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Photochemical synthesis of polyacrylate–silica hybrid sol–gel materials catalyzed by photoacids


  • This work was supported by the National Institutes of Health (Grant No. RO1-DE09848). YW is grateful to E. I. Du Pont de Nemours & Company, Inc. for a Young Faculty Award. We thank Professor a. W. Addison of Drexel University for many valuable discussions.


Photochemical synthesis of hybrid sol–gel materials is demonstrated for the first time. Photoacid-catalyzed sol–gel reactions of tetraethyl orthosilicate with polymer precursors under ultraviolet radiation produce poly-acrylate-silica materials (shown schematically in the Figure). The effect of the concentrations of the photoacids and polymer precursors and the intensity of the radiation is discussed.

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