Abstract

The aim of this research is to study the thiourea (TU) and cysteine (Cys) photochemical transformations in aqueous solutions on model systems in order to estimate their role in the processes arising in the aquatic system. So, both thiols, TU and Cys, have been subjected to indirect photolysis with OH radicals, generated by the photodissociation of hydrogen peroxide on irradiation with different artificial light sources. It has been found that the indirect photolysis rates of TU and Cys depend on the chemical nature and initial concentrations of the substrate as well as H2O2. TU and Cys undergo photochemical transformations via very complex radical mechanisms.

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