Fig. 6: Crystal structure of SD/Ag72c.

a The connections between [(PW₉O₃₄)₂@Ag₇₂] clusters in SD/Ag72c. PW₉O₃₄⁹⁻ is shown in space-filling mode. b The simplified 3D pcu framework with [(PW₉O₃₄)₂@Ag₇₂] as node (yellow balls) and pi-bipy as linker (green sticks).