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Reaction mechanism studies on isoquinoline with hydroxyl radical in aqueous solutions |
| ZHU Dazhang1, NI Yaming1, WANG Shilong2, SUN Xiaoyu2, YAO Side3 |
| 1.Department of Chemistry, Tongji University, Shanghai 200092, China; 2.School of Life Science and Technology, Tongji University, Shanghai 200092, China; 3.Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China; |
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Abstract The reaction mechanism between isoquinoline and ·OH radical in aqueous dilute solutions under different conditions was studied by pulse radiolysis. The main characteristic peaks in these transient absorption spectra were attributed and the growth-decay trends of several transient species were investigated. Under neutral or alkaline conditions, the reaction of ·OH radical and isoquinoline produces OH-adducts with respective rate constants of 3.4×109 and 6.6×109 mol-1 · dm3 · s-1 while under acidic conditions, the isoquinoline was firstly protonated and then ·OH added to the benzene ring and produced protonated isoquinoline OH-adducts with a rate constant of 3.9×109 mol-1 · dm3 · s-1. With a better understanding on radiolysis of isoquinoline, this study is of help for its degradation and for environmental protection.
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Issue Date: 05 December 2007
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