Role of the alkyl-alkoxide precursor on the structure and catalytic properties of hybrid sol-gel catalysts

被引:150
作者
Fidalgo, A
Ciriminna, R
Ilharco, LM
Pagliaro, M
机构
[1] CNR, Ist Studio Mat Nanostrutt, I-90146 Palermo, Italy
[2] Univ Tecn Lisboa, Ctr Quim Fis Mol, Inst Super Tecn, P-1049001 Lisbon, Portugal
关键词
D O I
10.1021/cm051954x
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
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 route-an advanced chemical technology for synthetic organic/inorganic chemistry with general guidelines to prepare optimal catalytic materials for a number of relevant applications.
引用
收藏
页码:6686 / 6694
页数:9
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