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Cited by 73 publications
(64 citation statements)
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“…The spin‐3/2 nature of 23 Na implies that its MAS NMR responses are affected by second‐order quadrupolar interactions . Consequently, both the average isotropic chemical and quadrupolar shifts govern the 23 Na center‐of‐gravity shift (δCG) in the MAS NMR spectrum, whereas the peakwidth is dictated both by broadenings from second‐order quadrupolar interactions and distributions of isotropic chemical shifts, where the latter dominates in NMR spectra (Figure ) obtained at 14.1 T (Ref. 22).…”
Section: Resultsmentioning
confidence: 99%
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“…The spin‐3/2 nature of 23 Na implies that its MAS NMR responses are affected by second‐order quadrupolar interactions . Consequently, both the average isotropic chemical and quadrupolar shifts govern the 23 Na center‐of‐gravity shift (δCG) in the MAS NMR spectrum, whereas the peakwidth is dictated both by broadenings from second‐order quadrupolar interactions and distributions of isotropic chemical shifts, where the latter dominates in NMR spectra (Figure ) obtained at 14.1 T (Ref. 22).…”
Section: Resultsmentioning
confidence: 99%
“…8 and 24. Here CQη=CnormalQ1+η2/3, where CQ and η are the quadrupolar coupling constant and asymmetry parameter of the electric‐field gradient tensor, respectively . The 23 Na NMR spectra of the NCS/NCPS glasses were reproduced from Ref.…”
Section: Methodsmentioning
confidence: 99%
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“…Neat BF 3 •OEt 2 and a 1 M Al(NO 3 ) 3 aqueous solution were used for 11 B and 27 Al shift referencing, respectively, as well as for determining the nutation frequencies for 11 B (ν B ) and 27 Al (ν Al ) of all strong rf pulses. Note that nearly all parts of the experiments involved CT-selective pulses, where the CT nutation frequency is given by ν CT E ≈ (S + 1/2)ν E , with E ={Al, B} [10].…”
Section: Solid-state Nmr Experimentsmentioning
confidence: 99%
“…The engineering of rf-pulse sequences to achieve homonuclear dipolar recoupling among spins-1/2 (e.g., 1 H, 13 C, and 31 P) is well-developed [3][4][5][6][7], whereas it is exceedingly difficult to devise efficient and robust dipolar recoupling methods for half-integer spin quadrupolar nuclei [8,9], such as the 11 B (spin S = 3/2) and 27 Al (S = 5/2) nuclides considered herein. Underlying these problems is the necessity to solely observe and control the central transition (CT) of the quadrupolar nucleus [10], thereby requiring the lowest possible rf-field amplitudes ("rf power") to avoid NMR-signal leakages out to the satellite transitions (STs) during the dipolar recoupling, while it must also cope with large second-order broadenings (and chemical-shift dispersion for structurally disordered materials [2,10]). See refs.…”
Section: Introductionmentioning
confidence: 99%