Dipolar recoupling in solid state NMR by phase alternating pulse sequences

We describe some new developments in the methodology of making heteronuclear and homonuclear recoupling experiments in solid state NMR insensitive to rf-inhomogeneity by phase alternating the irradiation on the spin system every rotor period. By incorporating delays of half rotor periods in the puls...

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Bibliographic Details
Published in:Journal of magnetic resonance (1997) 2009-04, Vol.197 (2), p.145-152
Main Authors: Lin, J., Bayro, M.J., Griffin, R.G., Khaneja, N.
Format: Article
Language:English
Subjects:
Algorithms
Dipolar recoupling
Magnetic Resonance Spectroscopy - methods
Magnetic Resonance Spectroscopy - statistics & numerical data
Phase alternating pulse sequences
Protons
Reproducibility of Results
rf-Inhomogeneity
Solid state NMR
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Summary:We describe some new developments in the methodology of making heteronuclear and homonuclear recoupling experiments in solid state NMR insensitive to rf-inhomogeneity by phase alternating the irradiation on the spin system every rotor period. By incorporating delays of half rotor periods in the pulse sequences, these phase alternating experiments can be made γ encoded. The proposed methodology is conceptually different from the standard methods of making recoupling experiments robust by the use of ramps and adiabatic pulses in the recoupling periods. We show how the concept of phase alternation can be incorporated in the design of homonuclear recoupling experiments that are both insensitive to chemical shift dispersion and rf-inhomogeneity.
ISSN:1090-7807
1096-0856
DOI:10.1016/j.jmr.2008.12.011