Chemical-shift anisotropy solids, line-shape effects

Figure 3 Characteristic solid state NMR line shapes, dominated by the chemical shift anisotropy. The spatial distribution of the chemical shift is assumed to be spherically symmetric (a), axially symmetric (b), and completely asymmetric (c). The top trace shows theoretical line shapes, while the bottom trace shows rear spectra influenced by broadening effects due to dipole-dipole couplings.

P line shapes have been used to study the motion of a phosphate ester in BPA-PC and in a blend of PS and PPO [753,754]. One-dimensional solid echo P chemical shift anisotropy line shapes are an effective means of determining rate and amplitude of ester motion. P Hahn echo spectra of 5 to 20 wt.% tris(2-ethylhexyl)phosphate (TEHP) in tetramethylpolycarbonate (TMBPA-PC) were the basis of a study of diluent dynamics [755]. 

---