Silicates containing highly dispersed group 13 (B, Al, Ga) elements represent a broad class of technologically important solid acid catalysts.  One of the critical characteristics of these materials is the dispersity of aluminum within the surrounding silicate matrix.  We have developed a synthetic methodology in which group 13 atoms can be incorporated into the silicate matrix while maintaining atomic dispersity.  Four coordinate aluminum and gallium centers are bound to the matrix through three M-O-Si bond with the fourth ligand being a neutral Lewis base such as pyridine or ethers (THF, diethyl ether).  3-coordinate boron sites are formed under similar conditions as aluminum and bind neutral Lewis bases reversibly.  The synthesis, characterization and reactivity of these Lewis acidic group 13 catalysts will be described.

New atomically dispersed group 13 (B, Al, Ga) silicate Lewis acid catalysts: Synthesis, characterization, and properties

245th National Meeting (2013)

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