Doryokuro Kakunenryo Kaihatsu Jigyodan

Takeshi Takahashi

Takeshi Akasaka

Kazunori Yamamoto

Hideyuki Funasaka

Tatsuhisa Kato

Kaoru Kobayashi

Masayuki Yoneya

Shin-ichiro Torata

Kazuhiro Kawamura

Shigeru Nagase

Yusei Maruyama

Toshiyasu Suzuki

A novel metal-encapsulated fullerene compound wherein a side chain is introduced in a metal-encapsulated fullerene is provided. A metal-encapsulated fullerene compound represented by the following structural formula (1) is synthesized by causing a disilirane derivative or digermirane derivative having the following structural formula (2) to react with a metal-encapsulation fullerene so as to add functional groups to the fullerene. ##STR1## Herein, M is an encapsulated metal atom, m is an integer from 1 to 3, n is an even number from 28 to 200, and R is a t-butyl group or an aromatic group having alkyl groups in the 2,6-positions, such as mesityl, 2,6-diethylphenyl or 2,6-dimethylphenyl groups.

Metal-encapsulated fullerene compound and a method of synthesizing such

There are provided a derivative of a metal-encapsulated fullerene having application as a functional material, superconducting material, electronics material or pharmaceutical material, and a method of synthesizing this derivative. The derivative of a metal-encapsulated fullerene having the following structure is synthesized by adding a substituted diazomethane to a metal-encapsulated fullerene and denitrifying in a solvent. ##STR1##

Metal-encapsulated fullerene derivative compound of and method for

A method of recovering volatile ruthenium, which is separated and formed by constant potential electrolysis from high-level radioactive liquid waste discharged from the reprocessing step of spent nuclear fuel by purex process, in the form of stable solid. The method comprises electrolyzing at a constant potential a high-level radioactive liquid waste from which palladium has substantially been removed in advance, thereby vaporizing ruthenium, bringing the vaporized ruthenium into contact with an aqueous solution of formic acid to precipitate ruthenium oxide, and separating the precipitate from the aqueous solution of formic acid.

Method of separating and recovering ruthenium from high-level

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Hitachinaka, Japan

Takeshi Takahashi