Nuclear magnetic resonance spectroscopy

Details Nuclear magnetic resonance spectroscopy Nuclear magnetic resonance spectroscopy

1990-09-04

1992-03-24

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324300, 324322, G01R 3320

Patent

active

050992066

ABSTRACT:
There is disclosed high-resolution NMR spectroscopy in solids. Magic angle spinning and cross polarization are used in conjunction. The sample is rotated by a spinner at a high speed about an axis oriented at the magic angle 54.degree.44' with respect to the static magnetic field. Under this condition, a 90.degree. pulse is applied to abundant nuclear species, such as .sup.1 H that is coupled to dilute nuclear species, such as .sup.13 C. Then, a spin-locking pulse or pulse sequence is applied to the abundant nuclear species. An observing pulse or pulse sequence is applied to the dilute nuclear species. The free induction decay signal from the dilute nuclear species is detected. The spin-locking pulse or the observing pulse is amplitude-modulated at a low frequency.

REFERENCES:
patent: 4511841 (1985-04-01), Bartuska et al.
patent: 4875486 (1989-10-01), Rapoport et al.
patent: 4899111 (1990-02-01), Pines et al.
patent: 4968938 (1990-11-01), Pines et al.
patent: 4968939 (1990-11-01), Pines et al.
patent: 4996483 (1991-02-01), Beer et al.

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