Enhancement of Zinc(II) Phthalocyanine Photophysical Properties in Water by Sulfonatocalix[4]arene‐Based Micelles

EZQUERRA RIEGA, SERGIO D.; CAMMARATA, AGOSTINA; MARINO, JULIETA; ROGUIN, LEONOR P.; GLISONI, ROMINA J.; LANTAÑO, BEATRIZ

ChemPhotoChem

Wiley-VCH GmbH, Weinheim

Lugar: Weinheim; Año: 2023 vol. 8

2367-0932

Zinc phthalocyanines have demonstrated a wide range ofapplications as photosensitisers, particularly in organic synthesis,photocatalysis and photodynamic therapy. Although theintroduction of ionic groups on the macrocycle peripheryincreases their water solubility, aggregation phenomena remainas a significant drawback for their application. In this study,amphiphilic sulfonatocalix[4]arene-based micelles were used topromote the monomerization of a cationic phthalocyaninethrough host?guest interactions. A comprehensive spectroscopiccharacterization was conducted, varying the concentrationof sulfonatocalix[4]arene, and binding parameters werecalculated to determine the optimal conditions for completemonomerization of the photosensitizer in water. Under theseconditions, the combination of sulfonatocalix[4]arene and thephotosensitizer activated its photophysical activity in aqueousmedia, showing significant singlet oxygen photoproduction,photocatalytic capability and photostability.