A Photoanodic Reaction with Rs. rubrum Chromatophores at an SnO₂ Electrode

Abstract

An anodic photocurrent was observed when an SnO₂ electrode, immersed in chromatophore suspension containing L-ascorbate and 1-methoxy-5-methylphenazinium methyl sulfate (m-PMS), was irradiated under potentiostatic conditions. The magnitude of photocurrent induced depended on chromatophore concentration, m-PMS concentration, ascorbate concentration, intensity of light, wavelength of the incident light and electric potential applied. A possible mechanism for induction of the anodic photocurrent was discussed.