Fig. 4

Schematic image of symmetric oligomeric building blocks and example two-component assembled structure. A Illustration of point group symmetries. B Representative example of octahedral symmetry constructed by combining C3 trimer and C4 tetramer (left), p6 symmetry constructed by combining C3 trimer and C6 hexamer (middle), and p422 symmetry assembled by combining D2 tetramer and D4 octamer (right) (Image reprinted with permission from Ref [38])