Science Advances· 2026Q1
Symmetry-based pulsed DNP and EPR sequences
- 0citations
- Q1SCImago
- 2026year
Short summary
Researchers adapted symmetry-based dipolar recoupling sequences from MAS NMR to static pulsed EPR and DNP, achieving effective polarization and distance measurements using phase-modulated microwave pulses synchronized with nuclear Larmor periods.
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Key points
- Adapted symmetry-based dipolar recoupling sequences from MAS NMR to static pulsed EPR and DNP.
- Used phase-modulated microwave pulses synchronized with nuclear Larmor periods.
- Achieved effective dynamic nuclear polarization and electron-nuclear distance measurements.
- Demonstrated consistency between experimental results, numerical simulations, and theory.
AI-generated from the title and abstract; the full text is not read.
Abstract
Pulsed microwave irradiation provides more versatile control over spin dynamics than continuous-wave (CW) methods. This study adapts symmetry-based dipolar recoupling sequences, which are originally designed for magic angle spinning (MAS) NMR, to exploit electron-nuclear interactions for dynamic nuclear polarization (DNP) and pulsed electron paramagnetic resonance (EPR). Using the trityl radical OX071 at X-band (0.35 tesla), phase-modulated microwave pulses were synchronized with the nuclear Larmor period. Experimental results show effective DNP performance and electron-nuclear distance measurements in EPR, consistent with numerical simulations and theory. This work shows that many MAS NMR pulse sequences can be adapted to static pulsed EPR and DNP with minor modifications. This cross-disciplinary approach provides a versatile platform for designing optimized, application-specific magnetic resonance methodologies across various field strengths, subject to instrumental capabilities.
The authors' abstract, as published at the source. Science Advances, 2026 · DOI ↗
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Field: Spectroscopy
SpectroscopyChemistry