title: Rotational echo double resonance without proton decoupling under fast spinning condition.
abstract: 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.
authors.affiliation: Department of Chemistry, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei, Taiwan.
authors.forename: Fang-Chieh
authors.initials: FC
authors.lastname: Chou
authors.forename: Tim W T
authors.initials: TW
authors.lastname: Tsai
authors.forename: Jerry C C
authors.initials: JC
authors.lastname: Chan
mesh_terms: 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
chemical_list: D005998:Glycine; D011522:Protons; D000097797:Glyphosate