Abstract
Mercaptopropyl-functionalized porous silicates were synthesized by the co-condensation of (mercaptopropyl)triethoxysilane and tetramethoxysilane in the presence of a cationic surfactant. The ordered hexagonal arrays of channels in the extracted product were microporous (14 A pore diameter) and contained high concentrations of alkylthiol functions. It was possible to oxidize the supported thiol groups to sulfonic acid groups, thus creating a solid acid ion exchanger. The sulfonic-acid functionalized material is an efficient heterogeneous acid catalyst.
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