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• W2049207553 abstract "AbstractThe aim was to obtain information on the one-electron reduction of the antimalarial natural drug artemisinin (ART). The pulse radiolysis of ART in H2O/ethanol (EtOH) (1:1 v/v) solution was studied in the absence and presence of the so-called redox indicators N,N,N’,N’-tetramethyl-p-phenylenediamine (TMPD), Fe(CN)64 − , 1,1′-dimethyl-4,4′-bipyridinium dichloride (methyl viologen, MV2 + ) and Fe(CN)63 − . In an argon-purged solution, ART reacts with solvated electrons (es−) with k = 4.4 × 109 dm3 mol − 1 s − 1 generating an absorption band rising in the ultraviolet region similar to the spectrum of the CH3•CHOH radical. The species originating from the reaction between ART and es− do not show any appreciable reactivity toward Fe(CN)64 − , TMPD, MV2 + and Fe(CN)63 − . The experiments performed in the presence of ART and MV2 + have provided strong support to the idea that the first species obtained from the addition of the electron, which is believed to occur at the endoperoxide group level, undergoes a rapid (k on the order of 108 s − 1 or higher) intramolecular rearrangement to give species, most likely carbon-centred radicals, that show some reactivity towards the methyl viologen radical cation (MV• + )." @default.
• W2049207553 created "2016-06-24" @default.
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• W2049207553 date "2005-04-01" @default.
• W2049207553 modified "2023-10-18" @default.
• W2049207553 title "Radiolytically induced one-electron reduction of artemisinin in H₂O/ethanol (1:1 v/v) solution: a pulse radiolysis study." @default.
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• W2049207553 doi "https://doi.org/10.1080/09553000500141355" @default.
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