Abstract
The selective extraction of uranium from sea water has attracted extensive attention because of its urgency in relation to energy problems. In order to design a ligand that can selectively bind uranyl ion (UO**2** plus //2), one has to overcome a difficult problem: i. e. , the ligand must strictly discriminate UO**2** plus //2 from other metal ions present in great excess in sea water. As a unique strategy to solve this difficult problem, we recently synthesized calix left bracket 6 right bracket arene derivatives. In general, UO**2** plus //2 complexes adopt either a pseudoplanar pentacoordinate or hexacoordinate structure which is quite different from the coordination structures of other metal ions. We thus expected that compounds 1 which have a cavity preorganized for the hexacoordinate structure would bind UO**2** plus //2 selectively. We found that compounds 1 have remarkably high stability constants and selectivity factors for UO**2** plus //2. 17 Refs.
Original language | English |
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Pages (from-to) | 391-396 |
Number of pages | 6 |
Journal | Journal of polymer science. Part C, Polymer letters |
Volume | 26 |
Issue number | 9 |
Publication status | Published - Jan 1 1988 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Engineering(all)