Capturing nonclassical C70 with double heptagons in low-pressure combustion
Fang-Fang Xie1, Zuo-Chang Chen1, Min Zhang1
1State Key Lab for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China. sldeng@xmu.edu.cn.
Chemical Communications (Cambridge, England)
|August 17, 2022
Summary
A novel fullerene, dihept-C70H6, featuring a double-heptagon structure, was identified in combustion soot. This discovery marks the first nonclassical fullerene isolable from both carbon arc and combustion environments.
Area of Science:
- Chemistry
- Materials Science
- Nanotechnology
Background:
- Fullerenes are allotropes of carbon with unique cage-like structures.
- Nonclassical fullerenes exhibit unusual cage topologies and properties.
- Previous isolation of dihept-C70Cl6 demonstrated the existence of double-heptagon fullerenes.
Purpose of the Study:
- To isolate and characterize a new fullerene derivative from combustion soot.
- To confirm the presence of double-heptagon structures in different carbon production methods.
- To establish dihept-C70H6 as the first nonclassical fullerene isolable from both carbon arc and combustion.
Main Methods:
- Low-pressure combustion synthesis of carbon materials.
- Soot extraction and purification techniques.
- Unambiguous structural characterization using advanced spectroscopic and analytical methods.
Main Results:
- Isolation and definitive characterization of a double-heptagon-containing C70H6 (dihept-C70H6).
- Confirmation that dihept-C70H6 shares the same heptagonal cage structure as dihept-C70Cl6.
- Demonstration of dihept-C70H6 isolability from low-pressure combustion soot.
Conclusions:
- Dihept-C70H6 represents a significant finding in fullerene chemistry.
- The ability to isolate this nonclassical fullerene from combustion expands production possibilities.
- This study establishes a precedent for nonclassical fullerenes being accessible through multiple synthetic routes.
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