Voltammetric studies of photochemically generated free radicals
作者： Diane K. Smith , William E. Strohben , Dennis H. Evans
DOI: 10.1016/0022-0728(90)80029-6
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摘要: Abstract Steady-state currents for oxidation and reduction of photochemically generated radicals have been detected using platinum microelectrodes. Diphenylmethyl were produced by photolysis sym -tetraphenylacetone or a mixture tert-butyl peroxide diphenylmethane. Equations derived that relate the steady-state to concentration far from electrode, diffusion coefficient rate constant disappearance radicals. It was shown about 2 μM diphenylmethyl being under experimental conditions. The could also be normal pulse voltammetry at 25 μm diameter Reverse 1 ms measurement times revealed current cations in acetonitrile methylene chloride. reversible carbenium ion/neutral radical potential 0.00 ± 0.01 V vs. ferricinium/ferrocene acetonitrile. Similarly, diphenylcyanomethyl radical/carbanion couple − 0.96 ferrocene.
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