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

Autor: I. V. Kalinovskaya
Rok vydání: 2020
Předmět:
Zdroj: Optics and Spectroscopy. 128:605-609
ISSN: 1562-6911
0030-400X
DOI: 10.1134/s0030400x20050082
Popis: Luminescent coordination mixed-ligand compounds of europium(III) with ortho-methoxybenzoic acid and phosphorus-containing neutral ligands of the isle-like structure Eu(MOBA)3 · 3H2O and Eu(MOBA)3 · L have been synthesized. MOBA—ortho-methoxybenzoic acid, L—hmpa (hexamethylphosphotriamide), tppo (triphenylphosphinoxide), Et6pa (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°C. The composition and structure of the synthesized complexes have been established. Based on the IR spectroscopy data, it has been demonstrated that in ortho-methoxybenzoates of europium(III) ortho-methoxybenzoic acid is coordinated to a europium(III) ion bidentately.
Databáze: OpenAIRE
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