1. Iron porphyrin-derived ordered carbonaceous frameworks
- Author
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Yuxin Wu, Fumito Tani, Hirotomo Nishihara, Jun Maruyama, Masanori Yamamoto, Henry Cove, Devis Di Tommaso, Hisashi Konaka, Yuichiro Hayasaka, Mao Ohwada, Kazuyuki Iwase, Kazuhide Kamiya, and Kazuma Takahashi
- Subjects
chemistry.chemical_classification ,Materials science ,Carbonization ,02 engineering and technology ,General Chemistry ,Polymer ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrocatalyst ,01 natural sciences ,Porphyrin ,Catalysis ,0104 chemical sciences ,X-ray absorption fine structure ,chemistry.chemical_compound ,chemistry ,Polymerization ,Scanning transmission electron microscopy ,Polymer chemistry ,0210 nano-technology ,Pyrolysis - Abstract
Iron-incorporated ordered carbonaceous frameworks (OCFs) have been synthesized by the pyrolysis of iron porphyrin with ethynyl groups as polymerizable/carbonizable moieties at a temperature higher than 600 °C. The pyrolysis behavior is analyzed by thermogravimetry-differential thermal analysis-mass spectrometry, and the obtained carbon materials are characterized by X-ray diffraction, X-ray absorption fine structure, and high-angle annular dark-field scanning transmission electron microscopy. The introduction of ethynyl groups at the meta positions of the peripheral phenyl groups is essential for efficient cross-linking upon thermal polymerization. The thermally stable polymer thus obtained can be transformed into OCFs with high carbonization yield of 93 % at the subsequent carbonization. OCFs possess periodic structural regularity and porphyrin Fe-N4 coordination structure, and exhibit electrocatalysis for the conversion of CO2 into CO.
- Published
- 2021