Vanadium-51 nuclear magnetic resonance (original) (raw)
Vanadium-51 nuclear magnetic resonance (51V NMR spectroscopy) is a method for the characterization of vanadium-containing compounds and materials. 51V comprises 99.75% of naturally occurring element. The nucleus is quadrupolar with I = 7/2, which is not favorable for NMR spectroscopy. The quadrupole moment is small, thus the linewidths are small. The magnetogyric ratio is relatively high (+7.0492 rad T−1s−1), such that 51V has 38% receptivity vs 1H. Its resonance frequency is close to that of 13C (gyromagnetic ratio = 6.728284 rad T−1s−1).
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| dbo:abstract | Vanadium-51 nuclear magnetic resonance (51V NMR spectroscopy) is a method for the characterization of vanadium-containing compounds and materials. 51V comprises 99.75% of naturally occurring element. The nucleus is quadrupolar with I = 7/2, which is not favorable for NMR spectroscopy. The quadrupole moment is small, thus the linewidths are small. The magnetogyric ratio is relatively high (+7.0492 rad T−1s−1), such that 51V has 38% receptivity vs 1H. Its resonance frequency is close to that of 13C (gyromagnetic ratio = 6.728284 rad T−1s−1). The chemical shift dispersion is great as illustrated by this series: 0 for VOCl3 (chemical shift standard), −309 for VOCl2(O-i-Pr), −506 VOCl(O-i-Pr)2, and −629 VO(O-i-Pr)3. For vanadates, the parent orthovanadate and its conjugate acid absorb at −541 ([VO4]3-) and 534 ([HVO4]2-). For decavanadate, three shifts are observed in accord with the number of nonequivalent sites: −422, −502, −519. (en) |
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| dbo:wikiPageWikiLink | dbc:Nuclear_magnetic_resonance dbc:Vanadium dbr:Nuclear_magnetic_resonance_spectroscopy dbr:Magnetogyric_ratio dbr:Orthovanadate dbr:Decavanadate |
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| rdfs:comment | Vanadium-51 nuclear magnetic resonance (51V NMR spectroscopy) is a method for the characterization of vanadium-containing compounds and materials. 51V comprises 99.75% of naturally occurring element. The nucleus is quadrupolar with I = 7/2, which is not favorable for NMR spectroscopy. The quadrupole moment is small, thus the linewidths are small. The magnetogyric ratio is relatively high (+7.0492 rad T−1s−1), such that 51V has 38% receptivity vs 1H. Its resonance frequency is close to that of 13C (gyromagnetic ratio = 6.728284 rad T−1s−1). (en) |
| rdfs:label | Vanadium-51 nuclear magnetic resonance (en) |
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| is foaf:primaryTopic of | wikipedia-en:Vanadium-51_nuclear_magnetic_resonance |