Role of the Alkyl−Alkoxide Precursor on the Structure and Catalytic Properties of Hybrid Sol−Gel Catalysts
Chemistry of Materials2005Vol. 17(26), pp. 6686–6694
Citations Over TimeTop 10% of 2005 papers
Abstract
Detailed diffuse-reflectance infrared Fourier transform structural analysis of a series of organically modified silicates (ORMOSIL)-entrapped catalysts, varying the molar percentage and the alkyl chain length of the organic group, shows that the important factors affording optimal catalytic performance are two: predominance of six-member siloxane rings (above 80% alkylation) and a low hydrophilicity−lipophilicity balance (HLB). These results provide investigators engaged in developing novel catalysts based on the sol−gel routean advanced chemical technology for synthetic organic/inorganic chemistrywith general guidelines to prepare optimal catalytic materials for a number of relevant applications.
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