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Multiple-Quantum Cross Polarization in Quadrupolar Spin Systems during Magic-Angle Spinning

✍ Scribed by David Rovnyak; Marc Baldus; Robert G Griffin

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
104 KB
Volume
142
Category
Article
ISSN
1090-7807

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✦ Synopsis

We describe the concept of multiple-quantum cross polarization (CP) between an I ‫؍‬ 3 2 and an I ‫؍‬ 1 2 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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