Characterization and density functional theory study of the antioxidant activity of quercetin and its sugar-containing analogues

Natural antioxidants as stabilizers for polymers

“…Easier hydrogen atom abstraction from the pyrogallol moiety increases the radical scavenging ability of dihydromyricetin, which protected PEPQ much better and hindered its consumption. The substitution of the hydrogen atom of the hydroxyl group at ring C of quercetin to large saccharide groups slightly increased the bond dissociation enthalpies of all phenolic hydroxyls leading to the decreased activity of rutin [123]. These considerations are strongly supported by Fig.…”

Functionalization and antioxidant activity of polyaniline–fullerene hybrid nanomaterials: a theoretical investigation

“…The lower the E gap , the easier the electron inspires, and the more powerful is the antioxidant ability. 34 The different energy of E gap in polyaniline-fullerene hybrid nanomaterials is nicely demonstrated in the DOS spectra ( Fig. 8).…”

The antioxidant activity and active sites of delphinidin and petunidin measured by DFT, in vitro chemical‐based and cell‐based assays

“…These phenolic hydroxyls and B-ring were more active, so they were most vulnerable to the attack of electrophilic reagents, such as ·OH and metal ions (Kumar, Prabhu, & Bhuvanesh, 2014;Lu et al, 2014). Previous studies offered the same results that the role of B-ring was found to dominate the antioxidant activity of the phenolic compounds (Cai, Chen, Xie, Zhang, &·Hou, 2014). Form the result, 1-OH on A-ring and 8-OH on C-ring delocalized to certain extent, and 3-OH electron cloud density was small.…”