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High Magnetic Field Consequences on the NMR Hyperfine Shifts in Solution

โœ Scribed by Ivano Bertini; Isabella C. Felli; Claudio Luchinat

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
132 KB
Volume
134
Category
Article
ISSN
1090-7807

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โœฆ Synopsis

Pseudocontact shifts arise from the isotropic reorientational average of the dipolar coupling between unpaired electron and nuclei, in the presence of magnetic susceptibility anisotropy. The effect of residual orientation due to high magnetic fields on pseudocontact shifts is evaluated here. The effect is found to be smaller and of opposite sign with respect to another novel effect of high magnetic fields on hyperfine shifts due to saturation of the electron spin magnetic moment as described by the Brillouin equation.

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โœ Paul T. Callaghan; Michal E. Komlosh; Magnus Nyden ๐Ÿ“‚ Article ๐Ÿ“… 1998 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 289 KB

A description is given of pulsed gradient spin echo (PGSE) NMR experiments in which large pulsed magnetic field gradients may be required. The design contraints are discussed and, in particular, the problem of the use of large pulsed magnetic field gradients in conjunction with large polarizing fiel