Photocurrent, ITIES

Irradiation of an ITIES by visible or UV light can give rise to a photocurrent, which is associated with the transfer of an ion or electron in its excited state. Alternatively, the photocurrent can be due to transfer of an ionic product of the photochemical reaction occurring in the solution bulk. Polarization measurements of the photoinduced charge transfer thus extend the range of experimental approaches to... 

Photocatalytic processes in two-phase systems involve either a homogeneous photoreaction followed by the transfer of intermediate species across the interface, or a heterogeneous electron transfer between the photoactive species and the substrate. At the polarizable ITIES, both processes would manifest themselves by an increase in the current on illumination at constant potential, i.e., a photocurrent response. Indeed, photocurrent measurements have been recorded for the transfer of photogenerated ions at a liquid liquid boundary, as well as for heterogeneous redox quenching. We shall review some of these studies in this section. 

As for electron transfer reactions at an ITIES (see Chapter 4), the study of IPET or interfacial photoinduced electron transfer has been scarce because of the difficulty in identifying systems where the photoproducts do not cross the interface in the potential region where the IPET photocurrent can be measured. Thomson et al measured photocurrents for the system... 

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