Designed Assemblies in Open Framework Materials Synthesis: An Interrupted Sodalite and An Expanded Sodalite

Structure-directing hydrogen bonding, the molecular symmetry of the guest, and charge matching between host and guest are used to assemble four-ring units into sodalite-type cage assemblies with the imposition of the molecular symmetry of the template (guest) onto the final framework structure. Variable charge matching with PPZ+ or PPZ2+ (mono- and diprotonated piperazine, respectively) is shown to give interrupted and expanded sodalite-type zincophosphate structures (shown on the right).