POSSIBILITIES FOR HIGH-RESOLUTION NUCLEAR MAGNETIC RESONANCE IN SOLIDS.
Abstract
The high-resolution nuclear magnetic resonance spectra observed in liquids have provided a powerful tool in structural analysis. Such spectra are not however normally observable with solid specimens because the fine features are overlaid by the magnetic dipolar interactions between the nuclei. We have shown that the dipolar broadening can be removed for solid specimens also by rapid rotation about an axis inclined at the angle 54 degrees 44 min to the applied field. The theory of the method is outlined, and the effect of rapid rotation on other sources of broadening is discussed: field inhomogeneity, quadrupolar broadening, chemical shift anisotropy, electron-coupled spin-spin interactions. Details are given of the experimental arrangement, and in particular of the air turbines used to obtain high rates of rotation in the magnet gap. The results are given of investigations of the P-31 spectra of phosphorus pentachloride, zinc phosphide, phosphorus sesquisulphide, tetraphosphorus pentasulphide, phosphorus pentasulphide and pyrophosphoric acid. A nuclear cross-relaxation effect, induced by specimen rotation, is reported for solid phosphorus pentachloride. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 31, 1963
- Accession Number
- AD0416297
Entities
People
- E. R. Andrew
Organizations
- University of Wales