Mesoporous silicophosphates containing up to 22% phosphorus were prepared using cationic surfactants. A mesoporous silicophosphate of the approximate composition Si19P4O48 had a surface area of 770 m2g−1, after removal of the template. A thermal transformation from a lamellar to a hexagonal structure was observed in this solid. The mesoporous silicophosphate phases were characterized by infrared and NMR spectroscopy.
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