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Measurements of motionally averaged heteronuclear dipolar couplings in MAS NMR using R-type recoupling

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Zimmermann,  Herbert
Emeritus Group Biophysics, Max Planck Institute for Medical Research, Max Planck Society;

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Zitation

Dvinskikh, S. V., Zimmermann, H., Maliniak, A., & Sandström, D. (2004). Measurements of motionally averaged heteronuclear dipolar couplings in MAS NMR using R-type recoupling. Journal of Magnetic Resonance, 168(2), 194-201. doi:10.1016/j.jmr.2004.03.001.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-002A-1650-9
Zusammenfassung
A novel MAS NMR approach is presented for the determination of heteronuclear dipolar couplings in unoriented materials. The technique is based on the proton-detected local field (PDLF) protocol, and achieves dipolar recoupling by R-type radio-frequency irradiation. The experiment, which is called R-PDLF spectroscopy, is demonstrated on solid and liquid-crystalline systems. For mobile systems, it is shown that the R-PDLF scheme provides better dipolar resolution as compared to techniques combining conventional separated local field (SLF) spectroscopy with R-type recoupling.