This member explains a mechanistic intuitiveness into the scavenging of superoxide radical anion (O2.-) by benzene-1,2,3-triol (pyrogallol) in N,N-dimethylformamide on the basis of cyclic voltammetry and in seated position electrolytic electron spin reverberation spectrum by way of density functional hypothesis (DFT) calculations. The closeness of pyrogallol altered the almost-reversible dioxygen/O2.- redox pair, signifying that O2.- was scavenged by pyrogallol by proton-coupled electron transfer (PCET), that involves two proton transfers and individual electron transfer. According to DFT computations, the superior kinetics of O2.- scavenging by pyrogallol as demonstrated for one electrochemical results can be related by the pre-sensitive formation of a hydrogen-bond (HB) complex and the subsequent coordinated two-proton-coupled power transfer (2PCET) characterized by the catechol subdivision in pyrogallol. Furthermore, comparative tests engaging related compounds revealed that the three hydroxyl groups of pyrogallol increase the establishment of HB complex even if individual of them is not complicated in the 2PCET mechanism, leading to the publicity of O2.- scavenging.
Author(s) Details:
Tatsushi Nakayama,
Department
of Pharmacy, Gifu Pharmaceutical University; Daigaku-Nishi, Gifu 501-1196,
Japan.
Please see the link here: https://stm.bookpi.org/NAPR-V9/article/view/11899
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