Computational study of the structure-free radical scavenging relationship of procyanidins.
Procyanidins (PCs) are effective free radical scavengers, however, their antioxidant ability is variable because they have different degrees of polymerisation, are composed by distinct types of subunits and are very susceptible to changes in conformation. In this work the structure-free radical scavenging relationship of monomers, dimers and trimers of PCs was studied through the hydrogen atom transfer (HAT), sequential proton-loss electron-transfer (SPLET) and single electron transfer followed by proton transfer (SET-PT) mechanisms in aqueous phase, employing the Density Functional Theory (DFT) computational method. The structure-free radical scavenging relationship of PCs showed a very similar behaviour in HAT and SET-PT mechanisms, but very different in the SPLET mechanism. The structural factor that showed more effects on the ability of PCs to scavenge free radicals in aqueous phase was the conformation.
Coordinación de Tecnología de Alimentos de Origen Vegetal, CIAD, A.C., Carretera a La Victoria km 0.6, Hermosillo, Sonora 83304, Mexico. Electronic address: mwilson@ciad.mx.
Ana María
AM
Mendoza-Wilson
Coordinación de Tecnología de Alimentos de Origen Vegetal, CIAD, A.C., Carretera a La Victoria km 0.6, Hermosillo, Sonora 83304, Mexico.
Sergio Ivan
SI
Castro-Arredondo
Coordinación de Tecnología de Alimentos de Origen Vegetal, CIAD, A.C., Carretera a La Victoria km 0.6, Hermosillo, Sonora 83304, Mexico.
René Renato
RR
Balandrán-Quintana
D000975:Antioxidants / Q000737:chemistry*; D044946:Biflavonoids / Q000737:chemistry*; D002392:Catechin / Q000737:chemistry*; D016166:Free Radical Scavengers / Q000737:chemistry*; D058105:Polymerization; D011108:Polymers; D044945:Proanthocyanidins / Q000737:chemistry*
D000975:Antioxidants; D044946:Biflavonoids; D016166:Free Radical Scavengers; D011108:Polymers; D044945:Proanthocyanidins; C017674:procyanidin; D002392:Catechin
Antioxidant; Computational; DFT; Free radical; Procyanidin