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L'azote comme élément mineur dans les macromolécules organiques chondritiques et cométaires : simulations expérimentales contraintes par les cosmomatériaux

Abstract : The aim of my PhD work was to add some new constraints on the organic precursors compositions in the early solar system. Thermal degradation experiments have been performed, using N-rich analog materials. High resolution mass spectrometry gives us the possibility to better characterize the HCN polymers another type of analog materials. This part of the study provides us new informations about the molecular diversity of HCN polymers and also new constraints on their structure. The thremal degradation experiments were then performed. The aim of this study was to provide some new constraints on the composition of the organic precursors present in the early solar system and incorporated in the different bodies (carbonaceous chondrites, IDPs, UCAMMs). We can conclude that the organic precursor of the IOMs was poor in nitrogen while the organic matter accreted by the parent bodies of IDPs and UCAMMs was probably nitrogen rich.
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Jean-Yves Bonnet. L'azote comme élément mineur dans les macromolécules organiques chondritiques et cométaires : simulations expérimentales contraintes par les cosmomatériaux. Sciences de la Terre. Université de Grenoble, 2012. Français. ⟨NNT : 2012GRENU004⟩. ⟨tel-00787244⟩

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