Ten anionic pseudo-polymorphic Zr(IV)-ellagate MOFs were synthesized using ten different amines as organic structuredirecting agents (OSDAs) under otherwise identical reaction conditions. Each MOF has a unique structural profile with one of various possible topologies, inorganic building units, Zr(IV) coordination numbers, intermolecular framework interactions, pore size, and dimensionality. These structural differences, as well as the differences in the chemical properties of the OSDAs, resulted in different physical and chemical properties of the MOFs such as hydrophobicity/hydrophilicity, and rigid or dynamic frameworks. In particular, π-π interactions within the frameworks appear to govern the stability of these MOFs. By further changing the species of the OSDA, we envision that a plethora of other MOFs could potentially be synthesized within this zirconium ellagate system alone, considering the predicted possibility of numerous other 7-and 8-coordinated Zr(EA)4 isomers that are yet to be observed. Other potential SDAs may include other amines or ammonium species that