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- W2793551059 abstract "A synthetic procedure was developed to prepare dual acid–base catalysts on a single platform. Mesoporous SBA-15 was derivatized using known grafting chemistry via the following steps: (1) addition of Boc-protected 3-aminopropyltriethoxysilane; (2) controlled use of UV/ozonolysis to selectively remove the exterior groups; (3) decoration of the exterior sites freed in Step 2 with 3-mercaptopropyltriethoxysilane; (4) selective oxidation of the mercaptan groups to sulfonic acid; and (5) pyrolytic deprotection of the amine. The resulting catalysts contain sulfonic acid functionality on the external surfaces and entrance of the pores and amino groups deep inside those pores, at coverage ratios that can be controlled by tuning the exposure time during the UV/ozonolysis step. The samples were fully characterized by 29Si and 13C solid-state NMR, infrared absorption spectroscopy, acid–base titrations, and N2 adsorption isotherms measurements, and they were successfully tested for the promotion of a cascade Henry reaction. Optimum performance was seen with the catalyst having an overall 1:2 acid:base molar ratio." @default.
- W2793551059 created "2018-03-29" @default.
- W2793551059 creator A5019744998 @default.
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- W2793551059 date "2018-03-05" @default.
- W2793551059 modified "2023-09-24" @default.
- W2793551059 title "Synthesis of Solid Catalysts with Spatially Resolved Acidic and Basic Molecular Functionalities" @default.
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- W2793551059 doi "https://doi.org/10.1021/acscatal.7b04413" @default.
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