Synthesis And Properties Of Bipyrazolate-Linked Metallo-Supramolecular Microcycles And One-Dimensional Coordination Polymer

Research on the functional coordination supramolecules or polymers is one of the interesting topics in the areas of coordination chemistry and materials science. First,a bipyrazolate-linked metallo-macrocyclic compound with bimetallic centers was synthesized through a metal-directed self-assembly approach involving spontaneous deprotonation of the (1,4-(3,3,5,5'-tetraphenyl-4,4'-bipyrazolyl)methyl)benzene ligand(Ph₄diPzPh)and 2,2'-bipyridine palladium nitrate in aqueous solution.The molecular structure of this compound was characterized by HNMR,ESI-MS,elemental analysis and the molecular structure modeling by using the CAChe 6.1.12.In addition,An one-dimenshional coordination polymer, {[Co(â…¡)(OOCH)₂(phen)(H₂O)]·H₂O}_n(1)(phen=1,10- phenanthroline),has been synthesized by solvo-thermal reaction.Single-crystal X-ray diffraction analysis shows that 1 is an one-dimensional formate-bridged(phen)Co(â…¡)helical chains,which is crystallized in non-centrosymmetric Pna2(1)space group of orthorhombic crystal system.The study of the temperature(2-300K)dependent magnetic susceptibility of 1 shows it corresponds to a typical shape of ferrimagnetic system.