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Effect of fluorine-containing chiral templates on Mg distribution in the structure of MgAPO-5 and its influence on catalytic activity

AuthorsGómez-Hortigüela Sainz, Luis ; Márquez Álvarez, Carlos ; Sastre, Enrique ; Corà, F.; Pérez Pariente, Joaquín
KeywordsMagnesium distribution
Structure directing effect
Helicoidal arrangement
Issue Date15-May-2006
CitationCatalysis Today
AbstractMgAPO-5 materials have been synthesized by using three new structure directing agents: S-(−)-1-benzyl-2-pyrrolidinemethanol, and its ortho- and meta-fluoro-benzyl derivatives. Their acidity has been measured and their catalytic activity tested in the cyclohexene oxide opening acid-catalyzed reaction. The catalytic activity of these materials can be related to their acidity. It has been found that MgAPO-5 samples synthesized from both fluorinated structure directing agents are much more active as acid catalysts for the reaction. A computational study based on molecular mechanics shows a rigid arrangement of the organic molecules in form of helices of dimers within the AFI structure, and suggests a direction of the fluorinated molecules towards the incorporation of magnesium atoms in the framework.
Publisher version (URL)http://dx.doi.org/10.1016/j.cattod.2006.01.014
Appears in Collections:(ICP) Artículos
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