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A combined 17O RAPT and MQ-MAS NMR study of L-leucine

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Zimmermann,  Herbert
Department of Biomolecular Mechanisms, Max Planck Institute for Medical Research, Max Planck Society;

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Citation

Prasad, S., Clark, T. M., Sharma, R., Kwak, H.-T., Grandinetti, P. J., & Zimmermann, H. (2006). A combined 17O RAPT and MQ-MAS NMR study of L-leucine. Solid State Nuclear Magnetic Resonance, 29(1-3), 119-124. doi:10.1016/j.ssnmr.2005.10.007.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002A-EE2B-B
Abstract
We report the application of rotor-assisted population transfer (RAPT) to measure the quadrupolar coupling constant (C(q)) for spin 5/2 nuclei. Results from numerical simulations are presented on the magnitude of enhancement factor as a function of frequency offsets, i.e. the RAPT profile. Experimental O17 RAPT profile is traced for the amino acid L-leucine. In addition, results from MQ-MAS experiments are incorporated to determine the quadrupolar asymmetry parameter (eta(q)). Unlike previous reports, the O17 NMR parameters for an amino acid, L-leucine, is reported at a relatively low field of 9.4 T.