Rotor synchronization of radiofrequency and gradient pulses in high-resolution magic angle spinning NMR |
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Authors: | Wieruszeski J M Montagne G Chessari G Rousselot-Pailley P Lippens G |
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Affiliation: | UMR 8525 CNRS, Institut de Biologie de Lille, Institut Pasteur de Lille, Université de Lille II, 1 rue du Professeur Calmette, 59021 Lille Cedex, France. |
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Abstract: | We have investigated the extent to which rotor synchronization of radiofrequency pulses leads to spectral improvement in high-resolution magic angle spinning NMR experiments. Several pulse sequences were tested, and the effect was found to be maximal in homonuclear TOCSY spectra. The physicochemical nature of the sample plays a role in the phenomenon, as rotor synchronization allows the refocusing of residual anisotropic interactions. However, even in a liquid sample the effects were visible. Radial inhomogeneities of the radiofrequency field were identified as an important source of the problem. |
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