Encapsulation of zinc tetrasulfophthalocyanine in sol-gel materials

摘要

Metallophthalocyanines (MPc) exhibit, among many useful properties, the ability 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 zinc tetrasulfophthalocyanine (ZnTSPc) encapsulated in silica xerogel matrix obtained by sol-gel technique. The resulted composites were transparent and homogeneous with appropriate optical quality. The trapping effect was checked by the characteristic absorption bands of ZnTSPc in the UV/Vis spectra and the different pore structures of the doped and undoped composites. The optical-limiting properties of the composites were measured at 532nm with 8-ns pulses.