Citation: SUN Chang, ZHAO Sha-Sha, CHEN Ying, CHEN Mu-Qing, XIE Yun-Peng, LU Xing. High-Yield Synthesis and Isomeric Ratio Control of La Endohedral Metallofullerenes[J]. Chinese Journal of Inorganic Chemistry, ;2018, 34(2): 295-299. doi: 10.11862/CJIC.2018.031 shu

High-Yield Synthesis and Isomeric Ratio Control of La Endohedral Metallofullerenes

State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

Corresponding author: LU Xing, lux@hust.edu.cn
Received Date: 20 May 2017
Revised Date: 24 July 2017

Figures(4)

La-containing metallofullerenes were synthesized with a direct current arc-discharge method, and the experimental conditions such as helium pressure and current density were optimized to improve the yield of metallofullerenes (La@C_2v-C₈₂, La@C_s-C₈₂ and La₂@C₈₀). The raw soot was extracted by 1, 2, 4-trichlorobenzene and was then redissolved in toluene. The yields of the La-containing metallofullerenes were discussed based on the high performance liquid chromatographic results by comparing their peak areas with that of C₈₄. Experimental results show that the high yield of La@C₈₂ can be attributed to a synergetic effect of current density and He pressure, i.e. (1) low current and high He pressure; (2) medium current and medium He pressure; and (3) high current and low He pressure. Furthermore, the relative ratio of La@C_2v-C₈₂ and La@C_s-C₈₂ can be adjusted by changing the current density and He pressure. Surprisingly, it is discovered that low current density or low He pressure facilitates the formation of La₂@C₈₀, indicating that the formation process of La₂@C₈₀ may be different from that of La@C₈₂.
- La,
- fullerene,
- metallofullerene,
- arc-discharge,
- extraction
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