From ultraslow to extremely fast dynamics in sodium nitrate

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dc.contributor.authorBeerwerth, Joachim
dc.contributor.authorSiegel, R.
dc.contributor.authorHoffmann, Lars
dc.contributor.authorPlaga, Lucie S.
dc.contributor.authorStorek, Michael
dc.contributor.authorBojer, B.
dc.contributor.authorSenker, J.
dc.contributor.authorHiller, Wolf
dc.contributor.authorBöhmer, Roland
dc.date.accessioned2021-04-06T10:49:47Z
dc.date.available2021-04-06T10:49:47Z
dc.date.issued2020-05-28
dc.description.abstractIncreasing dynamics in solids featuring nuclei subjected to second-order quadrupolar interactions lead to central-transition spectra that undergo two consecutive line-shaped transitions. Conventional motional narrowing occurs when the molecular exchange rate is on the order of the strength of the dominant interaction. In a second step, the resulting intermediately narrowed spectra change further when the motion becomes faster than the Larmor precession rate, leading to terminally narrowed spectra that can display a residual quadrupolar shift. We derive analytic expressions for this shift and analyze the quadrupolar central-transition spectra in terms of CN symmetrical cone models. Increasing the number of sites to N ≥ 3, the terminally narrowed spectra remain unaltered, while the intermediately narrowed spectra remain unaltered only for N ≥ 5. This finding relates to the different (cubic vs. icosahedral) symmetries that are required to average out the spatial second- and fourth-rank terms in the second-order quadrupolar interaction. Following recent work (Hung et al., Solid State Nucl Magn Reson 84:14–19, 2017), 17O NMR is applied to examine the three-site rotation of the nitrate group in NaNO3. Line shapes are measured and analyzed, and in addition to prior work, satellite-transition and stimulated-echo experiments are carried out. The final-state amplitudes extracted from the latter are reproduced using model calculations. It is shown how two-dimensional exchange spectra relating to N-site cone motions can be decomposed in terms of effective two-site-jump spectra. This latter approach is successfully tested for NaNO3.en
dc.identifier.urihttp://hdl.handle.net/2003/40134
dc.identifier.urihttp://dx.doi.org/10.17877/DE290R-22009
dc.language.isoende
dc.relation.ispartofseriesAppl Magn Reson;51
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subject.ddc530
dc.subject.rswkNMR-Spektroskopiede
dc.subject.rswkHamilton-Gleichungende
dc.subject.rswkSpin-Gitter-Relaxationde
dc.titleFrom ultraslow to extremely fast dynamics in sodium nitrateen
dc.title.alternativean 17O NMR studyen
dc.typeTextde
dc.type.publicationtypearticlede
dcterms.accessRightsopen access
eldorado.secondarypublicationtruede
eldorado.secondarypublication.primarycitationBeerwerth, J., Siegel, R., Hoffmann, L. et al. From Ultraslow to Extremely Fast Dynamics in Sodium Nitrate: an 17O NMR Study. Appl Magn Reson 51, 597–620 (2020).de
eldorado.secondarypublication.primaryidentifierhttps://doi.org/10.1007/s00723-020-01201-5de

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Experimentelle Physik III