Extraction properties of 25,27-bis(carbonylmethoxy)calix[4]arenes towards Sr2+: competitive extraction and extraction in a synthetic groundwater |
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Authors: | Sebastian Haupt René Schnorr Maria Poetsch Alexander Mansel Marcel Handke Berthold Kersting |
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Institution: | 1. Institut für Anorganische Chemie, Fakult?t für Chemie und Mineralogie, Universit?t Leipzig, Johannisallee 29, 04103, Leipzig, Germany 2. Abteilung Reaktiver Transport, Institut für Ressourcen?kologie, Helmholtz-Zentrum Dresden-Rossendorf e.V. (HZDR), Forschungsstelle Leipzig, Permoserstra?e 15, 04318, Leipzig, Germany
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Abstract: | The Sr2+ extraction properties of some 25,27-bis(carbonylmethoxy)calix4]arenes, in which ester (–CH2CO2Et), keto (–CH2COCH3) and acid functionalities (–CH2CO2H) have been attached to the lower rim, are reported. Strontium ion extraction experiments were performed in a chloroform/water system, and the extraction performance analyzed by radiotracing using the short-lived radio nuclide 85Sr. Effects of pH value, ligand to metal ratio, temperature, extraction time and strontium species on the extraction behavior were examined. It was observed that the 25,27-bis(carboxymethoxy)calix4]arene derivatives are potent extracting agents towards the strontium ion, showing remarkable extraction performance in competition with a series of organic and inorganic impurities and in a synthetic groundwater. The crystal structure of 25,27-bis(acetonyloxy)calix4]arene is also reported. |
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