| DOI | Resolve DOI: https://doi.org/10.1021/ja049577x |
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| Author | Search for: Moudrakovski, Igor1; Search for: Wang, L-Q; Search for: Baumann, T.; Search for: Satcher, J.; Search for: Exarhos, G.; Search for: Ratcliffe, Christopher1; Search for: Ripmeester, John1 |
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| Affiliation | - National Research Council of Canada. NRC Steacie Institute for Molecular Sciences
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| Format | Text, Article |
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| Abstract | 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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| Publication date | 2004-04-28 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 12329154 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | a588b5d5-2910-41c8-a243-c00738841174 |
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| Record created | 2009-09-10 |
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| Record modified | 2020-04-17 |
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