Synthesis and properties of titanium chelates coordinated with 2-hydroxy-N- (6-chloro-2-hydroxybenzylidene) anilines and their naphthyl derivatives were investigated. In the titanium chelate with 6-chlorobenzylidene anilines, the thermal stability increased by the introduction of nitro group into the aromatic ring, while it decreased by the introduction of methyl group. This thermal stability was related to the solubility : a chelate having higher solubility showed lower thermal stability. In the titanium chelate with naphthyl derivatives, the absorption maxima and absorption edge showed fairly red shift greater than the corresponding phenyl derivatives. These chelates showed lower solubility but higher decomposition temperature as high as that of phenyl derivatives.
Products in the thermolysis of typical organic pigments for sol-gel colored coating of glass bottles, diketopyrrolopyrrole (C.I. Pigment Red 254), copper phthalocyanine (C.I. Pigment Blue 15 : 3), and yellow metal complex (C.I. Pigment Yellow 150), and coating solutions containing those organic pigments, were analyzed with thermal gravimetric (TG) analysis, X-ray diffractometer, IR spectrophotometer, and GC-MS spectrometer. Carbon dioxide and water were mainly detected by the IR spectroscopic analysis of the decomposed gasses in thermolysis of the organic pigments at 550°C. When copper phthalocyanine and yellow metal complex containing transition metals were heated under the atmosphere until 1000°C, the transition metals turned to metal oxides as residue in the thermolysis. Actually, copper (II) oxide and nickel (II) oxide derived from these pigments were confirmed in silica matrix by X-ray diffraction and TG analyses. In the GC-MS analysis of the products in convenient thermolysis of organic pigments in a small glass tube, some substituted benzene derivatives were detected because of the insufficient combustion of diketopyrrolopyrrole and copper phthalocyanine.
The synthesis of Pt particles have been attempted by direct addition of N2H4 into the solubilized Na2PtCl6 system of Aerosol OT (AOT) reversed micelles, which were prepared based on the phase diagram of water solubilization by AOT/isooctane solutions. It was found that Na2PtCl6 was reduced when [N2H4] / [Na2PtCl6] was 15 or above and the resulting particle size was relatively uniform with diameter of about 5 nm. These particles were identified as metal Pt with fcc structure from X-ray and electron diffraction measurements. Then the influences of [N2H4], [Na2PtCl6], Rw (= [H2O] / [AOT]) and [AOT] on the particle size were further examined for the clarification of a factor controlling the particle size. As a result, Pt particle size was found to be determined by [N2H4] / [Na2PtCl6].