Jump to main content
Jump to site search

Issue 6, 2018
Previous Article Next Article

Double-shelled hollow mesoporous silica nanospheres as an acid–base bifunctional catalyst for cascade reactions

Author affiliations

Abstract

Double-shelled hollow mesoporous silica nanospheres (HMS-Al@MS-NH2) have been successfully obtained using the shell-by-shell strategy, by which the isolated acidic (–Al) and basic (–NH2) sites were spatially incorporated in different shells. The characterization results indicate that HMS-Al@MS-NH2 possesses a hollow void and mesopores in both shells, and this favors the mass transfer of the reactants and products. As a spatially isolated acid–base bifunctional catalyst, HMS-Al@MS-NH2 proved to exhibit high catalytic performances in the one-pot deacetalization-Knoevenagel cascade reaction. Under the optimized conditions, the conversion of benzaldehyde dimethyl acetal approached ca. 100% for 2 h at 110 °C, mainly attributed to the isolated acidic and basic sites and to the hollow architecture and mesopores in the shells. Notably, the catalyst could be reused up to 4 times without obvious loss of activity and selectivity, indicating the high stability of the active acidic and basic sites in the framework. Moreover, the double-shelled hollow mesoporous silica spheres are also active and selective for the other cascade sequence of the deacetalization-Henry reaction.

Graphical abstract: Double-shelled hollow mesoporous silica nanospheres as an acid–base bifunctional catalyst for cascade reactions

Back to tab navigation

Supplementary files

Publication details

The article was received on 29 Nov 2017, accepted on 25 Jan 2018 and first published on 26 Jan 2018


Article type: Paper
DOI: 10.1039/C7NJ04670G
Citation: New J. Chem., 2018,42, 4095-4101
  •   Request permissions

    Double-shelled hollow mesoporous silica nanospheres as an acid–base bifunctional catalyst for cascade reactions

    C. You, C. Yu, X. Yang, Y. Li, H. Huo, Z. Wang, Y. Jiang, X. Xu and K. Lin, New J. Chem., 2018, 42, 4095
    DOI: 10.1039/C7NJ04670G

Search articles by author

Spotlight

Advertisements