Synthesis and characterization of transparent mesoporous materials by a non-aqueous sol-gel method

New inorganic-organic hybrid mesoporous materials were prepared by chemical modification of polymethylhydrosiloxane by 1,2-diaminopropane and 1,2-diaminocyclohexane, in tetrahydrofuran, using hexachloroplatinic acid (H2PtCl6 center dot 6H(2)O) as catalyst at room temperature. This reaction leads to the formation of transparent and monolithic gels. The products have been characterized by infrared and Si-29 CP MAS NMR spectroscopy. The results show that the organic components have reacted with the polymethylhydrosiloxane leading to colourless and coloured gels in which both organic-inorganic bridges are formed. The thermal treatment procedure was determined by TGA and DTA curves recorded on the hybrid gel powder drying at 100 degrees C during 24 h. Xerogels morphology and texture were performed by scanning electron microscopy (SEM) and Brunauer-Emmett-Teller method (BET). (c) 2007 Elsevier B.V. All rights reserved.