The Mechanism of a Reaction between α-Tocopherol and DPPH·Studied by NMR and ESR Spectroscopy

Chinese Journal of Magnetic Resonance ›› 2008, Vol. 25 ›› Issue (3): 331-336.

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The Mechanism of a Reaction between α-Tocopherol and DPPH^·Studied by NMR and ESR Spectroscopy

YANG Ying¹; YAN Bao-zhen¹; NIE Zhou²; WANG Mei¹; TIAN Qiu²; LIU Yang²*

(1.School of Science, Beijing University of Chemical Technology, Beijing 100029, China; 2.State Key Lab for Structural Chemistry of Unstable and Stable Species, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China)

Received:2008-01-21 Revised:2008-03-04 Online:2008-09-05 Published:2009-12-05
Contact: Liu Yang

Abstract

Abstract: In this paper the reaction product of α-tocopherol and DPPH^·radical in DMSO was analyzed by NMR spectroscopy, and found to have a tetraalkylbenzoquinonoid group. The reactive ratio of α-tocopherol to DPPH^· was confirmed to be 1∶2 with ESR spectroscopy. Based on these two results, it is proposed that the reaction pathway of α-tocopherol and DPPH^·has two steps.

Key words: NMR, ESR, reaction mechanism, α-tocopherol, DPPH^•,

CLC Number:

O482.53

YANG Ying¹; YAN Bao-zhen¹; NIE Zhou²; WANG Mei¹; TIAN Qiu²; LIU Yang²*
. The Mechanism of a Reaction between α-Tocopherol and DPPH^·Studied by NMR and ESR Spectroscopy[J]. Chinese Journal of Magnetic Resonance, 2008, 25(3): 331-336.

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The Mechanism of a Reaction between α-Tocopherol and DPPH^·Studied by NMR and ESR Spectroscopy

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