Abstract
We have developed a group of photo-active and/or surface-active stable merocyanine dyes as a promising candidate for a so-called biomimetic photosynthetic pigment. The dye surfactant molecules have been found to form Langmuir-Blodgett (LB) films where the molecules constitute J-aggregates. The dye, in aqueous organic solutions as well as in vacuum-evaporated films, have been studied by absorption and by fluorescence spectroscopy to gain insight into the physicochemical properties of the merocyanine-dye LB films on various solid substrates. In addition, the LB films of the dye with an octadecyl group have been studied by photoelectrochemical and electron spin resonance techniques. It has been found that the dye monolayer-deposited SnO 2 optically transparent electrodes tend to act as photocathodes. The behaviour of the photo-induced electron spin resonance signal is also reported.
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