Combining coordination and supramolecular chemistry to explore uranyl assembly in the solid state

摘要: The syntheses and crystal structures of twelve new compounds containing the UO22+ cation, a bromo-substituted benzoic acid linker (m-bromo-, p-bromo, or 3,5-dibromobenzoic acid) chelating N-donor (1,10-phenanthroline, 2,2′:6′,2′′-terpyridine, 4′-chloro-2,2′:6′,2′′-terpyridine) are reported. Single X-ray diffraction analyses these materials allowed for exploration structural relationship between acids N-donor, as well influence pH on uranyl speciation. At an unadjusted (∼3) mix monomers dimers observed whereas at higher (5–6) usually produced with tetramers also observed. A systematic study supramolecular interactions present in was executed by varying bromine position groups along substituents N-donor. Assembly via halogen hydrogen bonding π–π interactions, including four instances oxo-functionalization bonding, depending experimental conditions utilized.