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Spectral-Luminescent Properties of Mixed-Ligand Europium(III) Complexes with O-Methoxybenzoic Acid and Phosphorus-Containing Neutral Ligands

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Abstract

The spectral-luminescent properties of europium(III) complexes with o-methoxybenzoic acid and phosphorus-containing neutral ligands with an island structure and the compositions Eu(MOBA)3 · 3H2O and Eu(MOBA)3 · L, where MOBA is o-methoxybenzoic acid and L is hmpa (hexamethylphosphortriamide, tppo (triphenylphosphinoxide), and Et6pa (hexaethylphosphortriamide), are studied. It is found that the excitation energy transfer to the europium ion occurs from the levels of both o-methoxybenzoic acid and phosphorus-containing neutral ligands. The electronic absorption and luminescence excitation spectra, as well as the Stark structure of the 5D0−7Fj ( j = 0–2) electronic transitions in the luminescence spectra of mixed-ligand complexes of europium(III) o-methoxybenzoates, are analyzed. The highest luminescence intensity is demonstrated by europium(III) methoxybenzoate with triphenylphosphinoxide.

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Funding

This work was supported by the Ministry of Education and Science of the Russian Federation (state order no. 0265-2014-0001).

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  1. Institute of Chemistry, Far East Branch, Russian Academy of Sciences, 690022, Vladivostok, Russia

    I. V. Kalinovskaya

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  1. I. V. Kalinovskaya
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Correspondence to I. V. Kalinovskaya.

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Translated by M. Basieva

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Kalinovskaya, I.V. Spectral-Luminescent Properties of Mixed-Ligand Europium(III) Complexes with O-Methoxybenzoic Acid and Phosphorus-Containing Neutral Ligands. Opt. Spectrosc. 128, 698–701 (2020). https://doi.org/10.1134/S0030400X20060077

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