By Gregg J. Lumetta, Robin D. Rogers, Aravamudan S. Gopalan

Content material: Calixarenes for separations / C. David Gutsche -- pt. 1. Calizarene-cation crowning glory -- Extraction of cesium by way of calix[4]arene-crown-6: from synthesis to approach / J.-F. Dozol -- improvement of approach chemistry for the elimination of cesium from acidic nuclear waste via calix[4]arene-crown-6 ethers / Peter V. Bonnesen -- Radiation balance of calixarene-based solvent procedure / R.A. Peterson -- habit of calix[4]arene-bis-crown-6 less than irradiation: electrospray-mass spectrometry research and molecular dynamics simulations on Cs+ and Na+ complexes of a degradation compound / V. Lamare -- Interfacial positive factors of assisted liquid-liquid extraction of uranyl and cesium salts: a molecular dynamics research / M. Baaden -- Benzyl phenol derivatives: extraction homes of calixarene fragments / Laetitia H. Delmau -- Calixarene-containing extraction mix for the mixed extraction of Cs, Sr, Pu, and Am from alkaline radioactive wastes / Igor V. Smirnov -- Calix[4]arenes with a unique proton-ionizable crew: synthesis and steel ion separations / Richard A. Bartsch -- Separations of soppy heavy-metal cations via reduce rim-functionalized calix[4]arenes / Galina G. Talanova -- CMPO-substituted calixarenes / Volker Böhmer -- Binding of lanthanides(III) and thorium(IV) via phosphorylated calixarenes / F. Arnaud-Neu -- Lanthanide calix[4]arene complexes investigated via NMR / B. Lambert -- Bimetallic lanthanide supramolecular edifices with calixarenes / Jean-Claude G. Bünzli -- Molecular reputation by means of azacalix[3]arenes / Philip D. Hampton -- steel ion complexation and extraction habit of a few acyclic analogs or tert-butyl-calix[4]arene hydroxamate extractants / Timothy N. Lambert -- Calixarenes as ligands in environmentally-benign liquid-liquid extraction media: aqueous biphasic structures and room tempature ionic beverages / Ann E. Visser -- pt. 2. Calixarene-anion complexation -- Calix[4]pyrrole-functionalized silica gels: novel helps for the HPLC-based separation of anions / Jonathan L. Sessler -- reduce rim amide- and amine-substituted calix[4]arenes as part move extractants for oxyions among an aqueous and an natural part / H. Fred Koch -- pt. three. Calixarene compexation of impartial molecules -- Deep cavities and tablets / Dmitry M. Rudkevich -- Calixarene metalloreceptors: demonstration of dimension and form selectivity inside of a calixarene hollow space / Stephen J. Loeb -- Synthesis and structural research of thiacalixarene derivatives / Mir Wais Hosseini -- Synthesis and fullerene complexation reports of p-allycalix[5]arenes / Charles G. Gibbs -- Hydrogen-bonded cavities established upon resorcin[4]arenes through layout / Leonard R. MacGillivray

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2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. ; Rouquette, H . Angew. Chem. Int. Ed. Engl. 1994, 33, 1506. ;Vicens, J. J. Inclusion Phenom. 1994, 19, 137. ; Rouquette, H . ; Casnati A . J. Inclusion Phenom. Mol. Recognit. Chem. 1994, 19, 399. , Ph. D . Thesis, Universite Louis Pasteur de Strasbourg, 1994. ; Egberink, R. J. ; Reinhoudt, D . N. J. Am. Chem. Soc. 1995, 117, 2767. Asfari, Z . ; Rouquette, H . ; Lamare, V . ; Tournois, Β. Anal. Chem. 1995, 67, 3133. ; Vicens J. New J. Chem. 1996, 20, 453.

None of these other degradation products were identified by H P L C analysis of the solvent system. Impact of Stripping on Solvent System For the solvent systems with either the Isopar L and the n-parrafin diluent, stripping of the solvent system upon exposure to high doses provided difficult. Note that for the second set of tests with the differing diluents, the solvent was not washed immediately after exposure to gamma irradiation. Subsequently, upon the initial contact of the solvent system with acidic solutions (following additional extraction with fresh caustic), the formation of a third phase was observed between the solvent and aqueous phases.

This contact was anticipated to wash some of the deleterious compounds from the solvent system. Thus, Figure 3 contains distribution coefficients for both before and after this washing step. Note that no significant improvement in solvent performance following washing was observed. The sample submitted for HPLC analysis indicated approximately 33% degradation of the calixarene in the solvent. This loss of calixarene would likely be manifested in a lower distribution coefficient. Assuming that the loss of calixarene was linear over the range of exposure and that the distribution coefficient is linear with the amount of calixarene present, it is possible to estimate the distribution coefficient over the range of exposures (using the distribution coefficient at zero dose as a baseline).

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