Rotational echo double resonance without proton decoupling under fast spinning condition.
We show that rotational echo double resonance (REDOR) experiments can be carried out without proton decoupling under the conditions of fast spinning and strong rf field. Numerical simulations on a five-spin systems show that no significant attenuation of the reference signal (S(0)) is observed at a spin rate of 25 kHz, provided that the rf power is larger than 100 kHz. This approach has been validated by (31)P{(13)C} REDOR measurements on isotopically labeled glyphosate. The obtained van Vleck's second moment is in favorable agreement with the value calculated based on the crystal structure.
Chou
Fang-Chieh
FC
Department of Chemistry, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei, Taiwan.
Tsai
Tim W T
TW
Chan
Jerry C C
JC
D018360:Crystallography, X-Ray; D005998:Glycine / Q000031:analogs & derivatives / Q000737:chemistry; D007700:Kinetics; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008958:Models, Molecular; D008968:Molecular Conformation; D011522:Protons; D015203:Reproducibility of Results; D012399:Rotation; D000097797:Glyphosate
D005998:Glycine; D011522:Protons; D000097797:Glyphosate