1887
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Decoupling and recoupling using continuous-wave irradiation in magic-angle-spinning solid-state NMR: A unified description using bimodal Floquet theory
Rent:
Rent this article for
USD
10.1063/1.1944291
/content/aip/journal/jcp/123/6/10.1063/1.1944291
http://aip.metastore.ingenta.com/content/aip/journal/jcp/123/6/10.1063/1.1944291
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Continuous-wave decoupling at a MAS frequency of . The plot shows the line intensity of the resonance in –glycine as a function of the rf-field amplitude. The measurements were carried out on a Bruker Avance 600 spectrometer using a noncommercial MAS probe. In order to obtain a good calibration of the rf-field strengths, the amplitude of the rf pulses was measured by attenuating the output of the amplifier and feeding it into the receiver of the NMR system. The obtained voltage was used as a measure of the rf-field strength after calibrating the voltage with respect to the nutation frequency at a few selected power levels.

Image of FIG. 2.
FIG. 2.

Numerical simulations of the cw decoupling efficiency in a three-spin -type system (×) and in a four-spin -type system (엯). The spinning frequency was set to . Only dipolar couplings were included in the simulations and all isotropic and anisotropic chemical shifts as well as all couplings were set to zero. The plot shows the line intensity calculated for a powder average with 300 crystallite orientations.

Image of FIG. 3.
FIG. 3.

Numerical simulations of the cw decoupling efficiency in a four-spin -type system around the resonance condition. The spinning frequency was set to . Only dipolar couplings were included in the simulations and all isotropic and anisotropic chemical shifts as well as all couplings were set to zero. The plot shows the line intensity calculated for a powder average with 300 crystallite orientations. One can clearly see that the resonance condition is shifted from the exact position due to the second-order isotropic dipolar shift.

Loading

Article metrics loading...

/content/aip/journal/jcp/123/6/10.1063/1.1944291
2005-08-12
2014-04-17
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Decoupling and recoupling using continuous-wave irradiation in magic-angle-spinning solid-state NMR: A unified description using bimodal Floquet theory
http://aip.metastore.ingenta.com/content/aip/journal/jcp/123/6/10.1063/1.1944291
10.1063/1.1944291
SEARCH_EXPAND_ITEM