Abstract

In this paper we discuss the identification of the primary free radical species produced by sonolysis of noble gas-saturated aqueous solutions (i.e.• H, •OH, O2 •−) and in N2-containing aqueous solutions (i.e. •H, ·OH, O2 •−, and •NO) predominantly by means of electron paramagnetic resonance (EPR) spectroscopy with spin trapping. The EPR experiments which show that no detectable level of hydrated electrons is formed in the sonolysis of water at neutral pH are summarized.

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