A Neutral Templating Route to Mesoporous Molecular Sieves

A neutral templating route for preparing mesoporous molecular sieves is demonstrated based on hydrogen-bonding interactions and self-assembly between neutral primary amine micelles (S°) and neutral inorganic precursors (I°). The S° I° templating pathway produces ordered mesoporous materials with thi...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 1995-02, Vol.267 (5199), p.865-867
Main Authors: Tanev, Peter T., Pinnavaia, Thomas J.
Format: Article
Language:English
Subjects:
Absorbents
Amines
Chemistry
Colloidal state and disperse state
Electrostatics
Ethanol
Exact sciences and technology
Exhibits
General and physical chemistry
Hexagonal crystals
Inhalants
Ion-exchange
Ions
Micelles
Molecules
Other ion exchangers: preparations and properties
Porous materials
Quaternary ammonium compounds
Roasting
Surface physical chemistry
Surfactants
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Summary:A neutral templating route for preparing mesoporous molecular sieves is demonstrated based on hydrogen-bonding interactions and self-assembly between neutral primary amine micelles (S°) and neutral inorganic precursors (I°). The S° I° templating pathway produces ordered mesoporous materials with thicker framework walls, smaller x-ray scattering domain sizes, and substantially improved textural mesoporosities in comparison with M41S materials templated by quaternary ammonium cations of equivalent chain length. This synthetic strategy also allows for the facile, environmentally benign recovery of the cost-intensive template by simple solvent extraction methods. The S° I° templating route provides for the synthesis of other oxide mesostructures (such as aluminas) that may be less readily accessible by electrostatic templating pathways.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.267.5199.865