Heteronuclear dipolar decoupling effects on multiple-quantum and satellite-transition magic-angle spinning NMR spectra

Magnetic Resonance in Chemistry : MRC
S GanapathyP K Madhu

Abstract

We here report on the influence of heteronuclear dipolar decoupling on the (27)Al 3QMAS, 5QMAS, and the double-quantum filter-satellite-transition magic-angle spinning (DQF-STMAS) spectra of a strongly dipolar-coupled system, gibbsite. The requirements for heteronuclear dipolar decoupling increase with the order of coherence evolving in the indirect dimension of a two-dimensional (2D) experiment. The isotropic line width of the high-resolution 2D spectra, in samples like gibbsite, is composed of four parts: the distribution of isotropic shifts (delta(ISO), delta(QIS)), the homogeneous broadening related to the proton-proton flip-flop terms, the (27)Al-(27)Al homonulcear dipolar couplings, and the (1)H-(27)Al heteronuclear dipolar couplings. It is shown that, even in the case of gibbsite, where a strong proton-proton bath exists, the main resolution limiting factor in these experiments resides in the (1)H-(27)Al dipolar interaction.

References

Nov 1, 1996·Journal of Magnetic Resonance. Series a·J P AmoureuxS Steuernagel
May 29, 1998·Solid State Nuclear Magnetic Resonance·J P Amoureux, C Fernandez
Jun 26, 2002·Journal of Magnetic Resonance·Clarisse HuguenardZhehong Gan
Sep 27, 2003·Journal of Magnetic Resonance·Hyung-Tae Kwak, Zhehong Gan
Feb 7, 2006·Journal of Magnetic Resonance·J P Amoureux, J Trébosc
Dec 13, 2006·Solid State Nuclear Magnetic Resonance·Julien TreboscZhehong Gan

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Citations

Jan 22, 2010·Journal of Magnetic Resonance·C Vinod ChandranThomas Bräuniger
May 30, 2009·Solid State Nuclear Magnetic Resonance·Anastasia VyalikhUlrich Scheler
Apr 4, 2009·Journal of Magnetic Resonance·Takafumi TakahashiKoji Saito
May 23, 2015·The Journal of Physical Chemistry. B·Vladimir K MichaelisRobert G Griffin

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