Abstract
Two samples of aminopropyl-functionalized silica (APS) have been prepared by grafting an organosilane precursor 3-aminopropyl-triethoxysilane onto the SBA-15 in ethanol or toluene. Aminopropyl-functionalized silica-E (sample grafted in ethanol) and APS-T (sample grafted in toluene) were evaluated in carbon–carbon bond forming reactions such as the Knoevenagel condensation and the Claisen–Schmidt condensation. It has been found that the sample grafted in ethanol displayed better catalytic properties than the sample grafted in toluene. The surface silanol groups, which were proven to be more numerous in samples grafted in ethanol compared to those grafted in toluene, were found to be responsible for the enhanced catalytic activity in carbon–carbon bond forming reactions.
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This work was supported by Jilin province (20090591) and the National Natural Science Foundation of China (20673046).
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Shang, F., Wu, S., Guan, J. et al. A comparative study of aminopropyl-functionalized SBA-15 prepared by grafting in different solvents. Reac Kinet Mech Cat 103, 181–190 (2011). https://doi.org/10.1007/s11144-011-0290-7
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DOI: https://doi.org/10.1007/s11144-011-0290-7