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<dc:title xml:lang="en">Orthogonal synthesis of poly(alkoxyamine phosphodiester)s for data storage applications</dc:title>
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<dc:subject xml:lang="fr">Polymères à séquences définies</dc:subject>
<dc:subject xml:lang="fr">Polymères digitaux</dc:subject>
<dc:subject xml:lang="fr">Synthèse itérative</dc:subject>
<dc:subject xml:lang="fr">Séquençage MS/MS</dc:subject>
<dc:subject xml:lang="en">Sequence-defined polymers</dc:subject>
<dc:subject xml:lang="en">Digital polymers</dc:subject>
<dc:subject xml:lang="en">Iterative synthesis</dc:subject>
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<tef:elementdEntree autoriteExterne="031730507" autoriteSource="Sudoc">Copolymères séquencés</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="031918247" autoriteSource="Sudoc">Nanotechnologie</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">Une stratégie itérative de type AB+CD a été développée afin de synthétiser des polymères à séquences définies. Cette approche, basée sur des réactions orthogonales, a permis la synthèse de poly(alcoxyamine phosphodiester)s sans utiliser de groupements protecteurs. Ces copolymères sont composés de deux sous-unités, définies arbitrairement comme bit 0 et bit 1, ce qui permet le stockage d’information à l’échelle moléculaire. Les polymères synthétisés se sont révélés faciles à séquencer, la fragmentation par MS/MS des liaisons labiles de type alcoxyamine générant des spectres prédictibles. D’autres techniques de séquençage, comme l’approche de séquençage sans fragmentation ont aussi été utilisées. En outre, la chaine principale des polymères a été modifiée afin de pouvoir utiliser un alphabet étendu, optimisation permettant d’augmenter la densité d’information tout en maintenant la simplicité du séquençage. Enfin, deux liaisons alcoxyamine de stabilités différentes ont été insérées dans la chaine principale. Ceci permet l’obtention de polymères pouvant être fragmentés à des positions définies via l’utilisation de différents stimuli.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Uniform sequence-defined polymers were synthesized using a new iterative (AB+CD) strategy involving two orthogonal reactions. This approach allowed the protecting-group free synthesis of uniform poly(alkoxyamine phosphodiester)s. These molecules, having a defined sequence of comonomers defined as bits 0 and 1, enable the data storage of binary information at the molecular level. Interestingly, poly(alkoxyamine phosphodiester)s were found to be extremely easy to sequence. Indeed, the cleavage of the labile alkoxyamine bond in MS/MS generates “easy-to-read” fragmentation patterns. The sequencing was also tested using non-conventional techniques as fragmentation-free sequencing. Furthermore, the poly(alkoxyamine phosphodiester) backbone was modified using an extended alphabet. This optimization increases the storage capacity maintaining the read-out by MS/MS easy. Finally, two alkoxyamine bonds, having different stabilities, were inserted in the poly(alkoxyamine phosphodiester) backbone to obtain sequence-defined polymers which can be fragmented in defined positions of the chain using different stimuli.</dcterms:abstract>
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