Photo-Ionization of Molecules in Solutions. VI. Studies on the Photo-current Arising from the Flash-Excitation of Aromatics in Solutions

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Abstract
A technique is described for the study of the photocurrent due to the transient ionic species produced by the flash photolysis of aromatics in solutions at room temperature. The technique has proved to give valuable information in a way complementary to conventional flash spectrometry. The photo-ionization of N,N,N′,N′-tetramethyl-p-phenylenediamine was studied by this method in polar and non-polar solvents. The photocurrents of the solutions of some electron donor-acceptor systems were also measured, and the results were compared with that obtained from flash spectrometry. The recombination rate constants of the ionic species were estimated from the decay of transient photocurrents.

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