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Low-power broadband homonuclear dipolar recoupling without decoupling: Double-quantum C-13 NMR correlations at very fast magic-angle spinning
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK), Physical Chemistry.
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK), Physical Chemistry.
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK), Physical Chemistry.
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK), Physical Chemistry.
2012 (English)In: Chemical Physics Letters, ISSN 0009-2614, E-ISSN 1873-4448, Vol. 547, 103-109 p.Article in journal (Refereed) Published
Abstract [en]

We report novel symmetry-based radio-frequency (rf) pulse sequences for efficient excitation of doublequantum (2Q) coherences under very fast (>60 kHz) magic-angle spinning (MAS) conditions. The recursively generated pulse-scheme series, R2(2p)(1)R2(2P)(-1) (p = 1; 2, 3,...), offers broadband C-13-C-13 recoupling in organic solids at a very low rf power. No proton decoupling is required. A high-order average Hamiltonian theory analysis reveals a progressively enhanced resonance-offset compensation for increasing p, as verified both by numerical simulations and 2Q filtration NMR experiments on C-13(2)-glycine, [2,3-C-13(2)] alanine, and [U-C-13] tyrosine at 14.1 T and 66 kHz MAS, where the pulse schemes with p >= 3 compare favorably to current state-of-the-art recoupling options.

Place, publisher, year, edition, pages
2012. Vol. 547, 103-109 p.
National Category
Physical Chemistry
Identifiers
URN: urn:nbn:se:su:diva-81264DOI: 10.1016/j.cplett.2012.07.053ISI: 000308668500019OAI: oai:DiVA.org:su-81264DiVA: diva2:560578
Note

AuthorCount:4;

Available from: 2012-10-15 Created: 2012-10-15 Last updated: 2017-12-07Bibliographically approved

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Teymoori, GholamhasanPahari, BholanathStevensson, BaltzarEdén, Mattias
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