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Electrochemical Probing of Photochemical Reactions Inside Femtolitre Droplets Confined to Electrodes



Random ensembles of femtolitre-volume droplets containing redox active, photosensitive compounds immobilised on an electrode substrate permit photoelectrochemical studies within femtometric environments. Two chemical systems are described; the first is the N,N,N′,N′-tetrahexyl-para-phenylenediamine redox-catalysed photochemical debromination of the anaesthetic reagent halothane; the second is the photoinduced electron transfer from excited chlorophyll a to vitamin K1, which has possible potential in the development of solar cells based on photosynthesis.