Multiple-quantum magic-angle spinning NMR with cross-polarization: spectral editing of high-resolution spectra of quadrupolar nuclei.
An experiment is presented that combines the multiple-quantum magic-angle spinning (MQMAS) technique with cross-polarization (CP). As a preliminary test of this new method, we measured and compared the 27Al 3QMAS and 19F-->27Al CP 3QMAS spectra of a fluorinated AlPO4 aluminophosphate. Complete discrimination between the fluorinated and nonfluorinated Al sites was easily achieved, which demonstrates the usefulness of CP MQMAS for spectral editing. Future applications of this experiment will include other spin pairs and heteronuclear correlation NMR spectroscopy.
Pruski
M
M
Ames Laboratory, IA 50011, USA.
Lang
D P
DP
Fernandez
C
C
Amoureux
J P
JP
D009682:Magnetic Resonance Spectroscopy