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Published on: November 2, 2018
Enhanced sensitivity in RIACT/MQ-MAS NMR experiments using rotor assisted population transfer
1Department of Chemistry, Ohio State University, Columbus, Ohio 43210-1173, USA.
Abstract:
The rotor assisted population transfer (RAPT) sequence is used to enhance the sensitivity of the RIACT(II) experiment for spin-3/2 quadrupolar nuclei. A detailed theoretical analysis of the polarizations that contribute to different types of MQ-MAS experiments is provided. In particular, two polarization pathways are distinguished for the creation of triple-quantum coherence. The existence of these pathways is experimentally demonstrated by comparing the sensitivities of different sequences with and without RAPT preparation.
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