Octasilsesquioxanes as hybrid nanocomposite platforms. II. Synthesis, characterization and properties of some alkyl-functionalized silsesquioxanes

The syntheses of octaalkylsilsesquioxanes 3, 4, 5 and 6 have been achieved by the platinum-catalyzed hydrosilylation of octahydrogensilsesquioxane 2 with ω-halo-alkenes and other unsaturated substrates. These compounds were characterized by spectroscopic techniques and elemental analysis. Thermogravimetric analyses of 3 and 4 shows that they are reasonably stable thermally, and may act as building blocks to ceramics, nanometer ball bearing at around 400°C and photoresist materials.