WSOLIDS1: Static: Dipolar-chemical shift (A2, AX) [ Go Home ]

This squeezed picture shows an example for the succesful simulation of a spectrum arising from the combined effect of chemical shift anisotropy and homonuclear dipolar coupling in a powder sample. It is the ³¹P NMR spectrum of tetraethyl diphosphine disulfide, shown as absorption and first derivative spectrum, and the results have been published in:

K. Eichele, G. Wu, R. E. Wasylishen, J. F. Britten:
Phosphorus-31 NMR Studies of Solid Tetraethyldiphosphine Disulfide. A Reinvestigation of the ³¹P,³¹P Spin-Spin Coupling Tensor.
J. Phys. Chem. 1995, 99, 1030-1037.

Click on the picture to have a better look.

Background

In addition to the chemical shift anisotropy (CSA), the spectrum of a spin pair will also depend on the direct dipolar coupling and potentially the indirect spin-spin coupling between both nuclei. Because both, the CSA and dipolar interaction, are tensorial interactions, the actual line shape also depends on their relative orientation.

[ Go Home ] | last modified: 16.08.2001