Synthesis and characterization of a praseodymium-adipate framework templated with 1,2-bis(4-pyridyl)ethane: Host-guest interactions and structural survey

摘要

A new templated metal-organic framework has been synthesized and characterized: [Pr-2(C6H8P4)(3)(H2O)(2)center dot(C12H12N2). This structure represents the completion of a series of lanthanide-adipate metal-organic framework materials that have been templated with 4,4'-bipyridine-derived template molecules. Host-guest interactions have been qualitatively analyzed within this system along with previously templated systems. On the basis of these observations, a series of guidelines have been established to predict template occlusion. These guidelines include hard-soft acid-base considerations, hydrophobic-hydrophilic interactions, hydrogen bonding, and geometric considerations. These criteria may aide in the future utilization of templates in the topological control of metal-organic frameworks.