Dynamic nuclear polarization (DNP) increases NMR sensitivity by transferring polarization from electron to nuclear spins. Herein, we demonstrate that electron decoupling with chirped microwave pulses enables improved observation of DNP‐enhanced13C spins in direct dipolar contact with electron spins, thereby leading to an optimal delay between transients largely governed by relatively fast electron relaxation. We report the first measurement of electron longitudinal relaxation time (T1e) during magic angle spinning (MAS) NMR by observation of DNP‐enhanced NMR signals (T1e=40±6 ms, 40 m
Dynamic nuclear polarization (DNP) increases NMR sensitivity by transferring polarization from electron to nuclear spins. Herein, we demonstrate that electron decoupling with chirped microwave pulses enables improved observation of DNP‐enhanced13C spins in direct dipolar contact with electron spins, thereby leading to an optimal delay between transients largely governed by relatively fast electron relaxation. We report the first measurement of electron longitudinal relaxation time (T1e) during magic angle spinning (MAS) NMR by observation of DNP‐enhanced NMR signals (T1e=40±6 ms, 40 m
- NSF-PAR ID:
- 10102201
- Publisher / Repository:
- Wiley Blackwell (John Wiley & Sons)
- Date Published:
- Journal Name:
- Angewandte Chemie
- Volume:
- 131
- Issue:
- 22
- ISSN:
- 0044-8249
- Page Range / eLocation ID:
- p. 7337-7340
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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