Abstract
The photosensitized oxidation of benzyl 4-hydroxybenzoate (benzylparaben, BeP), the endocrine disrupting compound, in homogenous aqueous solution of 4,4′,4″,4‴-(porphine-5,10,15,20-tetrayl)tetrakis(benzenesulphonic acid) (TPPS4) as photosensitizer was examined. A xenon lamp simulating solar radiation was used as a light source. The influence of pH of the reaction mixture, oxygen content and initial concentrations of photosensitizer and BeP on the reaction rate was studied. The major role of singlet oxygen in BeP degradation was proved by the experiments performed in the presence of hydroxyl radicals scavengers and singlet oxygen quenchers. The rate constants of singlet oxygen quenching by BeP in D2O buffer (pD 7, 9 and 10.8) were determined. Based on the kinetic model, the rate constants of singlet oxygen quenching and reaction with BeP as well as the rate constant of excited photosensitizer quenching by BeP were determined.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
