Acrylic acid modified zirconium chelates were prepared by the reaction of zirconium chelates with acrylic acid. The radical polymerization of the chelates provided poly [acryloxybis (ethyl acetoacetato) zirconium ethoxide] (PZA) and poly [methacryloxybis (ethyl acetoacetato) zirconium ethoxide] (PZM). Coating films with a thickness of 0.21-0.22μm were prepared by a spin coating of benzene/methyl ethyl ketone (v/v=1/1) solutions of PZA and PZM. The adhesion and hardness of coating films were evaluated based on JIS (Japanese Industrial Standard). The results showed that PZA and PZM formed tough coating films with adhesion of 10 points and hardness of 3-4H on a wide range of substrates, compared with poly (methyl methacrylate) and zirconium chelate. After heating the coating films up to 1000°C, the adhesion and hardness were 10 points and 9H, respectively, due to the formation of zirconia films with the elimination and combustion of organic moieties.
β-Type copper phthalocyanine (CuPc) thin films were prepared using a redox-active cationic surfactant with azobenzene moiety (AZTAB). An aqueous dispersion containing HCl, AZTAB, and CuPc was used for the film formation. A blue thin film was formed on an immersed base metal plate or on an immersed indium tin oxide (ITO) plate which was short-circuited with aluminium. The formed thin film had uniform thickness and was made of the particles. The amount of the film depended on concentration of AZTAB, and there was an optimum concentration at which the amount of the film was maximum.
3-Substituted 5-alkoxy-2-aryl-2H-indazoles were synthesized in low to moderate yields by the TiO2-photocatalyzed reaction (λ>280 nm) of 4-alkoxyazobenzenes in alcohols. The formation of hydroxyalkyl radicals and the presence of an electron-donating alkoxy group in the starting azobenzenes are very important in this reaction. This is an unique method for the synthesis of 3-substituted 5-alkoxy-2-aryl-2H-indazoles from 4-alkoxyazobenzenes.