超音波による化学作用の定量化

概要

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It is very important to know the effective ultrasonic intensity in a reaction vessel to compare and reproduce the reported results carried out by the different laboratories. Last year, Japan Society of Sonochemistry has organized a working group for standardization of ultrasonic power for sonochemistry and examined the standardized method to calibrate for the sonochemical efficiency. In this paper, we report on the results of Fricke reaction, KI oxidation and decomposition of porphyrin derivatives by use of seven types of sonochemical apparatus in four different laboratories in the frequency range of 19.5kHz to 1.2 MHz. We found that there is the frequency dependence of the production yields of I_3^- and Fe^<3+> and the sonochemical efficiency of Fricke reaction and KI oxidation which was defined as the number of reacted molecule per unit ultrasonic energy. From these results, we propose the KI oxidation dosimetry using 0.1 mol・dm^<-3> KI solution as a standard method to calibrate the sonochemical efficiency of an individual reaction system.
日本ソノケミストリー学会の論文