1H NMR Relaxation in Urea
- Author(s): Taylor, Robert E
- Bacher, Alfred D
- Dybowski, C.
- et al.
Published Web Locationhttps://doi.org/10.1016/j.molstruc.2007.01.0143
Proton NMR spin-lattice relaxation times T1 were measured for urea as a function of temperature. An activation energy of 46.3 ± 4.7 kJ/mol was extracted and compared with the range of 38-65 kJ/mol previously reported in the literature as measured by different magnetic resonance techniques. In addition, proton NMR spin-lattice relaxation times in the rotating frame T1ρ were measured as a function of temperature. These measurements provide acquisition conditions for the 13C and 15N CP/MAS spectra of pure urea in the crystalline phase.
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