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  Sci. Lett. J. 2015, 4: 107  
  Research Article
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Metal-silicate catalysts: Single site, mesoporous systems without templates  
  Craig E. Barnesa, Katherine Sharpa, Austin A. Alberta, Michael E. Peretichb, Pasquale Fulvioc, Peter N. Ciesielskid, Bryon S. Donohoed  
a Department of Chemistry, University of Tennessee, Knoxville TN 37996, USA
b Naval Air Warfare Center Aircraft Division, 22229 Elmer Rd, Bldg 2360, Patuxent River, MD 20670, USA
cDepartment of Chemistry, University of Puerto Rico, Río Piedras Campus, San Juan, PR 00931, Puerto Rico
dBiosciences Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO 80401-3393, USA

  The textural properties of a family of silicate and mixed metal-silicate materials prepared by a nonaqueous sol-gel reaction involving the cubic silicate Si8O20 (SnMe3)8 and metal chlorides MCl4 (M = Si, Ti, Zr) cross-linking reagents are described. Nitrogen adsorption isotherm data is presented and surface area and pore size distribution analyses for several examples of these materials are developed and correlated with the ratio of cross-linking reagent and the cubic silicate building block at the time of synthesis. Significant surface area and pore size distributions that shift to higher pore diameters are observed as the ratio of cross-linking reagent-to-cubic building block increases. A simple strategy for simultaneously controlling the porosity of these matrices while homogeneously dispersing identical metal centers on their surfaces for next generation catalysts is described.  
  Nanostructured; Non-aqueous sol-gel; Building block solids; Porous solids; Heterogeneous catalysis; Single site catalysts  
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