Studying the Spectral Properties of Luminescent Polymer Composites Doped with Boron Difluoride Curcuminoids

Luminescent polymer composites based on polystyrene and polycarbonate doped with boron difluoride curcuminoids containing various substituents in the phenyl ring have been synthesized. The effect of substituents, polymer matrix, and luminophore concentration on the spectral properties of the polymer composites has been studied. It has been found that the effect of the electron-donating force of luminophore substituents on the emission characteristics of the films is similar to the effect of solutions. The films doped with luminophores containing alkyl substituents (1a–5a) do not change their emission characteristics upon switching to another polymer matrix, while the 6a-doped composites are characterized by positive solvatochromism. A bathofluoric shift of luminescence with an increase in the luminophore concentration to 0.5% is observed for all the films. It has been found that the 6a-doped films exhibit delayed fluorescence.