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Abstract <p>Luminescent polymer composites based on polystyrene and polycarbonate doped with symmetric and asymmetric boron difluoride curcuminoids have been synthesized. The effect of substituents in the dye molecules, polymer matrix, and luminophore concentration on the spectral properties of the polymer composites has been studied. A bathofluoric shift of the luminescence maxima of the symmetric and asymmetric luminophores due to an enhancement in the electron-donating effect of the substituents has been detected. It has been found that of boron difluoride curcuminoids in the polymers, asymmetric curcuminoids exhibit positive solvatofluorism. A bathofluoric shift of the luminescence of the films with an increase in the luminophore concentration from 0.01 to 0.5% has been detected. It has been found that the polycarbonate film doped with a symmetric dye containing a methoxy group exhibits room-temperature delayed fluorescence due to the formation of excimers.</p>

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Luminescence of Polymer Composites Doped with Boron Difluoride Curcuminoids

  • 期刊论文

  • 发表日期：

    2025年6月1日

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  • A. I. Shchelokov,
  • A. E. Zapol’skii,
  • E. V. Fedorenko,
  • A. G. Mirochnik,
  • S. S. Golik

摘要

Abstract

Luminescent polymer composites based on polystyrene and polycarbonate doped with symmetric and asymmetric boron difluoride curcuminoids have been synthesized. The effect of substituents in the dye molecules, polymer matrix, and luminophore concentration on the spectral properties of the polymer composites has been studied. A bathofluoric shift of the luminescence maxima of the symmetric and asymmetric luminophores due to an enhancement in the electron-donating effect of the substituents has been detected. It has been found that of boron difluoride curcuminoids in the polymers, asymmetric curcuminoids exhibit positive solvatofluorism. A bathofluoric shift of the luminescence of the films with an increase in the luminophore concentration from 0.01 to 0.5% has been detected. It has been found that the polycarbonate film doped with a symmetric dye containing a methoxy group exhibits room-temperature delayed fluorescence due to the formation of excimers.