Fig. 1
From: Ring shape-dependent self-sorting of pillar[n]arenes assembled on a surface

Cavity-shape-dependent self-sorting on a surface. a Chemical structures of cationic (P[5]+) and anionic (P[5]−) pillar[5]arenes, and cationic (P[6]+) and anionic (P[6]−) pillar[6]arenes. b Multilayer films can be constructed using pillar[n]arenes with the same ring combinations, but cannot with the different ring combinations