-16-crown-4 (1) indicates high silver and thallium(I) ion selectivity over sodium, potassium, and rubidium ion evaluated from the solvent extraction of metal picrates, while its cation-binding ability is lower than those of dibenzo-18-crown-6 (2) and dibenzo-22-crown-6 (3). Taking account of the highest thallium(I) ion selectivity for 1 obtained from extraction experiments, PVC membrane thallium(I)-selective electrodes based on 1 are prepared. The electrode shows the best potentiometric selectivity coefficients for thallium(I) over potassium and rubidium than those of 2 and 3, and commercially available bis(crown ether)s (4).
Ouchi
M
M
Department of Applied Chemistry, Faculty of Engineering, Himeji Institute of Technology, Hyogo, Japan.
Shibutani
Y
Y
Yakabe
K
K
Shono
T
T
Shintani
H
H
Yoneda
A
A
Hakushi
T
T
Weber
E
E
D043844:Crown Ethers; D004988:Ethers, Cyclic / Q000737:chemistry*; D017736:Ion-Selective Electrodes; D008567:Membranes, Artificial; D011143:Polyvinyl Chloride / Q000737:chemistry; D012834:Silver / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry; D013793:Thallium / Q000737:chemistry*
D043844:Crown Ethers; D004988:Ethers, Cyclic; D008567:Membranes, Artificial; D012997:Solvents; C120950:dibenzo-16-crown-4; D012834:Silver; D011143:Polyvinyl Chloride; D013793:Thallium