Abstract
We demonstrate a new resonance condition that obeys the relation Δδ=nνR/2, where Δδ is the chemical shift difference between two homonuclear-coupled spins, νR is the magic-angle spinning speed and n is an integer. This modulation on the rotational resonance recoupling condition is obtained by the application of rotor-synchronous 1H pulses when at least one proton is dipolar-coupled to one of the homonuclear spins. We suggest a new experimental scheme entitled ‘pulse induced resonance with angular dependent total enhancement’ (PIRATE) that can enhance proton-driven spin diffusion by the application of a single 1H pulse every rotor period. Experimental evidence is demonstrated on the two carbon spins of glycine and on the Y21M mutant of fd bacteriophage virus. Numerical simulations reveal the existence of the resonances and report on the important interactions governing these phenomena.
Original language | English |
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Article number | 107191 |
Journal | JOURNAL OF MAGNETIC RESONANCE |
Volume | 338 |
DOIs | |
State | Published - May 2022 |
Keywords
- Half rotational resonance
- Homonuclear correlations
- Magic-angle spinning
- Proton-driven spin diffusion
- Solid-state NMR
All Science Journal Classification (ASJC) codes
- Biophysics
- Biochemistry
- Nuclear and High Energy Physics
- Condensed Matter Physics