Scrano, Laura; Bufo, Sabino A.; D’Auria, Maurizio; Meallier, Pierre; Behechti, Akbar; Shramm, Karl Werner published the artcile< Photochemistry and photoinduced toxicity of acifluorfen, a diphenyl-ether herbicide>, Synthetic Route of 35852-58-5, the main research area is photochem photoinduced toxicity acifluorfen UV photolysis.
Photochem. studies can be helpful in assessing the environmental fate of chems. Photochem. reactions lead to the formation of byproducts that can exhibit different toxicol. properties from the original compound For this reason the photochem. behavior of the herbicide acifluorfen (5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoic acid) in the presence of different solvents was studied. Photochem. reactions were carried out using a high-pressure mercury arc and a solar simulator. Kinetic parameters and quantum yields were determined The identification of photoproducts was performed by mass spectrometry and [1H] NMR. Nitrofluorfen, hydroxy-nitrofluorfen, 2-chloro-4-(trifluoromethyl)-phenol, 5-trifluoromethyl-5′-nitrodibenzofuran, and other derivatives were identified. The photochem. reactions were also carried out in the presence of either a singlet or a triplet quencher, and in the presence of either a radical initiator or a radical inhibitor. Substances used as inhibitors of the excited levels T1 and S1 showed that photodegradation of acifluorfen begins from a singlet state S1 through a π,π* transition. The role of free radicals in the photodegradation of acifluorfen was determined and a radical mechanism was proposed. Toxicity tests against Daphnia magna Strauss showed that acifluorfen was not toxic at a concentration of 0.1 mM; however, photoproducts formed after 36 h of UV exposure of the herbicide induced a remarkable toxicity to the test organism.
Journal of Environmental Quality published new progress about Daphnia magna. 35852-58-5 belongs to class chlorides-buliding-blocks, and the molecular formula is C7H4ClF3O, Synthetic Route of 35852-58-5.
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