NMR Relaxation of the methyl protons in the presence of chemical exchange
โ Scribed by D. Pumpernik; A. Azman
- Publisher
- Elsevier Science
- Year
- 1977
- Weight
- 270 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0378-4487
No coin nor oath required. For personal study only.
โฆ Synopsis
The calculation of longitudinal nuclear magnetic relaxation for an internally rotating methyl group attached to a symmetric top molecule has been extended taking into account the chemical exchange between two kinds of'sites in the solution. The deviations from a simple exponantial decay depends strongly on the anisotropy of reorientations at two sites and the exchange rate,
๐ SIMILAR VOLUMES
## Synopsis The results of semiselective 'H-nmr inversion recovery experiments on mnicated calf thymus DNA fragments are reported. The measurements were conducted in aqueous solutions containing 85% D20, in order to reduce the dipolar contribution to the observed relaxation rates. In solutions con
The effect of reorientational mobon on the amplwde of the proton NMR sobd echo response loll-g a resonanl ## P,(90ยฐ)-T-Px(900) pulse sequence for polycrystallme be-e 1.2,3.4-d, has beeen measured as a function of temperature The results are compared wth those of a theoretical model of Isolated &p