Acta Phys. -Chim. Sin. ›› 2008, Vol. 24 ›› Issue (12): 2321-2326.doi: 10.3866/PKU.WHXB20081229

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Studies on the Respective Reactions of Quinoline and Isoquinoline with Transient Species by Pulse Radiolysis

ZHU Da-Zhang, SUN Dong-Mei, JIANG Zhong-Liang, WANG Shi-Long, SUN Xiao-Yu, NI E-Ming   

  1. Department of Chemistry, Tongji University, Shanghai 200092, P. R. China; School of Life Science & Technology, Tongji University, Shanghai 200092, P. R. China
  • Received:2008-06-18 Revised:2008-09-15 Published:2008-12-04
  • Contact: ZHU Da-Zhang

Abstract: Respective reactions of quinoline and isoquinoline with typical oxidative/reductive transient species, i.e., hydrated electrons, hydroxyl radicals, and hydrogen atoms (obtained after the reaction of an electron beam by proper condition-controlling) were investigated by pulse radiolysis. Absorption spectra of the transient products and their change trends were investigated. Reaction rate constants of hydrated electrons with quinoline and isoquinoline were 7.1×109 and 3.4×109 mol-1·L·s-1, respectively. The hydroxyl radical had rate constants of 7.2×109 and 3.4×109 mol-1·L·s-1, respectively. The rate constants of hydrogen atoms were 5.7×109 and 3.6×109 mol-1·L·s-1, respectively. Results showed that both quinoline and isoquinoline reacted with hydrated electrons, hydroxyl radicals, and hydrogen atoms very quickly. However, reaction rates of quinoline with these transient reductive/oxidative species were faster than that of isoquinoline. Stabilities of the transient products from these reactions were analyzed by electron theory. Reaction products from quinoline’s reaction with transient species were found to be more stable than reaction products from the isoquinoline reaction and this difference was the reason for the difference in rate constants.

Key words: Quinoline, Isoquinoline, Transient species, Pulse radiolysis, Electron theory


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