Zinc(II) and copper(II) complexes with pheophytin and mesoporphyrin and their stability to UV-B irradiation: Vis spectroscopy studies
نویسندگان
چکیده
The stability of Zn(II) and Cu(II) complexes of porphyrin derivatives (pheophytin and mesoporphyrin) to UV-B irradiation was studied by absorbance spectroscopy in 95 % ethanol. The chosen porphyrins and their heavy metal complexes underwent first-order photochemical decomposition. In general, pheophytin was more stable than mesoporphyrin to UV-B irradiation. Moreover, the stabilities of the Zn(II) complexes were lower than those of the Cu(II)-complexes for both pheophytin and mesoporphyrin. However, while the Cu(II)-complex with pheophytin was more stable than the one with mesoporphyrin, the situation was vice versa for the Zn(II)-complexes.
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