Volume 9, Issue 2 pp. 144-151

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Studies on bio-antioxidants II. An ESR study on the antioxidant efficiency of ascorbyl palmitate in micelles^†

Zhong-Li Liu,

Zhong-Li Liu

National Laboratory on Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou, 730000

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Zheng-Xu Han,

Zheng-Xu Han

National Laboratory on Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou, 730000

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Pin Cheng,

Pin Cheng

National Laboratory on Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou, 730000

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Lung-Min Wu,

Lung-Min Wu

National Laboratory on Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou, 730000

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You-Cheng Liu,

Corresponding Author

You-Cheng Liu

National Laboratory on Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou, 730000

National Laboratory on Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou, 730000Search for more papers by this author

Zhong-Li Liu,

Zhong-Li Liu

National Laboratory on Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou, 730000

Search for more papers by this author

Zheng-Xu Han,

Zheng-Xu Han

National Laboratory on Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou, 730000

Search for more papers by this author

Pin Cheng,

Pin Cheng

National Laboratory on Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou, 730000

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Lung-Min Wu,

Lung-Min Wu

National Laboratory on Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou, 730000

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You-Cheng Liu,

Corresponding Author

You-Cheng Liu

National Laboratory on Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou, 730000

National Laboratory on Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou, 730000Search for more papers by this author

First published: March 1991

https://doi.org/10.1002/cjoc.19910090208

Citations: 7

^†

For Part I of the series, see Scientia Sinica (B), Engl. Ed., 32, 937 (1989).

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Abstract

The kinetics for the reaction of ascorbyl palmitate and 4-hydroxy-TEMPO, 4-methoxy-TEMPO or 4-hexanoyloxy-TEMPO in CTAB and SDS micelles was studied by ESR spectroscopy. It was found that the behavior of ascorbyl palmitate is remarkably different from ascorbic acid in their antioxidant activity in micelles. The predominant factors governing the activity in micelles involve the lipophilicity of the antioxidant and the oxidant, the charge type of the substrates and the concentration of the surfactant. As high as 2 × 10⁴ fold rate variation was observed by changing the lipophilicity of the antioxidant and the microenvironment of the reaction medium.

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Volume9, Issue2

March 1991

Pages 144-151

Studies on bio-antioxidants II. An ESR study on the antioxidant efficiency of ascorbyl palmitate in micelles^†

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Studies on bio-antioxidants II. An ESR study on the antioxidant efficiency of ascorbyl palmitate in micelles†

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Studies on bio-antioxidants II. An ESR study on the antioxidant efficiency of ascorbyl palmitate in micelles^†