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<p>β-Diketonates of boron difluoride and polymer compositions based on them have recently attracted the attention of researchers due to their unique luminescent properties. The conformational behavior of the boron difluoride complexes significantly affects their optical properties. The conformational features of a number of symmetric boron difluoride curcuminoids and their effects on luminescent properties were investigated in this work. Dual luminescence was observed for the dyes studied: both blue (400–500 nm) and red (600–800 nm) luminescence were simultaneously detected. Using luminescence spectroscopy and quantum chemical calculations, the formation of rotamers and the twisted intramolecular charge transfer (TICT) state due to rotation around the single bond between the chelate cycle and double bond was explored. The effects of solvent polarity on the equilibrium between rotamers and the optical properties of the dyes were established.</p>

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Symmetrical curcuminoids of boron difluoride: rotamers and dual luminescence

  • 期刊论文

  • 发表日期：

    2025年11月1日

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  • A. G. Mirochnik,
  • A. Yu. Beloliptsev,
  • E. V. Fedorenko

摘要

β-Diketonates of boron difluoride and polymer compositions based on them have recently attracted the attention of researchers due to their unique luminescent properties. The conformational behavior of the boron difluoride complexes significantly affects their optical properties. The conformational features of a number of symmetric boron difluoride curcuminoids and their effects on luminescent properties were investigated in this work. Dual luminescence was observed for the dyes studied: both blue (400–500 nm) and red (600–800 nm) luminescence were simultaneously detected. Using luminescence spectroscopy and quantum chemical calculations, the formation of rotamers and the twisted intramolecular charge transfer (TICT) state due to rotation around the single bond between the chelate cycle and double bond was explored. The effects of solvent polarity on the equilibrium between rotamers and the optical properties of the dyes were established.