Investigation of Coordination Polymers Based on Ligands of 2-cyano-pyridine Derivatives
|Keywords||hydrothermal synthesis coordination polymer topological structure 2-cyano-pyridine tetrazole|
Focusing on the current hot research topic of coordination polymer and supramolecular chemistry,2-cyano-pyridine derivatives were chosen as the building blocks to assembly with metal ions to afford novel topological supramolecular complexes. Based on their structural characterization and performance study, the potential relationship between structures and properties are primarily discussed with more emphasis on the influence of ligand structure and synthetic conditions on the resultant frameworks. Nine different supramolecular coordination complexes have been synthesized by using L1, L2, L3, L4 as building blocks(as shown in the following). The reaction of L1 with Cd(NO3)2·6H2O in different reaction conditions using hydrothermal method obtained two complexes [C48H32Cd2N8O18](1) and [C17H13CdN3O5](2) with different structural topology. Five novel coordination polymers [C3oH28N4O10Pb2] (3), [C3oH24N408Pb2](4), [C15H12N2O4Pb](5), [C15H16 N10O1.50Pb](6) and [C30H2gN4O10Pr](7) have been synthesized based on L3 and Pb(Ac)2 or PrCl3·7H2O by using different templet ligands. The fluorescent properties, thermal stability and the topological analysis of the above complexes were discussed systematically. As a multidentate carboxylic acid ligand, the reaction of L4 with Pb(Ac)2 or Cu(Ac)2 afford two new coordination polymers [C7H5ClNO4.50Pb] (8) and [C14H12N2O12Cu2] (9).