Synthesis And Performance Of The Coordination Complexes Based On Carboxylic And Pyridine

Coordination compounds draw considerable attention for their fascinating structures and potential applications as functional materials. Complexes with attractive topologies and particular properties such as magnetic, optical and adsorbing properties are reported continuously. The primary consideration is the choice of ligand and the coordination geometry of the metal, for the main properties is determined by the structure of coordination compound. In this paper, every coordination compounds were constructed successfully by the solvothermal method. The coordination mode and magnetic properties has been described. The main contents are summarized as follows:1. Six coordination compounds（1-6） were synthesized by transition or rare earth metal ions as spin carriers and ligands such as 4-（4-Pyridyl）benzoic acid, 4, 4’-Biphenyldicarboxylic acid, 2, 2’-Bipyridine-4, 4’-dicarboxylic acid, Phenylsuccinic acid. [Co₈（OMe）₆（HCO₂）₄（L）₆]_n,（L=4-（pyridine-4-yl）benzolate）（1） is a single-chain magnet with weak ferromagnetic behavior, constructed by the CoⅡ-formate magnetic chain and changing the spacers of [Co₈（OMe）₆（HCO₂）₄（isonic）₆·H₂O]_n. They are two rare single-chain magnets with the same building block. By contrasting the magnetism of the two complexes, it is found that the longer the linker, the weaker the interchain interaction, but the stronger the magnetic properties.2. Five coordination compounds（7-11） with hexacoordination Fe ions were synthesized by 4-benzykpyridine and its derivative, Sodium thiocyanate or sodium azide as a mixed ligand. Magnetic properties of 7-10 were studied. 7、9、10 are mononuclear complexes in magnetism reflecting the behaviors of the Fe^Ⅱ ions. 8 exhabits ferromagnetism.