On the other hand, the intermolecular interaction of packed ligands inevitably affects the motional freedom i.e., the dynamic behavior of their chain segments. Studies show that, in polymers, the segments in crystalline phase may undergo correlated motion such as helical jumps and chain diffusion ; while the segments in amorphous phase undergo uncorrelated re-orientation and/or certain entangled motion . The amplitude and characteristics of these segmental motions could be captured by various NMR parameters such as relaxation, anisotropic lineshapes, or by multidimensional exchange spectroscopy . For instance, the analyses on quadrupolar patterns of H NMR and 1 H- C dipolar interaction offer quantitative measures of motional rate and amplitude of chain segments .