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Abstract
The application of differential cyclic voltfluorometry in total internal reflection (TIR) geometry to the study of Ru(bpy)32+ transfer at the water/1,2-dichloroethane (DCE) interface has been studied. The emission spectra of Ru(bpy)32+ in bulk water, in bulk DCE, and at various applied potentials at the water/DCE interface have also been measured. Both techniques allow discrimination between Ru(bpy)32+ in water and Ru(bpy)32+ in DCE. Also, the quenching of the excited state of aqueous Ru(bpy)32+, irradiated in TIR geometry, at the water/DCE interface by tetracyanoquinodimethane (TCNQ), dissolved in the adjacent organic phase, has been studied using time-resolved luminescence spectroscopy. Electrochemically controlled experiments were then conducted at applied interfacial potentials, and the only quenching observable was attributed to the transfer of Ru(bpy)32+ into the DCE phase by direct comparison with the voltfluorogram measured during the same experiment. At applied potentials where Ru(bpy)32+ was mai...
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