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Pyridinyl hydrazone derivatives of thiacalix[4]arene as selective extractants of transition metal ions |
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| Authors: | Sergey N Podyachev Nadezda E Burmakina Victor V Syakaev Svetlana N Sudakova Wolf D Habicher Alexander I Konovalov |
| Institution: | 1. A.E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center of the Russian Academy of Sciences, Arbuzov Street 8, Kazan, 420088, Russian Federation 2. Kazan State Technological University, K. Marks Street 68, Kazan, 420015, Russian Federation 3. Institute of Organic Chemistry, Dresden University of Technology, Mommsenstrasse 13, 01062, Dresden, Germany |
| Abstract: | The recognition ability of pyridinyl hydrazone derivatives of cone- and 1,3-alternate tetrathiacalix4]arenes towards transition and alkali metals has been investigated by picrate extraction method. The stoichiometry of complexes and the extraction constants have been determined. It has been found that hydrazones do not extract alkali metal ions but show an excellent affinity towards transition and heavy metal cations. The removal of tert-butyl groups from calix4]arene platform in the case of cone and 1,3-alternate isomers leads to an increase of d-ion extraction selectivity or efficiency. |
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