Selective extraction and transport of UO22+ with calixarene-based uranophiles

Seiji Shinkai, Yoshiharu Shiramama, Hiroshi Satoh, Osamu Manabe, Takashi Arimura, Kiyoshi Fujimoto, Tsutomu Matsuda

Research output: Contribution to journalArticle

109 Citations (Scopus)

Abstract

Hexacarboxylate derivatives of p-t-butylcalix[6]arene (2b) and p-hexylcalix[6]arene (3b) extract uranyl ion (UO 22+) efficiently and selectively from water into organic media. This high selectivity can be attributed to the nature of calix[6]arene; this is suitably structured for the binding of UO 22+, which requires a pseudo-planar hexaco-ordination. When trioctylmethylammonium cation (TMA+) is added to the organic phase, the stoicheiometry of the extraction species [UO 22+/(2b)] changes from 1:3 to 1:1-2. This implies that an additional 1-2 mol of UO 22+ are adsorbed to (2b) to form ‘neutral’ extraction species and can be displaced by added TMA+. UO 22+ is transported by (2b) across a liquid membrane from a neutral IN (source) aqueous phase (pH 8.5) to an acidic OUT (receiving) aqueous phase (0.1 mol dm-3 HCl) in an active transport manner. The rate-determining step is the release of UO 22+ from the membrane to the OUT aqueous phase. On the basis of these basic data, we have prepared polymer/liquid-crystal (N-4′-ethoxybenzylidene-4-butylaniline, EBBA/TMA+Cl) composite membranes immobilising (2b) and have found that the rate of UO 22+ transport is efficiently controlled by the changes in pH and temperature. These are novel examples for the selective transport of UO 22+.

Original languageEnglish
Pages (from-to)1167-1171
Number of pages5
JournalJournal of the Chemical Society, Perkin Transactions 2
Issue number8
DOIs
Publication statusPublished - Jan 1 1989
Externally publishedYes

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Calixarenes
Liquid membranes
Composite membranes
Cations
Ions
Derivatives
Membranes
Water
Temperature
N-(4-ethoxybenzylidene)-4-butylaniline

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

Cite this

Shinkai, S., Shiramama, Y., Satoh, H., Manabe, O., Arimura, T., Fujimoto, K., & Matsuda, T. (1989). Selective extraction and transport of UO22+ with calixarene-based uranophiles. Journal of the Chemical Society, Perkin Transactions 2, (8), 1167-1171. https://doi.org/10.1039/P29890001167

Selective extraction and transport of UO22+ with calixarene-based uranophiles. / Shinkai, Seiji; Shiramama, Yoshiharu; Satoh, Hiroshi; Manabe, Osamu; Arimura, Takashi; Fujimoto, Kiyoshi; Matsuda, Tsutomu.

In: Journal of the Chemical Society, Perkin Transactions 2, No. 8, 01.01.1989, p. 1167-1171.

Research output: Contribution to journalArticle

Shinkai, S, Shiramama, Y, Satoh, H, Manabe, O, Arimura, T, Fujimoto, K & Matsuda, T 1989, 'Selective extraction and transport of UO22+ with calixarene-based uranophiles', Journal of the Chemical Society, Perkin Transactions 2, no. 8, pp. 1167-1171. https://doi.org/10.1039/P29890001167
Shinkai, Seiji ; Shiramama, Yoshiharu ; Satoh, Hiroshi ; Manabe, Osamu ; Arimura, Takashi ; Fujimoto, Kiyoshi ; Matsuda, Tsutomu. / Selective extraction and transport of UO22+ with calixarene-based uranophiles. In: Journal of the Chemical Society, Perkin Transactions 2. 1989 ; No. 8. pp. 1167-1171.
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