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Abstract <p>The photophysical properties of solutions of EuCl<sub>2</sub> and EuBr<sub>2</sub> dihalides in tetrahydrofuran have been studied in detail for the first time. The absorption, photoluminescence (4<i>f</i><sup>6</sup>5<i>d</i><sup>1</sup> → 4<i>f</i><sup>7</sup> transition), and photoluminescence excitation spectra as well as photoluminescence yields and lifetimes of excited Eu<sup>2+</sup>* ions were measured. The effect of increasing the luminescence intensity of the Eu<sup>2+</sup> ion in the presence of aluminum alkyls was detected due to the rigid structure of a four-center complex formed by the interaction of EuCl<sub>2</sub> and EuBr<sub>2</sub> with aluminum alkyls.</p>

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Photophysical Characteristics of Solutions of Divalent Europium Dihalides EuX2 (X = Cl, Br). Aluminum Alkyls as Enhancers of Luminescence of the Eu2+ Ion

  • 期刊论文

  • 发表日期：

    2025年3月1日

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  • R. G. Bulgakov,
  • D. I. Galimov,
  • S. M. Yakupova,
  • K. S. Vasilyuk

摘要

Abstract

The photophysical properties of solutions of EuCl2 and EuBr2 dihalides in tetrahydrofuran have been studied in detail for the first time. The absorption, photoluminescence (4f65d1 → 4f7 transition), and photoluminescence excitation spectra as well as photoluminescence yields and lifetimes of excited Eu2+* ions were measured. The effect of increasing the luminescence intensity of the Eu2+ ion in the presence of aluminum alkyls was detected due to the rigid structure of a four-center complex formed by the interaction of EuCl2 and EuBr2 with aluminum alkyls.