期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 12, 期 29, 页码 7026-7033出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.1c01678
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资金
- State Key Program for Basic Research [2017YFA0206304]
- National Natural Science Foundation of China [51972166]
Fluorination can significantly alter the physical and chemical properties of carbon materials. The concentration of edge C-F groups in multidimensional carbon materials depends on the crystallinity of the starting materials, fluorination pressure, and temperature, leading to significant differences in properties between different fluorinated structures.
Fluorination can significantly change the physical and chemical properties of carbon materials (CMs). Common sense for the fluorination mechanism for CMs indicates that one basal-plane C-F group (CF group) can form as one fluorine atom bonded to one carbon atom along the out-of-plane carbon networks without creating edge C-F groups (including CF2 and CF3 groups) at vacancies in carbon networks. We report that fluorination can generally create edge C-F groups in multidimensional CMs such as graphite, graphene, carbon nanotubes, and fullerene, and the concentration of edge C-F groups is dependent on both the crystallinity of starting CMs and the fluorination pressure and temperature. As an example, we show the significant differences in the band gap opening, photoluminescence, and magnetic properties between two half-fluorinated graphenes with different concentrations of edge C-F groups. Our findings highlight the importance of fluorination in creating edge C-F groups in the structure and properties and introduce new insight into fluorinated CMs.
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