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Pulse radiolysis study of the formation and the reactivity of baicalin radical anion, and in comparison with rutin, quercetin and acyrlate ester radical anions in ethanol
Sun, G; Wang, WF(王文锋); Wu, JL; Sun, G (reprint author), Washington Univ, Sch Med, Dept Internal Med, Div Bioorgan Chem & Mol Pharmacol, 660 S Euclid Ave, St Louis, MO 63110 USA, USA
2007
Source PublicationRADIATION PHYSICS AND CHEMISTRY
ISSN0969-806X
Volume76Issue:6Pages:951
AbstractThe reaction of solvated electrons with baicalin in N-2-saturated ethanol has been studied by pulse radiolysis. The results show that a solvated electron can add to baicalin and generate a baicalin radical anion with a maximum UV absorbance peak at 360 nm. Its molar extinction coefficient at this wavelength is 1.3 x 10(4) M-1 cm(-1). The rate constant for the build-up of the baicalin radical anion is 1.3(+/- 0.4) x 10(10) M-1 s(-1). Decay of the radical anion is induced by a proton transfer reaction and a recombination reaction, which involves a pseudo-first-order reaction with rate constant 2.6(+/- 0.4) x 10(3) s(-1) and a second-order reaction with rate constant 1.3(+/- 0.2) x 10(9) M-1 s(-1). The effect of acetaldehyde on the decay of the baicalin radical anion was also investigated. Electron transfer between the baicalin radical anion and acetaldehyde was not observed, probably due to the low rate of electron transfer between the baicalin radical anion and acetaldehyde. Reactivity of the rutin, quercetin, baicalin and ethyl acrylate radical anions are also compared. (C) 2006 Elsevier Ltd. All rights reserved.
KeywordBaicalin Solvated Electron Pulse Radiolysis Acetaldehyde Electron Transfer Rate Constants Baicalin Radical Anion
Subject AreaBiochemistry & Molecular Biology ; Chemistry
Indexed BySCI
Language英语
Funding Project应物所项目组
WOS IDWOS:000246503700007
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/8171
Collection中科院上海应用物理研究所2004-2010年
Corresponding AuthorSun, G (reprint author), Washington Univ, Sch Med, Dept Internal Med, Div Bioorgan Chem & Mol Pharmacol, 660 S Euclid Ave, St Louis, MO 63110 USA, USA
Recommended Citation
GB/T 7714
Sun, G,Wang, WF,Wu, JL,et al. Pulse radiolysis study of the formation and the reactivity of baicalin radical anion, and in comparison with rutin, quercetin and acyrlate ester radical anions in ethanol[J]. RADIATION PHYSICS AND CHEMISTRY,2007,76(6):951.
APA Sun, G,Wang, WF,Wu, JL,&Sun, G .(2007).Pulse radiolysis study of the formation and the reactivity of baicalin radical anion, and in comparison with rutin, quercetin and acyrlate ester radical anions in ethanol.RADIATION PHYSICS AND CHEMISTRY,76(6),951.
MLA Sun, G,et al."Pulse radiolysis study of the formation and the reactivity of baicalin radical anion, and in comparison with rutin, quercetin and acyrlate ester radical anions in ethanol".RADIATION PHYSICS AND CHEMISTRY 76.6(2007):951.
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