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The carbonization of aromatic molecules with three-dimensional structures affords carbon materials with controlled pore sizes at the Ångstrom-level

, Yuma Sakatsume, Katsuto Onishi, Rui Tang, Kazuma Takahashi, , , , Takahiro Kakuta, Tada-Aki Yamagishi
Published: 21 May 2021
Communications Chemistry , Volume 4, pp 1-6; doi:10.1038/s42004-021-00515-0

Abstract: Carbon materials with controlled pore sizes at the nanometer level have been obtained by template methods, chemical vapor desorption, and extraction of metals from carbides. However, to produce porous carbons with controlled pore sizes at the Ångstrom-level, syntheses that are simple, versatile, and reproducible are desired. Here, we report a synthetic method to prepare porous carbon materials with pore sizes that can be precisely controlled at the Ångstrom-level. Heating first induces thermal polymerization of selected three-dimensional aromatic molecules as the carbon sources, further heating results in extremely high carbonization yields (>86%). The porous carbon obtained from a tetrabiphenylmethane structure has a larger pore size (4.40 Å) than those from a spirobifluorene (4.07 Å) or a tetraphenylmethane precursor (4.05 Å). The porous carbon obtained from tetraphenylmethane is applied as an anode material for sodium-ion battery.
Keywords: structures / pore sizes / carbonization of aromatic molecules / tetraphenylmethane / Heating / sodium / extremely

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