Giant Cavity Macrocycle: Synthesis, Structure, and Its Complexation with Pagoda[5]arene

A novel stretched hexagon structure naphthalene diimides-extended-pillar[6]arene 1 with a giant cavity size of 18.769 & ANGS; in width and 17.109 & ANGS; in height is reported. 1 exhibits highly selectivebinding of pagoda[5]arene compared to pillar[5]arene and prism[5]arene.Size matching and charge transfer interactions play a key role inthe formation of the ring-in-ring stable complex.

Automated summary

A novel stretched hexagon structure of naphthalene diimides-extended-pillar[6]arene 1 with a large cavity is reported, showing selective binding of pagoda[5]arene over pillar[5]arene and prism[5]arene. Size matching and charge transfer interactions are crucial in the formation of the stable ring-in-ring complex.