Quantitative comparisons are made easier as we represent the relative fractions of different mobility as colored bars (Figure ). The schematic models are also drawn in Figure for NCs with pure C14, pure C22 or mixed C14+C22 ligands. As we can see, for systems with pure C14 or C22 ligands, the outer ~5 CD2 units are free, the middle 5 ~ 6 units are in tgg rotation mode, while the rest are rigid. There is a dramatic increase of flexibility for the C22 ligands when they are mixed with C14 on mixed-ligand NCs: the outer 14 CD2 units of C22 ligands become free. Meanwhile, there is also a slight increase of flexibility for the C14 ligands on the mixed-ligand NCs: the outer 7 CD2 units of C14 ligands become free.