Abstract
A new rotor-synchronized 2D magic angle spinning NMR method is presented is presented which, when applied to a partially ordered solid sample, gives information both on the molecular order and the spin dynamics. Sidebands due to dynamics in an isotropic sample are confined to a line parallel to one of the frequency axes, sidebands in a partially ordered solid in the absence of dynamics are confined to the diagonal of the 2D spectrum. Additional off-diagonal sidebands occur only if the corresponding residue is involved in both order and dynamics, which can therefore be correlated in heterogeneous systems. The method is demonstrated by observing the interchain spin exchange in samples of isotropic and highly oriented crystalline polyethylene.
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