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The D-HMQC MAS-NMR Technique

Authors
  • Tricot, Gregory
  • Trébosc, Julien
  • Pourpoint, Frédérique
  • Gauvin, Régis
  • Delevoye, Laurent1, 2
  • 1 LASIR, UMR-CNRS 8516, Université de Lille 1
  • 2 UCCS, UMR-CNRS 8181, Université de Lille 1
Type
Book
Journal
Annual Reports on NMR Spectroscopy
Publication Date
Jan 01, 2009
Volume
81
Pages
145–184
Identifiers
DOI: 10.1016/B978-0-12-800185-1.00004-8
ISBN: 978-0-12-800185-1
Source
Elsevier
Keywords
License
Unknown

Abstract

The D-HMQC (dipolar heteronuclear multiple-quantum coherence) technique is a recently developed NMR pulse sequence particularly suitable for the investigation of spatial proximity between quadrupolar and spin-1/2 nuclei. Compared to the cross-polarisation magic-angle spinning technique applied to a quadrupolar nucleus, D-HMQC does not require time-consuming optimisations and exhibits on the quadrupolar spin a better robustness to irradiation offset and to Cq values and radiofrequency field. Furthermore, the high robustness to irradiation offset makes of the D-HMQC sequence the technique of choice for the structural characterisation of materials especially at high magnetic field. We show here how the D-HMQC can be easily implemented and optimised to give access to the structural analysis of silicate-, phosphate-, carbon- and proton-containing materials. An emphasis will be on describing the most popular dipolar recoupling schemes that can be used in that sequence and providing their advantages and drawbacks.

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