Simple routes to supramolecular squares with ligand corners:1:1 AgI:pyrimidine cationic tetranuclear assemblies

Simple, tetranuclear cationic supramolecular squares with ligands at the corners can be constructed using the geometry of the pyrimidine ligand and the directional tendencies of AgI coordination; the 1:1 AgI:pyrimidine squares have an open channel structure which facilitates selective ion exchange of pertechnetate over nitrate.