The Solvent Extraction of Silver Ion by Novel Sulfur-Containing Podans

Jung, Jong Hwa; 정종화; Park, Jung Min; 박정민; Kim, Dae Yeon; 김대연; Lee, Shim Sung; 이심성

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P-ISSN1225-0163
E-ISSN2288-8985
SCOPUS, ESCI, KCI

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P-ISSN 1225-0163
E-ISSN 2288-8985

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Vol.7, No.2

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The Solvent Extraction of Silver Ion by Novel Sulfur-Containing Podans

Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985

1994, v.7 no.2, pp.225-232

Jung, Jong Hwa
Park, Jung Min
Kim, Dae Yeon
Lee, Shim Sung

Jung, J. H., Park, J. M., Kim, D. Y., & Lee, S. S. (1994). The Solvent Extraction of Silver Ion by Novel Sulfur-Containing Podans. , 7(2), 225-232.

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Abstract

The podands I-VII, acyclic polyethers, expected high extractability for $Ag^+$ against $Pb^{2+}$ were designed and synthesized with high yields. Using podands I-VII as extractants, the %extraction(%Ex) of $Ag^+$ and $Pb^{2+}$ as picrates were determined in water/chloroform systems. The stability constants(log K) for the complexation of $Ag^+$ with podands I-VII were also determined by potentiometry. %Ex($Ag^+$) were proportional to the numbers of substituted sulfur donor atoms. Podand VI(log K : 7.65) having 3 substituted sulfur and podand VII(log K : 9.15) having 4 substituted sulfur, however, exhibited almost 100% of extractability, respectively. In %Ex($Ag^+/Pb^{2+}$, oxygen-sulfur mixed donor podands(IV-VII) showed the higher values. Otherwise, the values of log K and %Ex($Ag^+$) largely depended on the variation of donor-site of sulfur. From the results of NMR experiments, it seems that it is due to the ${\pi}-{\pi}$ stacking interaction between the aromatic end-groups.

keywords: Podand, solvent extraction, extractant, <TEX>$Ag^+$</TEX> ion, <TEX>$Pb^{2+}$</TEX> ion, %Ex, log K, NMR, donor-site effect, <TEX>${\pi}-{\pi}$</TEX> stacking