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Synthèse et caractérisation de molécules polyhétérocycliques azotées pour la complexation de cations metalliques polluants

Abstract : The recovery of actinides(III) from the mixture actinides(III)/lanthanides(III) is a great deal of the nuclear waste management. Experiences have shown that derivatives of 2,6- bis(1,2,4-triazin-3-yl)pyridine (BTP) are able to extract selectively actinides(III) from lanthanides(III). But the properties of these molecules need to be reinforced to exhibit best extraction performances and to resist to the harsh conditions of the extracting processes. Originally functionnalized ligands were synthesized and tested in a radioactive medium. In a second part, this work focuses on the control and the detection of actinides(III). This could be done thanks to the use of a chemical sensor such as quartz crystal microbalance. The study of this apparatus required the preliminary synthesis of original complexing BTP-derived structures. The last part of this work deals with the study of new synthetic ways to afford the BTP moiety. The palladium-catalyzed cross-coupling reaction of 3-methylthio-1,2,4-triazine with various 2-stannylated pyridines have been explored. Our investigations have also allowed to develop a method for synthesizing unsymmetrical 1,2,4,5-tetrazines from the cross-coupling reaction between 3-methylthio-6-(morpholin-N-yl)-1,2,4,5-tetrazine and organoboron / organostannane derivatives.
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  • HAL Id : tel-00465122, version 1

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Nicolas Leconte. Synthèse et caractérisation de molécules polyhétérocycliques azotées pour la complexation de cations metalliques polluants. Autre. Université d'Orléans, 2007. Français. ⟨tel-00465122⟩

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