Two-Dimension Method for High Resolution Solids NMR Spectroscopy of Homonuclear Broadened Spins
Original Publication Date: 1984-Jan-01
Included in the Prior Art Database: 2005-Feb-02
A two-dimensional Fourier transform (FT) method can be used for obtaining high-resolution solids NMR spectra of abundant spins, such as 1-H, 19-F or 31-P, and quadrupole spins, such as 27-Al, 23-Na or 14-N. Previous and present methods for obtaining solids NMR spectra of these spins employ a multiple-pulse sequence with data sampling at specific points in the pulse train. An illustration of the present technique is shown in Fig. 1. The well known MREV-8-pulse sequence 1 is used for illustrative purposes. In the present method, the decay is digitized point-by-point in the windows following each 8-pulse period. A train 2 of RF pulses is also shown. Following each 8-pulse period, one point of the decay 3 is digitized, and so on. The first 8 points are labeled. A Fourier transform of this decay yields the NMR spectrum.