Fig. 2: Solid-state (super)structure of TPACage•6Cl.

a–b Capped-stick and space-filling representations of side-on views, showing the volume and dimensions of the cavity inside TPACage⁶⁺. c A cut-away space-filling plan view of the cavity inside TPACage⁶⁺, showing that its diameter is 20.8 Å. d Capped-stick and space-filling representations of different views, showing the [π···π] stacking interaction between two adjacent cages and the [C−H···Cl⁻] hydrogen bonding between TPACage⁶⁺ and Cl⁻ anions. e–f The solid-state superstructure of TPACage•6Cl, revealing how TPACage⁶⁺ assembles into a 3D framework with relatively large 1D channels with diameter of 25.0 Å. Solvent molecules have been omitted for the sake of clarity. C skyblue and red, H white, N blue, Cl green.