Abstract
New Brønsted solid acid, magnetic silica-supported perfluoroalkylsulfonylimide group was prepared. The as-synthesized functional siloxane oligomer was used to introduce perfluoroalkylsulfonylimide onto the magnetic core under the assist of TEOS, forming multi-layer core–shell structure, which was confirmed by TEM. The inner silica shell protected the acid-sensitive magnetic core from the corrosion of the strong acid; while the outer silica shell attached acid perfluoroalkylsulfonylimide groups. Good thermal stability (<229 °C) was expectable for the materials by TG analysis. The conclusive acid loadings of 0.61–0.69 mmol/g endowed the materials with efficient catalytic ability for the conversion of cellobiose to glucose (Glu), providing stable 85–91 % Glu yields throughout 3–4 cycles in water at 130 °C.
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Acknowledgments
We gratefully acknowledge the National Science Foundation of China (No. 21172083) and the Fundamental Research Funds for the Central Universities (No. 2662015PY060).
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Chen, M., You, L., Zhang, H. et al. Magnetic Silica Bonding Perfluoroalkylsulfonylimide as Reusable Brønsted Acid Catalysts for Cellobiose Hydrolysis. Catal Lett 146, 2165–2172 (2016). https://doi.org/10.1007/s10562-016-1842-2
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DOI: https://doi.org/10.1007/s10562-016-1842-2