期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 113, 期 52, 页码 21805-21814出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp9079124
关键词
-
资金
- Singapore Government Ministry of Education [T208B1222]
Water insoluble alpha-tocopherol films were deposited on the surface of gold, glassy carbon and platinum electrodes and their voltammetric behavior examined in aqueous solutions between pH 3 and 13. The voltammetric mechanism involved alpha-tocopherol being oxidized in a -2e(-)/-H+ process to form a phenoxonium cation, which underwent rapid reaction with water (or -OH at pH > 7) and rearrangement to form alpha-tocopherol quinone in a chemically irreversible process. The identity of alpha-tocopherol quinone was determined by reflectance-FTIR spectroscopy of the product oil the glassy carbon electrode surface and from comparison of the voltammetric data obtained with a sample of the alpha-tocopherol quinone model compound. alpha-Tocopherol quinone films could be voltammetrically reduced at negative potentials to form alpha-tocopherol hydroquinone in a +2e(-)/+2H(+) chemically reversible process. Experiments were also conducted by incorporating alpha-tocopherol into lipid (lecithin) multilayers deposited onto the electrode Surfaces and the electrochemical results compared with voltammetric data obtained from alpha-tocopherol films that were directly in contact with aqueous buffered solutions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据