Ces travaux de thèse ont pour objectif la synthèse de nouveaux corroles de cobalt pour la détection à des concentrations sub-ppm de CO. La détection du monoxyde de carbone à de telles concentrations représente des enjeux de santé publique et industriel.Lors de ces travaux de thèse, les corroles de cobalt tétra-coordinés synthétisés se sont révélés instables dans le temps. Une nouvelle stratégie a été utilisée en se servant de ligands axiaux labiles comme groupements protecteurs des corroles de cobalt. Cette stratégie a permis d’élaborer un capteur détectant le monoxyde de carbone à des seuils de l’ordre du ppb.Enfin la dernière partie de ce travail concerne le développement de nouveaux matériaux poreux à base de corroles de cobalt dont les résultats se révèlent prometteurs pour la détection et le stockage du monoxyde de carbone. / This work aims to develop cobalt corroles for sub-ppm carbon monoxide detection. Surnamed “the silent killer”, detection at low-level of this gas represents a public health and an industrial challenge.During this work, synthesized tetra-coordinated cobalt corroles were found to be not stable over time. A new approach was developed, using labile axial ligands as protective groups of the tetra-coordinated cobalt corrole. This strategy leads to a ppb level detection sensor.The synthesis of new porous organic polymer based on cobalt corroles represents the last part of this work. Gas sorption measurement of these new materials are encouraging for their development for carbon monoxide detection or storage.

The focused laser beam delivered by the high-power laser system PALS was used for laboratory simulation of high-energy-density events in a planetary atmosphere. Several model gas mixtures were prepared to mimic the mildly reducing early Earth's atmosphere (CO-N2-H2O) as well as the atmosphere of Saturn's moon Titan and the strongly reducing early Earth's atmosphere (CH4-N2-H2O). In situ investigation of transient species generated by the laser-induced dielectric breakdown in the gaseous mixtures was performed by optical emission spectroscopy (OES). Final products of laser-plasma initiated chemical reactions were identified and determined by advanced mass-spectrometry (SIFT-MS) and absorption FT-IR spectroscopy. High-power laser system SOFIA was utilized to simulate in our laboratory a high-velocity impact into the icy satellites of the outer planets of the Solar system. OES was engaged in probing the plasmas produced by the SOFIA beam focused on ice surfaces (water, methanol, formamide), while final products were analyzed by means of gas chromatography (GC/MS) and mass-spectrometry (SIFT-MS).