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<p></p><p>Zr(IV) and Hf(IV) phthalocyanines with chalcone-derived out-of-plane ligands were synthesized and characterized by standard spectro-scopic methods. The complexes combine two chromophores, enabling interchromophore interactions that strongly depend on solvent polarity. In toluene, the fluorescence excitation spectra closely follow absorption and include the ligand band, indicating efficient excita-tion energy transfer to the phthalocyanine core. In acetonitrile, the ligand contribution is weak, consistent with the drastic drop in fluores-cence quantum yield of the free ligand (0.2500 → 0.0036). These results reveal pronounced solvent-sensitive photophysical behavior, suggesting that such dual-chromophore phthalocyanines are promising for applications in solar-driven photocatalysis.</p>

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Synthesis and photophysical properties of Zr and Hf phthalocyanines with out-of-plane coordinated chalcones

  • 期刊论文

  • 发表日期：

    2026年5月13日

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  • Mykhaylo Yu. Losytskyy,
  • Iryna N. Tretyakova,
  • Svitlana Chernii,
  • Nataliia Fedosova,
  • Alexandr Starukhin,
  • Aleksander Gorski,
  • Vladyslava Kovalska,
  • Viktor Ya. Chernii

摘要

Zr(IV) and Hf(IV) phthalocyanines with chalcone-derived out-of-plane ligands were synthesized and characterized by standard spectro-scopic methods. The complexes combine two chromophores, enabling interchromophore interactions that strongly depend on solvent polarity. In toluene, the fluorescence excitation spectra closely follow absorption and include the ligand band, indicating efficient excita-tion energy transfer to the phthalocyanine core. In acetonitrile, the ligand contribution is weak, consistent with the drastic drop in fluores-cence quantum yield of the free ligand (0.2500 → 0.0036). These results reveal pronounced solvent-sensitive photophysical behavior, suggesting that such dual-chromophore phthalocyanines are promising for applications in solar-driven photocatalysis.