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利用脉冲电子束进行了多种条件下 4-氯酚稀水溶液的脉冲辐解研究 ,对其瞬态光谱中的主要吸收峰作了归属 ,并初步考察了这些瞬态物种的生长、衰减等行为 .研究表明 ,·OH基与 4-氯酚在碱性条件下反应生成氯代酚氧基 ,速率常数为 4.14× 10 9L/(mol·s) ,在酸性条件下要经过OH -adducts ;H原子与 4-氯酚反应生成H -adducts的速率常数为 2 .0× 10 9L/(mol·s) ,产物可通过双分子二级反应逐步脱氯 ;eaq-可直接从 4-氯酚分子夺氯 ,反应速率常数为 1.82× 10 9L/(mol·s) .
The pulse radiolysis of 4-chlorophenol dilute aqueous solution under various conditions was studied by pulsed electron beam, and the main absorption peaks in the transient spectra were assigned. The growth and attenuation of these transient species were also investigated The results show that · OH groups react with 4-chlorophenol under basic conditions to produce chlorophenoxy groups with a rate constant of 4.14 × 10 9 L / (mol · s) and OH-adducts under acidic conditions; H The reaction between 4-chlorophenol and 4-chlorophenol leads to a rate constant of 2.0 × 10 9 L / (mol · s). The product can be gradually dechlorinated by bimolecular secondary reaction. Eaq- Chlorination, the reaction rate constant of 1.82 × 10 9L / (mol · s).