Anodic oxidation of trolox in aqueous solutions

被引：0
作者：
Malyszko, J [1 ]
Mechanik, M [1 ]
机构：
[1] Akad Swietokrzyska, Inst Chem, PL-25020 Kielce, Poland
来源：
POLISH JOURNAL OF CHEMISTRY | 2004年 / 78卷 / 09期
关键词：
anodic oxidation; carbon electrode; cyclic voltammetry; dimerization; trolox;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Electrochemical oxidation of trolox (6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid) was investigated on glassy carbon (GC) electrodes in buffered aqueous solutions in the pH range of 1.0-8.8. The results were interpreted in terms of the formation of phenoxyl radicals, and their subsequent dimerization (radical-radical coupling, i.e. DIM1). Dimerization rate constants were estimated from peak heights. pK(a) value of the carboxyl group was determined by potentiometric acid/base titration.
引用
收藏
页码：1575 / 1582
页数：8
相关论文
共 23 条
  • [1] The relative acidities of water and methanol
    Abrash, HI
    [J]. JOURNAL OF CHEMICAL EDUCATION, 2001, 78 (11) : 1496 - 1498
  • [2] ABSOLUTE DETERMINATION OF ELECTRON CONSUMPTION IN TRANSIENT OR STEADY-STATE ELECTROCHEMICAL TECHNIQUES
    AMATORE, C
    AZZABI, M
    CALAS, P
    JUTAND, A
    LEFROU, C
    ROLLIN, Y
    [J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1990, 288 (1-2) : 45 - 63
  • [3] ELECTRODIMERIZATION .7. ELECTRODE AND SOLUTION ELECTRON TRANSFERS IN RADICAL-SUBSTRATE COUPLING MECHANISM - DISCRIMINATIVE CRITERIA FROM OTHER MECHANISMS IN VOLTAMMETRIC STUDIES (LINEAR SWEEP, ROTATING-DISK, POLAROGRAPHY)
    ANDRIEUX, CP
    NADJO, L
    SAVEANT, JM
    [J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1973, 42 (02): : 223 - 242
  • [4] Some methodological problems in the determination of antioxidant activity using chromogen radicals: a practical case
    Arnao, MB
    [J]. TRENDS IN FOOD SCIENCE & TECHNOLOGY, 2000, 11 (11) : 419 - 421
  • [5] A critical appraisal of the use of the antioxidant capacity (TEAC) assay in defining optimal antioxidant structures
    Arts, MJTJ
    Dallinga, JS
    Voss, HP
    Haenen, GRMM
    Bast, A
    [J]. FOOD CHEMISTRY, 2003, 80 (03) : 409 - 414
  • [6] Electrochemical studies on antioxidants in bovine milk
    Chen, J
    Gorton, L
    Åkesson, B
    [J]. ANALYTICA CHIMICA ACTA, 2002, 474 (1-2) : 137 - 146
  • [7] Evaluation of plasma low molecular weight antioxidant capacity by cyclic voltammetry
    Chevion, S
    Berry, EM
    Kitrossky, N
    Kohen, R
    [J]. FREE RADICAL BIOLOGY AND MEDICINE, 1997, 22 (03) : 411 - 421
  • [8] GALUS Z, 1979, ELECTROANLYTICAL MET, P204
  • [9] GREEF R, 1985, INSTRUMENTAL METHODS, P195
  • [10] Hulanicki A., 1987, REACTIONS ACIDS BASE, DOI DOI 10.3791/61730
123