Quantification and compensation of the influence of pulse transients on symmetry-based recoupling sequences

Journal of Magnetic Resonance
Johannes J WittmannMatthias Ernst

Abstract

Deviations of amplitude and phase of radio-frequency pulses from the desired values, can have a severe impact on the performance of multiple-pulse sequences in NMR spectroscopy. A particular problem are pulse transients that appear every time there is a discontinuity in amplitude or phase. Based on a Floquet description using pulses with arbitrarily shaped amplitudes and phases we present a systematic study of the influence of pulse transients on symmetry-based pulse sequences in solid-state NMR under magic-angle spinning. This treatment explains the dependence of the experimentally observed transfer efficiency on the details of experimental setups. In addition, three approaches are compared which have the aim to re-establish highly efficient recoupling. We demonstrate that the application of transient-compensated pulses as basic elements of symmetry-based sequences leads to a significantly improved robustness of the experiments with respect to variations in the experimental setup.

References

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Apr 10, 2010·Journal of Magnetic Resonance·Y TabuchiM Kitagawa
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Jan 11, 2014·Journal of Midwifery & Women's Health·Joanna Bloomfield, Sharon Schindler Rising

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Citations

Jun 18, 2016·Journal of Magnetic Resonance·Joseph M Courtney, Chad M Rienstra
Jul 12, 2016·Solid State Nuclear Magnetic Resonance·Yusuke Nishiyama
Oct 16, 2016·Journal of Magnetic Resonance·W M J FranssenA P M Kentgens
Jan 1, 2018·Journal of Magnetic Resonance·Johannes HellwagnerMatthias Ernst

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