KINETICS AND PRODUCTS OF OH RADICAL-ADDITION TO BAICALIN

  • ZHANG, XJ
  • WU, JL
  • CAI, ZL
  • YAO, SD
  • ZUO, ZH
  • LIN, NY
Publication date
January 1995
Publisher
辐射研究
ISSN
0033-7587
Journal
issn:0033-7587
Citation count (estimate)
4

Abstract

The reaction of OH radicals with baicalin was studied by pulse and gamma radiolysis in N2O-saturated aqueous solutions. The addition of an OH radical to baicalin produced an intermediate species that shows a maximum UV absorbance band at 420 nm and decays with a unimolecular rate constant of 1.25 x 10(4) s(-1) and a bimolecular rate constant of 6.1 x 10(8) mol(-1) dm(3) s(-1). Four major final products were obtained by gamma irradiation, and their structures were identified. Two of them (P1 and P2) are suggested to originate from the unimolecular reaction and the other two (P3 and P4) from the bimolecular reaction of the radicals. (C) 1995 by Radiation Research SocietyBiologyBiophysicsRadiology, Nuclear Medicine & Medical ImagingSCI(E)P...

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