Exploration des interactions métallique-ion dans les hydrocarbures aromatiques polycycliques empilés comme modèle moléculaire de la supraconductivité
DOI :
https://doi.org/10.18192/osurj.v5i1.7932Résumé
Il a été démontré que le graphène intercalé aux ions métalliques présente des propriétés supraconductrices. La plupart des métaux choisis pour l’intercalation sont des métaux alcalins et alcalino-terreux. Cette étude explore l’intercalation du graphène avec le nickel comme alternative plus respectueuse de l’environnement. En première étape, l’ionisation laser assistée par la matrice a été utilisée pour étudier la structure du dimère de coronène intercalé avec un atome de Ni. Les ions ont été formés par désorption laser à partir d’une cible contenant un mélange de coronène et de sel de Ni, l’ion dimère avec m/z 657 a été sélectionné, et le spectre de masse de dissociation induit par collision a été obtenu avec la technologie LIFT sur notre Bruker MALDI-TOF/TOF. Les résultats ont montré que le dimère se dissocie par transfert d’atome d’H d’une molécule coronène vers Ni. Cela était soutenu par des calculs de la fonction de densité de l’énergétique de réaction. Les résultats suggèrent que le processus de désorption laser conduit à un ion cluster mieux décrit comme un complexe ionique entre CorNiH et Cor-H, plutôt qu’un ion formel [(Cor)2Ni].
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