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<dc:title xml:lang="fr">Synthèse et étude d'une nouvelle génération de colorants borondipyrrométhènes (BODIPYs) émettant dans le rouge et le proche infrarouge pour des applications biologiques</dc:title>
<dcterms:alternative xml:lang="en">Synthesis and study of a new generation of red and near infrared emitting borondipyrromethenes (BODIPYs) for biological uses</dcterms:alternative>
<dc:subject xml:lang="fr">BODIPY</dc:subject>
<dc:subject xml:lang="fr">Émetteur rouge et proche infrarouge</dc:subject>
<dc:subject xml:lang="fr">Dimère</dc:subject>
<dc:subject xml:lang="fr">Soluble dans l’eau</dc:subject>
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<dc:subject xml:lang="fr">Détection</dc:subject>
<dc:subject xml:lang="fr">Cystéine</dc:subject>
<dc:subject xml:lang="en">BODIPY</dc:subject>
<dc:subject xml:lang="en">Red and near-infrared emitter</dc:subject>
<dc:subject xml:lang="en">Dimer</dc:subject>
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<dc:subject xml:lang="en">Labelling</dc:subject>
<dc:subject xml:lang="en">Detection</dc:subject>
<dc:subject xml:lang="en">Cysteine</dc:subject>
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<dcterms:abstract xml:lang="fr">Au cours de ces travaux de thèse, la synthèse de BODIPYs émettant dans le rouge et le proche infrarouge a été réalisée. Un premier travail d’extension de la conjugaison électronique (soit par introduction de groupements aromatiques sur le corps du BODIPY, soit par dimérisation) a permis d’atteindre les basses énergies du spectre électromagnétique. La validation d’une méthode de synthèse de BODIPYs à l’aide d’orthoesters a permis une mise en oeuvre aisée et une nette amélioration de leurs rendements. Parmi les fluorophores obtenus, les dithiényl-BODIPYs émettant dans la fenêtre thérapeutique (650-900 nm) présentent des propriétés optiques et électrochimiques intéressantes. Ils ont été utilisés pour des applications dans le domaine biologique. Après leur solubilisation dans les milieux aqueux par introduction de groupements ammoniums, la détection d’un acide aminé, la cystéine, a pu être réalisée par spectroscopies d’absorption et de fluorescence mettant en évidence un système ratiométrique. De plus, le marquage d’une protéine modèle, le sérum d’albumine bovine, permet d’envisager l’utilisation de ce type de BODIPYs pour l’imagerie biologique grâce à un rendement quantique de fluorescence élevé en milieu physiologique.</dcterms:abstract>
<dcterms:abstract xml:lang="en">During this thesis the synthesis of red and near-infrared emitting BODIPYs was realized. First, the electronic conjugaison was extended by introducing aromatic groups on the BODIPY core or by dimerization in order to archieve these low energies of the electromagnetic spectrum. The validation of a synthetic method of BODIPYs with orthoester allowed to have an efficient synthesis with a clear enhancement of the reaction yield. Among the obtained dyes dithienyl-BODIPYs which display an emission in the therapeutic window (650-900 nm) present interesting optical and electrochemical properties. They have been used for applications in the biological field. After their water-solubilization with ammonium groups the detection of an amino-acid (the cysteine) was archieved with a ratiometric system observed in absorption and fluorescence spectrocopies.Moreover the labelling of a model protein, the bovin serum albumine, allows to consider the use of this type of BODIPYs in biological imaging because of a red emission and a high quantum yied in physiologic medium.</dcterms:abstract>
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