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| - Regenerator Dependent Photoinduced Desorption of a DicarboxylatedCyanine Dye from the Surface of Single-Crystal Rutile
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| - A photon-initiated desorption of a dicarboxylated thiacarbocyanine dye from a dye-sensitized semiconducting oxidecrystal has been observed when hydroquinone is used as a regenerator. No desorption was found under the sameconditions when KI was used as the regenerator. Intermittent illumination experiments suggest that the oxidationproducts of the hydroquinone regenerator compete for dye adsorption sites. By comparing the photocurrent decay atboth the dye monomer sensitization maximum and the dimer sensitization maximum, a rearrangement of monomerinto dimer was observed. A kinetic model for the photocurrent decay as a function of desorption time was derived,and the desorption rate constants were obtained by fitting the experimental data to the model.
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