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Introduction to Endohedral Fullerenes with the C60 Cage

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Abstract

This introductory chapter explains endohedral metallo[60]fullerenes that have the C60 cage. Immediately after discovery of C60, interaction between fullerenes and the La atom was first discussed in 1985. Encapsulation of La in the fullerene cages was then demonstrated in 1991. Attempted extraction of La@C60 with hot toluene failed, whereas La@C82 was unexpectedly extracted. Subsequently, successful extraction of Ca@C60 was reported, and its molecular ion peak was observed in the mass spectrum of the extract. An improved extraction method using pyridine was developed, and various endohedral metallo[60]fullerenes were reported with the inner metals, such as Ba, Sr, Y, La, Ce, Pr, Nd, Gd, Er, Eu, and Dy atoms. However, little research has investigated the further chemical characterization and physical properties of these compounds. This is mainly because of the charge transfer interaction between the endohedral metallo[60]fullerenes and the specific solvent molecules such as pyridine. Satisfactorily, full chemical characterization of an endohedral metallo[60]fullerene was accomplished with lithium-containing [60]fullerene.

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Correspondence to Yutaka Matsuo .

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Matsuo, Y., Okada, H., Ueno, H. (2017). Introduction to Endohedral Fullerenes with the C60 Cage. In: Endohedral Lithium-containing Fullerenes. Springer, Singapore. https://doi.org/10.1007/978-981-10-5004-6_1

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