Abstract
AbstractSynthetic methods for a series of zinc tetra[6,7]quinoxalinoporphyrazines (6,7‐TQP) with peripheral chains connected through the S, O and N heteroatoms as well as through the C–C bond were developed. Photophysical and photochemical properties of 6,7‐TQP were compared with tetrapyrazinoporphyrazines (TPP) bearing the same peripheral substituents to disclose the effect of insertion of a benzene ring between the pyrazine and porphyrazine moieties. The influence of the peripheral heteroatom in the group of 6,7‐TQP is also discussed. Prepared 6,7‐TQP have their main absorption band (Q‐band) strongly batho‐ and hyperchromically shifted (λmax = 730–770 nm in pyridine, ϵ up to 500000 dm3 mol–1cm–1) in comparison to TPP. They showed high singlet oxygen quantum yields (ΦΔ = 0.50–0.74) and relatively lowfluorescence quantum yields (ΦF < 0.08).
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