| DOI | Trouver le DOI : https://doi.org/10.1021/ja049577x |
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| Auteur | Rechercher : Moudrakovski, Igor1; Rechercher : Wang, L-Q; Rechercher : Baumann, T.; Rechercher : Satcher, J.; Rechercher : Exarhos, G.; Rechercher : Ratcliffe, Christopher1; Rechercher : Ripmeester, John1 |
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| Affiliation | - Conseil national de recherches du Canada. Institut Steacie des sciences moléculaires du CNRC
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| Format | Texte, Article |
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| Résumé | Hyperpolarized (HP) 129Xe NMR was used for the first time to probe the geometry and interconnectivity of pores in RF aerogels and to correlate them with the [resorcinol]/[catalyst] (R/C) ratio. We have demonstrated that HP 129Xe NMR is an ideal method for accurately measuring the volume-to-surface-area (Vg/S) ratios for soft mesoporous materials without using any geometric models. The Vg/S parameter, which is related both to the geometry and the interconnectivity of the porous space, has been found to correlate strongly with the R/C ratio and exhibits an unusually large span: an increase in the R/C ratio from 50 to 500 results in about 5-fold rise in Vg/S. Unlike conventional techniques, HP 129Xe NMR spectroscopy probes the geometry and interconnectivity of the nano- or mesopores in soft materials, providing new insights into the pore structure. |
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| Date de publication | 2004-04-28 |
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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 | 12329154 |
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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 | a588b5d5-2910-41c8-a243-c00738841174 |
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| Enregistrement créé | 2009-09-10 |
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| Enregistrement modifié | 2020-04-17 |
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