Abstract
The reaction of the cubic octameric silicate anion, Si8O 8−20 , with dimethyldichlorosilane in 2,2-dimethoxypropane yielded solid products. FT-IR and solid-state 29Si NMR spectra of the products indicate that the silicate anion becomes cross-linked via the dimethylsilyl group without degradation of the cubic core, resulting in the formation of organic/silica hybrids consisting of the Si8O 8−20 structure as a building block. The hybrids are thermally stable up to ca. 380°C in air. The specific surface area of the hybrids is 31 m2 g−1, while the value increases to 339 m2 g−1 after calcination at 350°C in air. The process of increasing the surface area of the hybrids by the heat-treatment was investigated using solid-state 13C NMR spectroscopy.
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Hasegawa, I. Building block approach to organic/silica hybrid materials. J Sol-Gel Sci Technol 5, 93–100 (1995). https://doi.org/10.1007/BF00487725
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DOI: https://doi.org/10.1007/BF00487725