Mechanism of reaction of nitrogen dioxide radical with hydroxycinnamic acid derivatives: a pulse radiolysis study.
Nitrogen dioxide radical (NO2.) is known as a toxic agent produced in the metabolism of nitrates and nitrites. By the use of the pulse radiolysis technique, the mechanism of the reaction of NO2. radical with hydroxycinnamic acid derivatives (HCA) was studied and the rate constants have been measured. The rate constants were found to be 7.4 x 10(8), 7.2 x 10(8), 8.6 x 10(8) dm3 mol(-1) s(-1) for ferulic acid, sinapic acid and caffeic acid, respectively. The reactions produce the corresponding phenoxyl radical.
Zhouen
Z
Z
Laboratory of Radiation Chemistry, Shanghai Institute of Nuclear Research, Academic Sinica, Peoples Republic of China.
Side
Y
Y
Weizhen
L
L
Wenfeng
W
W
Yizun
J
J
Nianyun
L
L
D002109:Caffeic Acids / Q000737:chemistry; D003373:Coumaric Acids / Q000737:chemistry*; D005609:Free Radicals / Q000737:chemistry*; D009585:Nitrogen Dioxide / Q000737:chemistry* / Q000378:metabolism; D011675:Pulse Radiolysis
D002109:Caffeic Acids; D003373:Coumaric Acids; D005609:Free Radicals; C073734:sinapinic acid; C004999:ferulic acid; D009585:Nitrogen Dioxide; C040048:caffeic acid