Used as a photosensitizer in photodynamic therapy for cancer treatment due to its ability to generate reactive oxygen species under light irradiation. Its carboxyphenyl groups allow for easy conjugation to biomolecules or attachment to nanomaterials, enhancing targeted delivery. Also employed in dye-sensitized solar cells and photocatalytic systems for its strong visible light absorption and long-lived excited states. Suitable for bioimaging applications because of its luminescent properties and potential for cellular targeting.