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Indirectly detected satellite-transition quadrupolar NMR via progressive saturation of the proton reservoir

Wolf, Tamar ; Eden-Kossoy, Anna ; Frydman, Lucio

Solid state nuclear magnetic resonance, 2023-06, Vol.125, p.101862-101862, Article 101862 [Periódico revisado por pares]

Netherlands: Elsevier Inc

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  • Título:
    Indirectly detected satellite-transition quadrupolar NMR via progressive saturation of the proton reservoir
  • Autor: Wolf, Tamar ; Eden-Kossoy, Anna ; Frydman, Lucio
  • Assuntos: Adiabatic demagnetization ; Cross-polarization ; Dynamics ; Phase transition ; Quadrupolar nuclei ; Quadrupolar relaxation ; Solid state NMR
  • É parte de: Solid state nuclear magnetic resonance, 2023-06, Vol.125, p.101862-101862, Article 101862
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: Static satellite-transitions (ST) NMR line shapes from half-integer quadrupolar nuclei could be very informative: they can deliver insight about local motions over a wide range of timescales, and can report on small changes in the local electronic environments as reflected by variations in the quadrupolar parameters. Satellite transitions, however, are typically “invisible” for half-integer quadrupolar nuclei due to their sheer breadth, leading to low signal-to-noise ratio –especially for unreceptive low-gamma or dilute quadrupolar nuclei. Very recently we have introduced a method for enhancing the NMR sensitivity of unreceptive X nuclei in static solids dubbed PROgressive Saturation of the Proton Reservoir (PROSPR), which opens the possibility of magnifying the signals from such spins by repeatedly imprinting frequency-selective X-driven depolarizations on the much more sensitive 1H NMR signal. Here, we show that PROSPR's efficacy is high enough for enabling the detection of static ST NMR for challenging species like 35Cl, 33S and even 17O –all at natural-abundance. The ensuing ST-PROSPR NMR experiment thus opens new approaches to probe ultra-wideline (6–8 MHz wide) spectra. These highly pronounced anisotropies can in turn deliver new vistas about dynamic changes in solids, as here illustrated by tracking ST line shapes as a function of temperature during thermally-driven events. [Display omitted] •PROSPR is a new technique for enhancing the sensitivity of low-γ, dilute nuclei.•This is done by repeatedly depolarizing the 1H spin reservoir.•The experiment detects even broad satellite transitions of nuclei like 17O and 33S.•New opportunities to dynamic characterizations are opened by this experiment.
  • Editor: Netherlands: Elsevier Inc
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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