Effect of2-Methyl Substitution on the Stability of Spin Adducts Composed of Pyrroline-Oxide Analogues and Superoxide Anion Radicals

Chem. J. Chinese Universities ›› 2001, Vol. 22 ›› Issue (10): 1732.

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Effect of₂-Methyl Substitution on the Stability of Spin Adducts Composed of Pyrroline-Oxide Analogues and Superoxide Anion Radicals

XU Ying-Kai, SUN Jian, LIU Ke, CHEN Zhong-Wei, ZHANG Xing-Kang, LIU Yang

State Key Lab for Structural Chemistryof Unstableand Stable Species, Center for Molecular Science, Instituteof Chemistry, the Chinese Academy of Sciences, Beijing, 100080, China

Received:2001-07-03 Online:2001-10-24 Published:2001-10-24

Abstract

Abstract: The synthesis of a novel α phosphorus containing spin trap, DEPDMPO(5-diethoxy Phosphoryl-2, 5-dimethyl-1 pyrroline N-oxide) and the evaluation of its ability to spin trap the hydroxyl and the superoxide anion radicals were described in the present article. The ability to trap an active superoxide anion radical generated in the photo system Ⅱ(PSII) and the stability of their spin adduct of DEPDMPOas well as three previously reported traps DMPO, DEPMPOand m³POwere comparatively analyzed according to their chemical structures. In addition, the effects of 2-methyl and α phosphoryl substituted analogues of DMPOon the stabilities of the corresponding spin adduts were systematically illustrated

Key words: Spin trap, Nitrone, ESR, Superoxide anion

CLC Number:

O643

TrendMD:

XU Ying-Kai, SUN Jian, LIU Ke, CHEN Zhong-Wei, ZHANG Xing-Kang, LIU Yang . Effect of₂-Methyl Substitution on the Stability of Spin Adducts Composed of Pyrroline-Oxide Analogues and Superoxide Anion Radicals[J]. Chem. J. Chinese Universities, 2001, 22(10): 1732.

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Effect of₂-Methyl Substitution on the Stability of Spin Adducts Composed of Pyrroline-Oxide Analogues and Superoxide Anion Radicals

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