Rotor synchronized cross polarization of solid state NMR

Details Rotor synchronized cross polarization of solid state NMR Rotor synchronized cross polarization of solid state NMR

1990-07-19

1992-12-08

Arana, Louis

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324321, G01V 300

Patent

active

051701200

ABSTRACT:
The cross polarization condition for hetero-coupled NMR spectroscopic investigations for a sample spinning at rate .omega..sub.R is improved by causing at least one of the RF excitation channels to emit pulses in synchronous relationship to the sample spinner during the cross polarization contact whereby dependence of the NMR signal on mechanical spin rate .omega..sub.R is reduced.

REFERENCES:
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patent: 4305036 (1981-12-01), Ernst et al.
patent: 4628263 (1986-12-01), Kid
patent: 4996483 (1991-02-01), Beer et al.
Yarim-Agaev et al., "Sample Spinning at the Magic Angle With Rotation-Synchronized rf Pulses", Journal of Magnetic Resonance, vol. 47 (1982), pp. 51-60.
Ziegler et al., "The Stop-and-Go Spinning Technique in MAS Experiments", Journal of Magnetic Resonance, vol. 79, (1988) pp. 299-306.
Levitt et al., "Spin Dynamics and Thermodynamics in Solid-State NMR Cross Polarization", Journal of Chem. Physics, vol. 84, (1986), pp. 4243-4255.
N. C. Nielsen et al. "Toss in High-Speed MAS NMR" Journal of Magnetic Resonance, vol. 80, No. 1, Oct. 15, 1988, pp. 149-154.
Y. Ogura et al. "A New Method for Static Imaging of a Rotating Object", Journal of Magnetic Resonance, vol. 83, No. 1, Jun. 1989, pp. 177-182.

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