Self-Assembly And Magnetic Studies Of One-Dimensional Copper (â…¡) Coordination Polymer

As the development of supramolecular coordination chemistry and material science, the design and research of molecule-based magnets has become one of the most conspicuous topics in recent years. In present paper, two 1D coordination polymers had been synthesized, and the crystal structures of them had been studied. The characterization and magnetic property study of the complexes had been carried out by means of elemental analysis, infrared spectroscopy, X—ray diffraction, temperature dependence magnetic susceptibilities measurements, andso on.(1) The 4,4'—bipyridine bridged Schiff-base coordination polymer: one-demensional complex {[Cu(L)(4,4'-bpy)]·ClO₄}_n [L= 2-((2-hydroxyethylimino) methyl)phenol, bpy = 4,4'-bipyridine]. The result of single crystal X-ray diffraction shown that the crystal system of the complex belong to orthorahombic, Pbcn(60) space-group, and the cell parameter a = 1.31648(19) nm b = 1.21952(17) nm c = 2.5037(4) nm . N-(2-hydroxyethyl) salicylaldimine is coordinated in tridentate coordination mode. The coordinated atom of the ligand includes oxygen of hydroxybenzene, oxygen atom of hydroxyethyl, and nitrogen atom of imine. In the complex, Cu(â…¡) ions are connected by 4,4'-bipyridine bridging ligands and 1D zig-zag structure is formed. The result of temperature dependence magnetic susceptibilities measurements indicates that weak ferromagnetic coupling interaction exists between Cu(â…¡) ions, which are connected by 4,4'-bipyridine.(2) The azido-bridged Schiff-base coordination polymer: A novel one-demensional Cu(â…¡) ions coordination polymer with formula [Cu(L₁)(μ_1,1-N₃)]_n (L₁ = 2-(iminomethyl)phenol), had been prepared via in situ self-assembly. The result of single crystal X-ray diffraction shown that the crystal system of the complex belong to orthorahombic, Pccn(56) space-group, and the cell parameter a = 1.4319(3) nm b = 1.9465(4) nm c = 0.5761(1) nm . Compound consists of 1D uniform chains in which the Cu(â…¡) ions are bridged by EO-azide and oxygen of salicylidenimine(L₁). Magnetic susceptibility measurement reveals the existence of relatively strong ferromagnetic interactions in the 1D chain.