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Multiple-quantum cross polarization in quadrupolar spin systems during magic-angle spinning.

D Rovnyak·M Baldus·R G Griffin
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Abstract

We describe the concept of multiple-quantum cross polarization (CP) between an I = 32 and an I = 12 spin during magic-angle spinning. Experimental and theoretical results for (23)Na-(1)H pairs are presented that elucidate the transfer mechanism and the beneficial effect of adiabatic amplitude modulations of the CP field. The multiple-quantum CP approach is shown to be beneficial for improving the sensitivity of CP-MQMAS experiments and for detecting dipolar correlations.

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Magnetic Resonance SpectroscopyJournal ArticleResearch Support, Non-U.S. Gov'tResearch Support, U.S. Gov't, P.H.S.

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D Rovnyak, M Baldus, R G Griffin. 2000. Multiple-quantum cross polarization in quadrupolar spin systems during magic-angle spinning.. https://doi.org/10.1006/jmre.1999.1922

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