Vinyl-functionalized ordered mesoporous silica can be prepared by co-condensation of
tetraethoxysilane (TEOS) and triethoxyvinylsilane (TEVS) in the presence of the triblock
copolymer Pluronic P123 (EO20PO70EO20) and inorganic salts such as NaCl. At low molar
percentage of 10% TEVS, the hexagonal structure analogous to SBA-15 is obtained. With
15% TEVS, a less defined material, but probably closer to the cubic Ia3d structure, is formed.
20% TEVS leads to the formation of well-ordered Ia3d materials over a relatively wide range
of temperatures and acid concentrations. The concentration of the added inorganic salts
has an influence on the formation of a specific structure. The pore system can be made
accessible by treatment with sulfuric acid at elevated temperatures, which selectively removes
the copolymer template and does not lead to the cleavage of the Si−C bond. With use of the
triblock copolymer Pluronic F127 (EO106PO70EO106) as a template, a vinyl-functionalized
structure analogous to SBA-16 can be synthesized.
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