Analysis of charge distribution on organic cations adsorbed clay surface

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The layerd material has a ordered structure and environment of the interlayer is variety. We discussed about the adsorption behavior of the cation dye to the anion clay surface, niobate, LDH etc. The clay and the LDH have the flat surfaces, niobate has ruggedness and complex interlayer structures. The charge position, size, extent and physical properties are different with each materials.We made the models of the crystal structure and studied by the molecular orbital calculations. The formation of in di-, tri-, tetra-catioic charged porphyrin/synthetic clay complexes was rationalized by a size-matching of distances between the charged sites in the porphyrin molecule on the clay surface ('size-matching rule').When using the interlayer as a chemical reaction field, it is difficult to use as the solution, that is low adsorption rate of light, because of the dispersion. To decrease the dispersion, we made the optically transparent nanolayered thin films. The first successful synthesis of photo-responsive multilayer spiral nanotubes by the introduction of polyfluorinate cationic azobenzene derivative into layered niobate interlayer I by a two-step guest-guest exchange method using the intercalation compound methyl viologen as precursor. By the light irradiation, we observed the trans to cis and the cis to trans conversion.