Mesoporous Sieves with Unified Hybrid Inorganic/Organic Frameworks

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• 作者：Brian J. Melde ; Brian T. Holland ; Christopher F. Blanford ; and Andreas Stein
• 刊名：Chemistry of Materials
• 出版年：1999
• 出版时间：November 1999
• 年：1999
• 卷：11
• 期：11
• 页码：3302 - 3308
• 全文大小：265K
• 年卷期：v.11,no.11(November 1999)
• ISSN：1520-5002

文摘

Mesoporous materials have been synthesized that are composed of hybrid frameworks inwhich inorganic and organic components have a fixed stoichiometry and are covalentlybonded. The creation of UOFMN (unified organically functionalized mesoporous networks)materials incorporates concepts employed in the synthesis of MCM-41 mesoporous silicates,making use of a quaternary ammonium cationic surfactant and a double trialkoxysilylprecursor such as bis(triethoxysilyl)ethane (BTSE) or bis(triethoxysilyl)ethylene (BTSEY).The cetyltrimethylammonium (CTA⁺) surfactant is removed by extraction with acid, resultingin a high surface area porous organosilicate framework in which Si atoms are bridged byethane (from BTSE) or ethylene (BTSEY) groups. The channels are wormlike and uniformin diameter. UOFMN materials are more hydrothermally stable than MCM-41 preparedunder similar conditions and have thicker pore walls. Ethylene groups in products madewith BTSEY can be brominated, the brominated product itself being reactive as a bromidesource. The UOFMN products were characterized by XRD, N₂ adsorption, solid-state ²⁹Siand ¹³C NMR, and TEM.