Role of the Alkyl-Alkoxide Precursor on the Structure and Catalytic Properties of Hybrid Sol-Gel Catalysts

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• 作者：Alexandra Fidalgo ; Rosaria Ciriminna ; Laura M. Ilharco ; and Mario Pagliaro
• 刊名：Chemistry of Materials
• 出版年：2005
• 出版时间：December 27, 2005
• 年：2005
• 卷：17
• 期：26
• 页码：6686 - 6694
• 全文大小：403K
• 年卷期：v.17,no.26(December 27, 2005)
• ISSN：1520-5002

文摘

Detailed diffuse-reflectance infrared Fourier transform structural analysis of a series of organicallymodified silicates (ORMOSIL)-entrapped catalysts, varying the molar percentage and the alkyl chainlength of the organic group, shows that the important factors affording optimal catalytic performance aretwo: predominance of six-member siloxane rings (above 80% alkylation) and a low hydrophilicity-lipophilicity balance (HLB). These results provide investigators engaged in developing novel catalystsbased on the sol-gel route-an advanced chemical technology for synthetic organic/inorganic chemistry-with general guidelines to prepare optimal catalytic materials for a number of relevant applications.