Publication: Enhanced Catalytic Performance of ZnO/Carbon Materials with Highly Dense Active Sites in the Green Synthesis of Poly-substituted Quinolines
Date
2022-02
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info:eu-repo/semantics/openAccess
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Publisher
Elsevier
Abstract
A highly efficient methodology for the selective synthesis of nitrogen heterocycles via Friedländer reaction using carbon materials supported ZnO catalysts under the green chemistry domain is presented. The influence of the physicochemical properties of different carbon supports, in particular an activated carbon (AC), multi-walled carbon nanotubes (MWCNT) and a carbon aerogel (CA), on the catalytic performance is discussed. The developed catalysts are easily prepared by simple incipient wetness impregnation and a subsequent thermal treatment. These ZnO/carbon catalysts showed a great performance in the Friedländer condensation of 2-amino-5-chlorobenzaldehyde and carbonylic compounds with enolizable hydrogens, under solvent-free and mild conditions, affording in all cases selectively a total conversion to the corresponding quinoline. Both the Zn loading in combination with the developed microporosity of the selected carbon supports seem to be the key factors determining the catalytic performance. Yields obtained with ZnO/carbon composites catalysts are superior to those obtained by others widely used in fine chemistry such as, Zn-catalysts supported on mesoporous silica (SBA-15) and Zn-metal-organic-frameworks (MOF).
Description
This is an Accepted Manuscript of an article published by Elsevier in "Journal of Environmental Chemical Engineering, 10(1)", available at: https://doi.org/10.1016/j.jece.2021.106879
Este es el manuscrito aceptado del artículo publicado por Elsevier en "Journal of Environmental Chemical Engineering, 10(1)", disponible en línea: https://doi.org/10.1016/j.jece.2021.106879
Este es el manuscrito aceptado del artículo publicado por Elsevier en "Journal of Environmental Chemical Engineering, 10(1)", disponible en línea: https://doi.org/10.1016/j.jece.2021.106879
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Keywords
ZnO/carbon composites, metal-organic-frameworks, mesoporous silica, Friedländer reaction, fine chemistry
Citation
Godino-Ojer, M., Morales-Torres, S., Pérez-Mayoral, E., & Maldonado-Hódar, F. J. (2022). Enhanced catalytic performance of ZnO/carbon materials in the green synthesis of poly-substituted quinolines. Journal of Environmental Chemical Engineering, 10(1). https://doi.org/10.1016/j.jece.2021.106879
Center
Facultades y escuelas::Facultad de Ciencias
Department
Química Inorgánica y Química Técnica