ハイドロキノンの化学反応に及ぼす超音波照射の影響

概要

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Oxidation of hydroquinone to quinone under ultrasonic irradiation has been reported in acidic solutions (Sharma and Prasad). In neutral aqueous solution (pH=6〜7), however, we found that this type of reaction does not take place, but another type ultrasonic reaction, production of 2, 5-dihydroxyquinone takes place instead. We investigated this latter type of reaction and obtained the following results: (i) ultrasonic irradiation produced hydrogen peroxide in solution, which led to the formation of 2, 5-dihydroxyquinone, and the concentration of H_2O_2 formed increased with the ultrasonic level; (ii) the formation reaction of 2, 5-dihydroxyquinone was accelerated by the ultrasonic local thermal action; (iii) the observed reaction was also accelerated by the vigorous ultrasonic stirring.
社団法人日本音響学会の論文