| DOI | Trouver le DOI : https://doi.org/10.1021/ja2081394 |
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| Auteur | Rechercher : Shin, K.1; Rechercher : Cha, M.; Rechercher : Lee, W.; Rechercher : Kim, H.; Rechercher : Jung, Y.; Rechercher : Dho, J.; Rechercher : Kim, J.; Rechercher : Lee, H. |
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| Affiliation | - Conseil national de recherches du Canada
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| Format | Texte, Article |
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| Sujet | Antiferromagnetics; Clathrate hydrate; Dioxygen molecules; Dioxygens; Environmental fields; Experimental approaches; Guest molecules; Host guest interactions; Hydrate cages; Inclusion compounds; Magnetic applications; Magnetic ions; Nitrogen-doped; Nonmagnetics; Novel materials; Orbitals; Spin couplings; Super-exchange coupling; Theoretical calculations; Water cage; Antiferromagnetism; Cobalt compounds; Hydration; Manganese oxide; Molecular oxygen; Hydrates; ammonia; clathrate hydrate; hydroxide; ion; manganese oxide; nitrogen; oxygen; unclassified drug; water; density functional theory; magnetism; oxidative coupling; spin coupling |
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| Résumé | Clathrate hydrates are a highly prospective material in energy and environmental fields, but the inherent nature of inclusion phenomena occurring in the stacked water cages has not been completely resolved yet. Investigating the magnetism of guest molecules is a new experimental approach in clathrate hydrate research to open the possibility of icy magnetic applications as a novel material as well as to understand the unrevealed host-guest interactions in icy inclusion compounds. In this study, we observed an indirect spin coupling between encaged dioxygen molecules via a nonmagnetic water framework through the measurement of guest magnetization. This spin coupling is reminiscent of superexchange coupling between magnetic ions through intervening oxygens in antiferromagnetic oxides, such as MnO and CoO. Theoretical calculations revealed that OH - incorporated in the framework induced the mixing of perpendicular π* orbitals of two distant dioxygens and that ammonia doping into the hydrate cage leads to a longer lifetime of that orientation. © 2011 American Chemical Society. |
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| Date de publication | 2011 |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro NPARC | 21271758 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | ebd215e2-c439-4d86-a0dd-e51c47e003f0 |
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| Enregistrement créé | 2014-03-24 |
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| Enregistrement modifié | 2020-04-21 |
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