25. 超音波照射下における有機電極反応(44) : 種々の音源により形成される音場中でのマレイン酸ジメチルの電解還元反応

概要

論文の詳細を見る
Chemical reactions under sonication are greatly affected by a geometrical placement of the constituents in sonochemical instrumentation since longitudinal ultrasonic waves travelling in liquid would cause reflection, interference and attenuation. Therefore, it is necessary to take account for the placement of the instrumental constituents. In order to establish a guideline for electrochemical application of ultrasounds, in the present work, an electrode reaction was examined under different placement of the electrode with ultrasounds produced by a various types of ultrasonic oscillator. In fact, the electrode reaction such as dimethyl maleate reduction was found to be affected by a placement of the working electrode in the system. For instance, the limiting current density for the reduction varied periodically along the axis of the ultrasonic beam, the distance between two maxima or two minima was almost constant, close to the theoretical half wave length in water when the immersible transducer was used as an ultrasonic device. On the other hand, when the stepped horn was used as an ultrasonic device, the limiting current density was decrease with an increase in the distance between the electrode surface and the top of the horn.
日本ソノケミストリー学会の論文