Abstract

DIAZ-URIBE, Carlos Enrique; VALLEJO-LOZADA, William Andrés  and  ALVARADO-RUEDA, Lizeth Johanna. The Hydroxyl Radical (Φ_OH) Production's Quantic Yield, by Fluorosconco in the TcPPFe/H₂O₂/UV-VIS System. Rev. Fac. ing. [online]. 2014, vol.23, n.36, pp.85-90. ISSN 0121-1129.

The quantum yield to production of hydroxyl radical (Φ_OH) was measured from the photolysis of hydrogen peroxide (H₂O₂) catalyzed by tetra-carboxy-phenyl-porphyrin Fe (III) (TCPPFe) under UV irradiation. Φ_OH was determined by fluorescence measurements by the reaction product between hydroxyl radical (HO^•) and the disodium terephthalate. The TCPPFepresented a Φ_OH = 0.13 while the standard uncatalyzed photolysis reaction of H₂O₂ presented a Φ_OH=O.11. Under light irradiation on H₂O₂ and TcPPFe, the radical HO^• was generated and, the reaction did not occur in the absence of light.

Keywords : Hydroxyl radical; Porphyrin; Quantum yield.

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