“…Static (non-spinning) NMR line shapes are broadened by homonuclear and heteronuclear dipolar couplings between different nuclei, quadrupolar couplings (for spin I > ½), chemical shielding anisotropy, or chemical shift dispersions, thus providing a handle to probe local structures and dynamics. For example, 7 Li, 23 Na, 31 P, and 133 Cs NMR M 2 results have been reported for glasses in analyses of structures and ion dynamics [ 8 , 9 , 10 , 11 , 12 ], as well as 1 H NMR M 2 studies of dynamics, miscibility, and chain orientations in polymers [ 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ]. While static NMR is hampered by low spectral resolution, it does benefit from being sensitive to local motions on the order of the line width and can be employed over very wide temperatures ranges.…”