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Polymer-impregnated silica sol-gel compositematerials are hosts for organics in advanced optics applica-tion. An oligo-phenylene vinylene derivative 4,4u001f-(1,4-phenylene dithenylene)-bis-(N-methyl pyridinium iodide)(OPVD) was introduced to poly(hydroxyethyl methacrylate)(PHEMA)-impregnated silica composite film by the sol-gel process. By comparing the X-ray diffraction, UV-visible spectra, steady-state and time-resolved fluorescence spectraof OPVD in three solid matrices (PHEMA/silica composite film, pure PHEMA film, and pure silica film), the similarresults of PHEMA/silica composite film and pure PHEMAfilm demonstrate that the OPVD is primarily surrounded by a PHEMA-like environment in the composite matrix. Themodel of such structure is presented, which is useful for fur-ther understanding and optimizing of properties of dopedsol-gel materials.
Polymer-impregnated silica sol-gel composite materials are hosts for organics in advanced optics applications. An oligo-phenylene vinylene derivative 4,4 u001f- (1,4-phenylene dithenylene) -bis- (N-methyl pyridinium iodide) OPVD) was introduced to poly (hydroxyethyl methacrylate) (PHEMA) -impregnated silica composite film by the sol-gel process. By comparing the X-ray diffraction, UV-visible spectra, steady-state and time- resolved fluorescence spectra of OPVD in three solid matrices (PHEMA / silica composite film, pure PHEMA film, and pure silica film), the similar results of PHEMA / silica composite film and pure PHEMA fluoride demonstrated that the OPVD is surrounded by a PHEMA-like environment in the composite matrix. The model of such structure is presented, which is useful for fur-ther understanding and optimizing of properties of doped sol-gel materials.