Population transfer HMQC for half-integer quadrupolar nuclei

The Journal of Chemical Physics
Qiang WangFeng Deng

Abstract

This work presents a detailed analysis of a recently proposed nuclear magnetic resonance method [Wang et al., Chem. Commun. 49(59), 6653-6655 (2013)] for accelerating heteronuclear coherence transfers involving half-integer spin quadrupolar nuclei by manipulating their satellite transitions. This method, called Population Transfer Heteronuclear Multiple Quantum Correlation (PT-HMQC), is investigated in details by combining theoretical analyses, numerical simulations, and experimental investigations. We find that compared to instant inversion or instant saturation, continuous saturation is the most practical strategy to accelerate coherence transfers on half-integer quadrupolar nuclei. We further demonstrate that this strategy is efficient to enhance the sensitivity of J-mediated heteronuclear correlation experiments between two half-integer quadrupolar isotopes (e.g., (27)Al-(17)O). In this case, the build-up is strongly affected by relaxation for small T2' and J coupling values, and shortening the mixing time makes a huge signal enhancement. Moreover, this concept of population transfer can also be applied to dipolar-mediated HMQC experiments. Indeed, on the AlPO4-14 sample, one still observes experimentally a 2-fold shortenin...Continue Reading

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Citations

Feb 6, 2017·Solid State Nuclear Magnetic Resonance·Shaohui XinFeng Deng
Aug 13, 2015·Physical Chemistry Chemical Physics : PCCP·Frédéric A PerrasMarek Pruski
Sep 12, 2020·Physical Chemistry Chemical Physics : PCCP·Amrit VenkateshAaron J Rossini
Dec 11, 2020·Magnetic Resonance in Chemistry : MRC·Hiroki NagashimaJean-Paul Amoureux
Apr 11, 2017·Solid State Nuclear Magnetic Resonance·Amrit VenkateshAaron J Rossini
Jul 31, 2019·Journal of Magnetic Resonance·Zhehong Gan
Dec 5, 2018·Journal of Magnetic Resonance·Frédéric A Perras, Marek Pruski
Apr 14, 2021·Magnetic Resonance in Chemistry : MRC·Mingji ZhengFeng Deng
May 9, 2021·Journal of Magnetic Resonance·Amrit VenkateshAaron J Rossini

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