Mixed-Ligand Complex Compounds of Europium(III) withortho-Methoxybenzoic Acid and Phosphorus-Containing Neutral Ligands

摘要

Luminescent coordination mixed-ligand compounds of europium(III) withortho-methoxybenzoic acid and phosphorus-containing neutral ligands of the isle-like structure Eu(MOBA)(3)center dot 3H(2)O and Eu(MOBA)(3)center dot L have been synthesized. MOBA-ortho-methoxybenzoic acid, L-hmpa (hexamethylphosphotriamide), tppo (triphenylphosphinoxide), Et(6)pa (hexaethylphosphotriamide). Thermal properties of the complex mixed-ligand compounds of europium(III) have been investigated. It has been shown that thermolysis results in the splitting of a neutral ligand molecule proceeding within one stage along with an endothermic effect. The complex compound appeared to be stable up to 280 degrees C. The composition and structure of the synthesized complexes have been established. Based on the IR spectroscopy data, it has been demonstrated that inortho-methoxybenzoates of europium(III)ortho-methoxybenzoic acid is coordinated to a europium(III) ion bidentately.