Journal
CHEMICAL PHYSICS LETTERS
Volume 496, Issue 1-3, Pages 201-207Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2010.07.037
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Funding
- Region Nord/Pas de Calais
- Europe (FEDER)
- CNRS
- French Minister of Science
- USTL
- ENSCL
- Bruker BIOSPIN
- CortecNet
- TGE RMN THC [FR-3050]
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We present a new kind of NMR pulse sequences to observe heteronuclear correlation (HETCOR) specifically between spin-1/2 and spin-3/2 nuclei with isotropic resolution on the quadrupolar channel. These methods, called HMQC-ST, feature a STMAS filter during the evolution period of the HMQC scheme. Compared to existing HETCOR techniques involving quadrupolar nuclei, the HMQC-ST combines high-resolution and high efficiency and allows indirect detection of spin-3/2 nuclei via sensitive nuclei. We study analytically and using simulations how through-bond and through-space HMQC-ST perform compared to regular HMQC sequence. HMQC-ST potential is demonstrated experimentally by recording through-space HETCOR 2D spectra of Na2HPO4 and NaH2PO4. (C) 2010 Elsevier B.V. All rights reserved.
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