Polymer films doped with boron difluoride ortho-hydroxydibenzoylmethanates: Solvatochromism and solvent-induced exciplex formation

• Published in: Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Vol. 267; p. 120548
• Main Authors: Khrebtov, Aleksandr A., Fedorenko, Elena V., Beloliptsev, Anton Yu, Mirochnik, Anatolii G.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15-02-2022
• Subjects: Boron difluoride beta-diketonate; Exciplex; Luminescence; OH/π interaction; Polymer films; Solvatochromism; Exciplex; Solvatochromism; Polymer films; OH/π interaction; Boron difluoride beta-diketonate; Luminescence
• ISSN: 1386-1425
• DOI: 10.1016/j.saa.2021.120548

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•Specific interactions of polymer matrices with dyes were revealed.•O-H/π interaction affects the formation of luminescent centers.•Solvent-induced exciplex formation of dyes with polystyrene was revealed.•Luminescence color of film can be controlled by a solvent at the manufacturing stage.
The spectral properties and solvatochromic behavior of boron difluoride ortho-hydroxydibenzoylmethanates in polymer matrices with different polarity (polystyrene, polyvinyl chloride, polycarbonate, poly(methyl methacrylate)) were investigated. The specific interaction of polystyrene, polycarbonate and poly(methyl methacrylate) with the investigated fluorophores was revealed. It was shown that the dyes are capable to form exciplexes with phenyl rings of polystyrene. The spectral properties of polystyrene films doped with boron difluoride ortho-hydroxydibenzoylmethanates, which were obtained by the pouring method, significantly depend on the solvent from which they were formed. This makes it possible to control the luminescence color of the films at the manufacturing stage.