Copper-doped sulfonic acid-functionalized MIL-101(Cr) metal–organic framework for efficient aerobic oxidation reactions |
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| Authors: | Xiujuan Li Zihao Zhou Yuzhen Zhao Daniele Ramella Yi Luan |
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| Institution: | 1. School of Materials Science and Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing, 100083 China;2. Key Laboratory of Organic Polymer Photoelectric Materials, School of Science, Xijing University, Xi'an, Shaanxi Province, 710123 China;3. Department of Chemistry, Temple University-Beury Hall, 1901, N. 13th Street Philadelphia, PA, 19122 USA |
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| Abstract: | A series of Cr-based metal–organic framework MIL-101-SO3H bearing sulfonic acid functional groups were utilized for the immobilization of catalytically active copper species via a post-synthetic metalation method. The novel materials were fully characterized by scanning electron microscopy, X-ray diffraction, energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), the Brunauer–Emmett–Teller method, and thermogravimetric analysis. XPS and the EDX element map both suggested that Cu2+ is coordinately bonded to the MIL-101-SO3H, which forms the MIL-101-SO3@Cu structure. The obtained copper-doped MIL-101-SO3@Cu-1, MIL-101-SO3@Cu-2, and MIL-101-SO3@Cu-3 catalysts were utilized in the selective oxidation of alcohols and epoxidation of olefins using molecular oxygen as an oxidant. Catalytic aerobic oxidation optimization showed that MIL-101-SO3@Cu-1 is the optimal catalyst and it can be reused ten times without compromising the yield and selectivity. |
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| Keywords: | metal–organic framework heterogeneous catalyst copper (II) catalyst epoxidation reaction selective alcohol oxidation |
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