Low-power broadband solid-state MAS NMR of 14 N

The Journal of Chemical Physics
Andrew J PellClare P Grey

Abstract

We propose two broadband pulse schemes for 14N solid-state magic-angle-spinning (MAS) nuclear magnetic resonance (NMR) that achieves (i) complete population inversion and (ii) efficient excitation of the double-quantum spectrum using low-power single-sideband-selective pulses. We give a comprehensive theoretical description of both schemes using a common framework that is based on the jolting-frame formalism of Caravatti et al. [J. Magn. Reson. 55, 88 (1983)]. This formalism is used to determine for the first time that we can obtain complete population inversion of 14N under low-power conditions, which we do here using single-sideband-selective adiabatic pulses. It is then used to predict that double-quantum coherences can be excited using low-power single-sideband-selective pulses. We then proceed to design a new experimental scheme for double-quantum excitation. The final double-quantum excitation pulse scheme is easily incorporated into other NMR experiments, as demonstrated here for double quantum-single quantum 14N correlation spectroscopy, and 1H-14N dipolar heteronuclear multiple-quantum correlation experiments. These pulses and irradiation schemes are evaluated numerically using simulations on single crystals and full p...Continue Reading

References

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Oct 21, 2011·The Journal of Chemical Physics·Andrew J PellLyndon Emsley
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Citations

Oct 24, 2019·The Journal of Chemical Physics·Ivan HungZhehong Gan
Aug 17, 2018·The Journal of Chemical Physics·Zhehong GanBingwen Hu
Jan 23, 2021·Journal of Magnetic Resonance·José P Carvalho, Andrew J Pell
Jan 23, 2019·Solid State Nuclear Magnetic Resonance·Frédéric A PerrasMarek Pruski
Apr 14, 2021·Magnetic Resonance in Chemistry : MRC·Mingji ZhengFeng Deng
May 21, 2021·Journal of Magnetic Resonance·Ivan Hung, Zhehong Gan

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