| Popis: |
The reactivity between various MnO2+/Mn3+ complexes and ascorbic acid/ascorbate were studied using pulse radiolysis. Experimental results indicate that Mn3+-sulfate reacts with both AH2/AH- via metal-ascorbate complexes. MnO2+-formate and Mn3+-pyrophosphate both appear to react by electron transfer with no evidence of complex formation. All of these metal complexes, with the exception of Mn3+-pyrophosphate, react as fast or faster with ascorbate than free O2-. The significance of this observation in light of metal-induced oxygen toxicity will be discussed. |
