Figure 1.

(A) Structural representations of the molecular entities used as building blocks. (A) γ-cyclodextrin C₄₈H₈₀O₄₀ (γ-CD) resulting from the condensation of eight glycopyranose units. The toroidal macrocycle presents two distinct faces, a smaller one delimited by 8 methoxy groups (primary) and a wider one (secondary) delimited by 16 hydroxyl groups. (B) The Preyssler anion [NaP₅W₃₀O₁₁₀]¹⁴⁻ with oblate spheroid shape presents two main (longitudinal) faces perpendicular to the virtual C₅ symmetry axis.