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On the generation of the hydrated electron during the sonolysis of aqueous solutions
Leena Dharmarathne1, Muthupandian Ashokkumar, Franz Grieser
1Particulate Fluids Processing Centre, School of Chemistry, The University of Melbourne, Parkville, Victoria 3010 Australia.
Abstract:
The formation of the hydrated electron through the secondary reaction, H + OH(–) → H(2)O + e(aq), has been examined in the sonolysis of argon-saturated aqueous solutions at an ultrasound frequency of 355 kHz. The detection of the hydrated electron was achieved by measuring its reaction with the one-electron acceptors Fe(CN)(6)(3–) and methyl viologen. The results obtained indicate that hydrated electrons are produced predominately at the bubble/aqueous solution interface at comparatively high local concentrations, estimated to be >>1.5 × 10(–3) M. The half life of the hydrated electron under such conditions is estimated to be <<60 ns.
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