Synthesis and Isolation of Methacrylate- and Acrylate-Functionalized Polyhedral Oligomeric Silsesquioxanes (T8, T10, and T12) and Characterization of the Relationship between Their Chemical Structures and Physical Properties

摘要: Novel organic–inorganic hybrid nanobuilding blocks of methacrylate- and acrylate-functionalized polyhedral oligomeric silsesquioxanes were easily prepared via nucleophilic substitution on octakis(3-chloropropyl)octasilsesquioxane, using sodium methacrylate acrylate, respectively. From a practical standpoint, these cage-rearranged (T8, T10, T12) could be readily isolated in their pure form with conventional silica gel column chromatography. Octakis(3-propyl methacrylate)octasilsesquioxane (T8) is colorless, crystalline solid melting point 66.7–67.2 °C, while other cage products are colorless viscous liquids at room temperature. Moreover, we report that the chemical structure/physical property relationship silsesquioxane cages not only dependent symmetry inorganic core given temperature but also dictated by organic substituent mobility. Structures confirmed 1H, 13C, 29Si NMR spectroscopy and...