Influence of Proton Chemical-Shift Anisotropy on Magic-Angle Spinning Spectra of Hydrate Crystals
β Scribed by Piotr Tekely; Pascal Palmas; Pierre Mutzenhardt
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 87 KB
- Volume
- 127
- Category
- Article
- ISSN
- 1090-7807
No coin nor oath required. For personal study only.
β¦ Synopsis
It is shown that the proton chemical-shift anisotropy of hydrate crystals affect dipolar powder pattern at 7.0 T. This may be clearly observed via an asymmetric envelope of dipolar spinning sidebands in magic-angle spinning proton spectra.
π SIMILAR VOLUMES
## Abstract Magicβangle spinning (MAS) has recently been shown to enhance spectral resolution in NMR examinations of intact biological tissue ex vivo. This work demonstrates that freezing certain tissue samples before examination by ^1^H MAS NMR can have a marked effect on their spectra. Spectra of
A robust magic-angle-spinning experiment for separating undistorted, quasi-static chemical-shift powder patterns is presented. It is derived from the technique of R. Tycko, G. Dabbagh, and P. Mirau (1989, J. Magn. Reson. 85, 265), but uses 360 β’ instead of 180 β’ pulses. In combination with a suitabl
The dynamics of the liquid crystal director in "near magic angle" sample spinning has been investigated in mesophases with positive and negative diamagnetic susceptibility anisotropies and their mixtures with near-zero macroscopic diamagnetic anisotropy. To this end the deuteron quadrupolar splittin
## Abstract A simple procedure is presented for the determination of the asymmetry parameter of the electric field gradient, the quadrupole coupling constant, the secondβorder quadrupolar shift and the isotropic chemical shift of quadrupolar nuclei with halfβinteger spin directly from the experimen