Metallophthalocyanines (MPc) have exvellent photoelectricity properties. But their low solubility in sol-gel precursor and the tendency to aggregate make it difficult to get their homogeneously composites with traditional sol-gel schedule. To overcome this problem, a newly developed 'in-situ synthesis' technique during sol-gel process is successfully used to synthesize Nicekl phthalocyanine (NiPc) in silica xerogel matrix under the irradiation of microwave. As the result, a new kind of organic/inorganic nanocomposite was obtained. The characterization of the glass sample and its extract were carried out by methods of IR and UV/VIS spectra. The 'in-situ synthesis' mechanism of NiPc and its reaction dynamics under the irradiation of microwave were discussed.
Metallophthalocyanines (MPc) exhibit, among many useful properties, the abilty to protect sensors against short, intense pulse deleterious to efficient sensor operation. For the successful application of this optical limiting property, an important issue is the incorporation of MPc molecules in a matrix to fabricate a solid state system. We report here the study of different concentrations of Nickle Tetrasulfophthalocyanine (NiTSPc) encapsulated in silica xerogel matrix obtained by sol-gel technique. The resulted composites were transparent and homogeneously with appropriate optical quality. The trapping effect was check by the characteristic absorption bands of NiTSPc in the UV/Vis spectra. The optical limiting properties of the composites were measured at 532nm with 8ns pulses.