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A Sol-Gel Synthesis for Thermally Stable Aniline/Silica Material |
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| Authors: | Flávio A. Pavan Sheila Leal Tania M.H. Costa Edilson V. Benvenutti Yoshitaka Gushikem |
| Affiliation: | (1) LSS, Instituto de Química, UFRGS, CP 15003, 91501-970 Porto Alegre, RS, Brazil;(2) Instituto de Química, Unicamp, CP 6154, 13083-970 Campinas, SP, Brazil |
| Abstract: | Aniline/silica sol-gel material was obtained. The aniline was immobilized on the silica surface using chloropropyltrimethoxysilane as bridge reagent. The base activator NaH was used to produce a fast SN2 reaction between the base and the alkylorganosilane. The resulting modified silica was characterized by elemental analysis and infrared spectroscopy using an oven cell. The organic coverage on the surface was proportional to the organic precursor concentration. The aniline/silica materials are thermally stable up to 300°C, in high vacuum. |
| Keywords: | organofunctionalized silica infrared aniline thermal stability base activator |
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