Effective derivatization and extraction of insoluble missing lanthanum metallofullerenes La@C2n (n = 36–38) with iodobenzene. (March 2016)

• Record Type: Journal Article
• Authors: Maeda, Yutaka; Tsuchiya, Takayoshi; Kikuchi, Takashi; Nikawa, Hidefumi; Yang, Tao; Zhao, Xiang; Slanina, Zdenek; Suzuki, Mitsuaki; Yamada, Michio; Lian, Yongfu; Nagase, Shigeru; Lu, Xing; Akasaka, Takeshi
• Is Part Of: Carbon. Volume 98(2016)
• Page Start: 67
• Page End: 73
• Publication Date: 2016-03
• Subjects: Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2015.10.088
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: Extraction of insoluble metallofullerenes, La@C2n (n = 36–38), was conducted with dichlorobenzene, chlorobenzene, and iodobenzene as a solvent under reflux condition. When iodobenzene was used, La@C2n (n = 36–38) was successfully extracted as the corresponding phenyl adducts, such as La@C72 (C6 H5 ), La@C74 (C6 H5 ), and La@C76 (C6 H5 ). The number of isomers of corresponding adducts, La@C72 (C6 H5 ) and La@C74 (C6 H5 ), were reduced to one-third of that in 1, 2, 4-trichlorobenzene extracts, which was reported previously. Based on the spectroscopic analysis, the carbon cages of La@C72 (C6 H5 ) and La@C74 (C6 H5 ) were deduced to be La@ C 2 (10612)-C72 (C6 H5 ) and La@ D 3 h -C74 (C6 H5 ), respectively. The addition site carbon possessing very high radical character suggests that the corresponding adducts were produced by the addition of phenyl radical generated from iodobenzene on metallofullerenes.