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Nagashima H, Lilly Thankamony AS, Trébosc J, Montagne L, Kerven G, Amoureux JP, Lafon O. Observation of proximities between spin-1/2 and quadrupolar nuclei in solids: Improved robustness to chemical shielding using adiabatic symmetry-based recoupling. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2018; 94:7-19. [PMID: 30103084 DOI: 10.1016/j.ssnmr.2018.07.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 07/17/2018] [Accepted: 07/17/2018] [Indexed: 06/08/2023]
Abstract
We introduce a novel heteronuclear dipolar recoupling based on the R21-1 symmetry, which uses the tanh/tan (tt) shaped pulse as a basic inversion element and is denoted R21-1(tt). Using first-order average Hamiltonian theory, we show that this sequence is non-γ-encoded and that it reintroduces the |m| = 1 spatial component of the Chemical Shift Anisotropy (CSA) of the irradiated isotope and its heteronuclear dipolar interactions. Using numerical simulations and one-dimensional (1D) 27Al-{31P} through-space D-HMQC (Dipolar Heteronuclear Multiple-Quantum Correlation) experiments on VPI-5, we compare the performances of this recoupling to those of other non-γ-encoded |m| = 1 heteronuclear recoupling schemes: REDOR (Rotational-Echo DOuble Resonance), SFAM (Simultaneous Frequency and Amplitude Modulation) and R42-1(tt). Such comparison indicates that the R21-1(tt) scheme is more robust to CSA, offset and radiofrequency field inhomogeneities than the other schemes. We take advantage of the high robustness of R21-1(tt) to CSA and offset to demonstrate the possibility to correlate the signals of 207Pb isotope with those of neighboring half-integer spin quadrupolar nuclei. Such approach is demonstrated experimentally by acquiring 11B-{207Pb} D-HMQC 2D spectra of Pb4O(BO3)2 crystalline powder.
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Affiliation(s)
- Hiroki Nagashima
- Univ. Lille, CNRS-8181, UCCS-Unit of Catalysis and Chemistry of Solids, F-59000, Lille, France; Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8565, Japan
| | | | - Julien Trébosc
- Univ. Lille, CNRS-8181, UCCS-Unit of Catalysis and Chemistry of Solids, F-59000, Lille, France
| | - Lionel Montagne
- Univ. Lille, CNRS-8181, UCCS-Unit of Catalysis and Chemistry of Solids, F-59000, Lille, France
| | - Gwendal Kerven
- Univ. Lorraine, CNRS-7036, CRM2, F-54506, Vandœuvre-lès-Nancy, France
| | - Jean-Paul Amoureux
- Univ. Lille, CNRS-8181, UCCS-Unit of Catalysis and Chemistry of Solids, F-59000, Lille, France; Bruker Biospin, 34 rue de l'industrie, F-67166, Wissembourg, France.
| | - Olivier Lafon
- Univ. Lille, CNRS-8181, UCCS-Unit of Catalysis and Chemistry of Solids, F-59000, Lille, France; Institut Universitaire de France, 1 rue Descartes, F-75231, Paris, France.
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Herbst C, Riedel K, Leppert J, Ohlenschläger O, Görlach M, Ramachandran R. 13C-13C chemical shift correlation in rotating solids without 1H decoupling during mixing. Chemphyschem 2007; 8:1770-3. [PMID: 17665381 DOI: 10.1002/cphc.200700234] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Christian Herbst
- Molecular Biophysics/NMR spectroscopy Leibniz Institute for Age Research, Fritz Lipmann Institute, Beutenbergstrasse 11, 07745 Jena, Germany
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Riedel K, Herbst C, Leppert J, Ohlenschläger O, Görlach M, Ramachandran R. Broadband homonuclear chemical shift correlation at high MAS frequencies: a study of tanh/tan adiabatic RF pulse schemes without 1H decoupling during mixing. JOURNAL OF BIOMOLECULAR NMR 2007; 37:277-86. [PMID: 17288003 DOI: 10.1007/s10858-006-9137-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2006] [Accepted: 12/11/2006] [Indexed: 05/13/2023]
Abstract
At high magic angle spinning (MAS) frequencies the potential of tanh/tan adiabatic RF pulse schemes for 13C chemical shift correlation without 1H decoupling during mixing has been evaluated. It is shown via numerical simulations that a continuous train of adiabatic 13C inversion pulses applied at high RF field strengths leads to efficient broadband heteronuclear decoupling. It is demonstrated that this can be exploited effectively for generating through-bond and through-space, including double-quantum, correlation spectra of biological systems at high magnetic fields and spinning speeds with no 1H decoupling applied during the mixing period. Experiments carried out on a polycrystalline sample of histidine clearly suggest that an improved signal to noise ratio can be realised by eliminating 1H decoupling during mixing.
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Affiliation(s)
- Kerstin Riedel
- Research Group Molecular Biophysics/NMR Spectroscopy, Leibniz Institute for Age Research, Fritz Lipmann Institute, 07745 Jena, Germany
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Kervern G, Pintacuda G, Emsley L. Fast adiabatic pulses for solid-state NMR of paramagnetic systems. Chem Phys Lett 2007. [DOI: 10.1016/j.cplett.2006.12.056] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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