30263-10-6Relevant academic research and scientific papers
N,N-Dimethylformamide-protected Fe2O3 Combined with Pt Nanoparticles: Characterization and Catalysis in Alkene Hydrosilylation
Nagata, Tatsuki,Tanaka, Tatsuya,Lin, Xianjin,Kondo, Ryota,Suzuki, Takeyuki,Kanda, Yasuharu,Toyao, Takashi,Shimizu, Ken-ichi,Obora, Yasushi
, (2021/11/30)
We report a combination of N,N-dimethylformamide (DMF)-protected Fe2O3 nanoparticles (NPs) and Pt NPs for the hydrosilylation of various industrially relevant alkenes and tertiary silanes. The DMF-protected Fe2O3 and Pt NPs catalysts were characterized by transmission electron microscopy, X-ray absorption spectroscopy, and X-ray photoelectron spectroscopy. The catalyst of DMF-protected Fe2O3 NPs combined with Pt NPs can be recycled for five cycles by a simple extraction using hexane/DMF. The developed combination Fe2O3/Pt NPs catalyst is effective up to the 1-kilogram scale.
Nano-dispersed platinum(0) in organically modified silicate matrices as sustainable catalysts for a regioselective hydrosilylation of alkenes and alkynes
Duke, Brett J.,Akeroyd, Evan N.,Bhatt, Shreeja V.,Onyeagusi, Chibueze I.,Bhatt, Shreya V.,Adolph, Brandy R.,Fotie, Jean
, p. 11782 - 11795 (2018/07/25)
Nano-dispersed platinum(0) particles stabilized in a range of organically modified silicate (ORMOSIL) matrices are investigated as sustainable catalysts for the hydrosilylation of alkenes and alkynes. In this study, five different siloxane matrices including triethoxysilane (HTEOS), methyltriethoxysilane (MTES), ethyltriethoxysilane (ETES), triethoxyvinylsilane (TEVS) and propyltriethoxysilane (PTES) are investigated, and the distribution of the metal particles in these materials analyzed by transition electron microscopy (TEM). The particles appeared to be generally of a small size, with a diameter of ca. 2-5 nm in each of these catalysts, however the distribution is not equally uniform from one matrix to the other. HTEOS, MTES and ETES that respectively carry a hydrogen, a methyl and an ethyl group on the triethoxysilane moiety, displayed a more uniform distribution, while particles appeared to be more scattered in the remaining matrices. Catalysts with a uniform particles distribution produced higher and consistent yields, while those with poor particles distribution produced lower and almost random yields, suggesting that the uniformity in particle distribution, and by extension the nature of the siloxane matrix, are important for the catalytic properties of these materials. The scope of the reaction was broadened to a range of olefins, with a goal of investigating the tolerability of the reaction toward a number of reactive functional groups, resulting in the preparation of 28 compounds. This catalytic system also enabled the hydrosilylation of a limited number of alkynes under the optimized reaction conditions.
