Adsorption and absorption behavior of cationic porphyrin on titania and clay nanosheets

In this study, the adsorption and absorption behavior of porphyrin derivatives on inorganic nanosheets were investigated. The relationship between orientation angle (θad) maximum wavelength (λmax) tetra (N-methyl-4-pyridinium)-porphyrin (p-TMPyP4+) adsorbed clay nanosheet (Sumecton SA (SSA)) titania (TNS, Ti0.89□0.11O2−0.11) monolayer film prepared by Langmuir-Blodgett method was examined dichroic waveguide spectroscopy. λmax each TMPyP4+ red-shifted an nanosheets. For example, p-TMPyP4+ in water 422 nm, while that shifted to 450 459 nm upon SSA TNS, respectively. According measurements, θad estimated be 13 3 degrees Judging from results for all porphyrin, a strong correlation shift found out. addition, it turned out depends electrostatic interactions anionic Thus, can controlled combination nanosheet.