Abstract
A C60–silica hybrid monolith was prepared by the hydrosilylation of C60 in the presence of platinum catalyst followed by sol-gel process with tetraethoxysilane. The hydrosilylation with trichlorosilane, triethoxysilane, chlorodiphenylsilane, and dichlorophenylsilane gave silylated C60s as a brown pasty liquid. The formula was estimated to be C60{Si(OEt)3}2.6H2.6 or C60(SiPh2Cl)3.2H3.2 based on the proton nuclear magnetic resonance spectrum. A C60–silica hybrid gel monolith was obtained by sol-gel process of the silylates and tetraethoxysilane in ethanol followed by aging for 3 weeks at room temperature. The monolith was brown and transparent with a diameter of 25 mm. On the other hand, the sol-gel reaction of tetraethoxysilane, trimethoxyphenylsilane, and C60 provided a heterogeneous gel with a phase separation of C60.
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Gunji, T., Ozawa, M., Abe, Y. et al. Preparation of C60–Silica Hybrid Monolith by Sol-Gel Process. Journal of Sol-Gel Science and Technology 22, 219–224 (2001). https://doi.org/10.1023/A:1012243902181
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DOI: https://doi.org/10.1023/A:1012243902181