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  Guanine derived porous carbonaceous materials : towards C1N1

Kossmann, J., Heil, T., Antonietti, M., & Lopez Salas, N. (2020). Guanine derived porous carbonaceous materials: towards C1N1. ChemSusChem. doi:10.1002/cssc.202002274.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0007-48BE-3 Version Permalink: http://hdl.handle.net/21.11116/0000-0007-70E8-5
Genre: Journal Article

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 Creators:
Kossmann, Janina1, Author              
Heil, Tobias2, Author              
Antonietti, Markus3, Author              
Lopez Salas, Nieves1, Author              
Affiliations:
1Nieves Lopez Salas, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_3029702              
2Nadezda V. Tarakina, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_2522693              
3Markus Antonietti, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863321              

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Free keywords: Basic solid material; Carbon dioxide fixation; CN; Heterogeneous catalysis; Noble carbons
 Abstract: Herein, we study the basic nature of noble covalent, sp2-conjugated materials prepared via direct condensation of guanine in the presence of an inorganic salt melt as structure directing agent. At temperatures below 700 °C stable and more basic addition products with at C:N ratio of 1 (C<sub>1</sub>N<sub>1<sub> adducts) and with rather uniform micropore sizes are formed. Carbonization at higher temperatures breaks the structural motif, and N-doped carbons with 11 wt% and surface areas of 1900 m<sup2</sup> g<sup>-1</sup> are obtained. The capability for CO<sub>2</sub> sorption and catalytic activity of the materials depend of both their basicity and their pore morphology. The optimization of the synthetic parameters lead to very active (100% conversion) and highly selective (99% selectivity) heterogeneous base catalysts, as exemplified with the model Knoevenagel condensation of benzaldehyde with malononitrile. The high stability upon oxidation of these covalent materials and their basicity open new perspectives in heterogeneous organocatalysis.

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 Dates: 2020-10-22
 Publication Status: Published online
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 Identifiers: DOI: 10.1002/cssc.202002274
BibTex Citekey: doi:10.1002/cssc.202002274
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Title: ChemSusChem
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: ISSN: 1864-5631