Mechanism Studies on Reactions of ·OH,·H和ea-q with 2-Chlorophenol in Aqueous Solutions

Abstract

Abstract: Pulse radiolysis of aqueous 2-chlorophenol in dilute solutions under different conditions was studied. The main characteristic peaks in these transient absorption spectra were attributed and the build-up/decay trends of several transient species were investigated. Under alkaline conditions, the reaction of ^·OH radical and 2-chlorophenol produces o-chlorinated phenoxyl radical with a rate constant of 1.0×10⁹ L·mol ^-1·s^-1; while under acid conditions, the initial product is mainly OH-adduct. The reaction between ^·H and 2-chlorophenol produces H-adduct. In alkaline and nearly neutral solutions, e_a^-_q can capture Cl directly from 2-chlorophenol with a rate constant 1.25×10⁹ L·mol^-1·s^-1and 6.3×10⁸ L·mol^-1·s^-1, respectively.

Key words: 2-Chlorophenol, Pulse radiolysis, Transient absorbance spectra, Free radical

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DONG Wen-Bo, WANG Shu-Hui, YAO Si-De, HOU Hui-Qi . Mechanism Studies on Reactions of ^·OH,^·H和e_a^-_q with 2-Chlorophenol in Aqueous Solutions[J]. Chem. J. Chinese Universities, 2002, 23(10): 1896.

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Mechanism Studies on Reactions of ^·OH,^·H和e_a^-_q with 2-Chlorophenol in Aqueous Solutions

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