Abstract
AbstractCatechin (5,7,3′,4′‐tetrahydroxyflavan‐3‐ol, Cat), a compound suggested to give protection to living organisms both by direct scavenging of free radicals and metal chelation, was investigated in the presence of Zn(II) and Cu(II) ions by different techniques.The UV/vis, Raman and IR studies were useful to assess the chelation sites, the relevant interaction of Cat with Cu(II) ions, as well as the weak affinity with Zn(II). Cat acts as a bidentate ligand through the catechol moiety on B‐ring, but the metal complex structure depends on the metal. In particular, some autoxidation processes may be involved in the formation of the Cu–Cat complexes. The protonation state of the B‐ring plays an important role both in metal chelation and scavenging activity of Cat.Information on the reactivity of the free Cat towards oxidizing radicals with different redox properties were obtained by pulse radiolysis. In all cases the relatively stable phenoxyl radicals resulted to be formed. Copyright © 2007 John Wiley & Sons, Ltd.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.