One-electron oxidation of antioxidants: A kinetic-thermodynamic correlation

被引：10

作者：

Villata, Laura S. ^{[1
]}

Berkovic, Andrea M. ^{[1
]}

Gonzalez, Monica C. ^{[1
]}

Martire, Daniel O. ^{[1
]}

机构：

[1] Univ Nacl La Plata, CCT La Plata CONICET, Inst Invest Fisicoquim Teor & Aplicadas INIFTA, La Plata, Buenos Aires, Argentina

来源：

REDOX REPORT | 2013年 / 18卷 / 05期

关键词：

ABTS; Antioxidants; Epicatechin; Epigallocatechingallate; Kinetic-thermodynamic correlation; ABTS RADICAL-CATION; CAPACITY; ASSAY; POTENTIALS;

D O I：

10.1179/1351000213Y.0000000063

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

The values of the bimolecular rate constants for the reactions of 2,2'-azino-bis(3-ethylbenz-thiazoline-6-sulfonic acid) radical cation with epicatechin (((2.4 +/- 0.2)) s(-1) M-1), and epigallocatechingallate ((29 +/- 5) s(-1) M-1) were obtained by spectrophotometric measurements. We propose a correlation between the Gibbs energy Delta G degrees for the one-electron charge-transfer reactions from several antioxidants to radical species and the rate constants of the corresponding bimolecular reactions. This correlation can be used to predict rate constants of reactions of known Delta G degrees values.

引用

页码：205 / 209

页数：5

共 21 条

[1] REACTION OF AZIDE RADICALS WITH AROMATIC-COMPOUNDS - AZIDE AS A SELECTIVE OXIDANT
ALFASSI, ZB
SCHULER, RH
[J]. JOURNAL OF PHYSICAL CHEMISTRY, 1985, 89 (15) : 3359 - 3363
[2] [Anonymous], CHEM KIN SIM CKS PRO
[3] [Anonymous], 2002, NDRL NIST SOL KIN DA
[4] Benzie IFF, 1999, METHOD ENZYMOL, V299, P15
[5] Cao GH, 1999, METHOD ENZYMOL, V299, P50
[6] A novel automated direct measurement method for total antioxidant capacity using a new generation, more stable ABTS radical cation
Erel, O
[J]. CLINICAL BIOCHEMISTRY, 2004, 37 (04) : 277 - 285
[7] Evaluation of total reactive antioxidant potential (TRAP) of tissue homogenates and their cytosols
Evelson, P
Travacio, M
Repetto, M
Escobar, J
Llesuy, S
Lissi, EA
[J]. ARCHIVES OF BIOCHEMISTRY AND BIOPHYSICS, 2001, 388 (02) : 261 - 266
[8] Henriquez C, 2004, J CHIL CHEM SOC, V49, P65, DOI 10.4067/S0717-97072004000100011
[9] Hollman PC, 1997, FOOD CHEM TOXICOL, V37, P937
[10] Jovanovic S.V., 1998, ANTIOX HEALTH DIS, P137

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