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US5869626A
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Metal-encapsulated fullerene compound and a method of synthesizing such compound
Assignee: Doryokuro Kakunenryo Kaihatsu Jigyodan
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Filing: 1996-02-26
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Granted: 1999-02-09
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Expires: 2016-02-26
Abstract
Abstract 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.
Inventors
- 👤 Kazunori Yamamoto
- 👤 Hideyuki Funasaka
- 👤 Takeshi Takahashi
- 👤 Takeshi Akasaka
- 👤 Tatsuhisa Kato
- 👤 Shigeru Nagase
- 👤 Kaoru Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:07
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0803; C07F7/0805; C07F7/0807; Y; Y10; Y10S; Y10S977/00; Y10S977/70; Y10S977/734
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
78 words
A metal-encapsulated fullerene compound having the following structure: ##STR9## where A is a silicon or germanium atom, M is an encapsulated metal atom, m is an integer from 1 to 3, M m @C n represents a metal-encapsulated fullerene contained as part of said structure (1), n is an even number from 28 to 200, and R is an organic substituent selected from the group consisting of a stereochemically bulky alkyl group and a stereochemically bulky aryl group.
Claim 2
Dependent Claim
78 words
A metal-encapsulated fullerene compound having the following structure: ##STR9## where A is a silicon or germanium atom, M is an encapsulated metal atom, m is an integer from 1 to 3, M m @C n represents a metal-encapsulated fullerene contained as part of said structure (1), n is an even number from 28 to 200, and R is an organic substituent selected from the group consisting of a stereochemically bulky alkyl group and a stereochemically bulky aryl group.
Claim 3
Dependent Claim
39 words
A metal-encapsulated fullerene compound as defined in claim 1 wherein: said encapsulated metal atom M is at least one element selected from the group consisting of lanthanoid elements, actinoid elements, transition elements, alkali metal elements and alkaline-earth metal elements.
Claim 4
Dependent Claim
20 words
A metal-encapsulated fullerene compound as defined in claim 1 wherein: said encapsulated metal atom M is a radioactive metal element.
Claim 5
Independent Claim
176 words
A method of synthesizing a metal-encapsulated fullcrene compound by adding functional groups to a metal-encapsulated fullerene, comprising reacting a disilirane derivative or digermiranc derivative having the following structure (2) ##STR10## with a metal encapsulated fullerene to produce said compound, wherein said compound has the following structure (1) ##STR11## wherein in structure (1): A is a silicon or germanium atom, R is an organic substituent selected from the group consisting of a stereochemically bulky alkyl group and a stereochemically bulky aryl group, M is an encapsulated metal atom. m is an integer from 1 to 3, M m @C n represents a metal-encapsulated fullerene contained as a part of said structure (1), and n is an even number from 28 to 200, and wherein in structure (2): A is a silicon or gennanium atom, and R is an organic substituent selected from the group consisting of a stereochemically bulky alkyl group and a stereochemically bulky aryl group which protects and stabilizes the ring comprising two of said A atoms and the methylene bridge of said structure (2).
Claim 6
Independent Claim
176 words
A method of synthesizing a metal-encapsulated fullcrene compound by adding functional groups to a metal-encapsulated fullerene, comprising reacting a disilirane derivative or digermiranc derivative having the following structure (2) ##STR10## with a metal encapsulated fullerene to produce said compound, wherein said compound has the following structure (1) ##STR11## wherein in structure (1): A is a silicon or germanium atom, R is an organic substituent selected from the group consisting of a stereochemically bulky alkyl group and a stereochemically bulky aryl group, M is an encapsulated metal atom. m is an integer from 1 to 3, M m @C n represents a metal-encapsulated fullerene contained as a part of said structure (1), and n is an even number from 28 to 200, and wherein in structure (2): A is a silicon or gennanium atom, and R is an organic substituent selected from the group consisting of a stereochemically bulky alkyl group and a stereochemically bulky aryl group which protects and stabilizes the ring comprising two of said A atoms and the methylene bridge of said structure (2).
Claim 7
Dependent Claim
45 words
A method of synthesizing a metal-encapsulated fullerene compound as defined in claim 4, wherein a metal encapsulated in said metal-encapsulated fullerene is at least one element selected from the group consisting of lanthanoid elements, actinoid elements, transition elements, alkali metal elements and alkaline-earth metal elements.
Claim 8
Dependent Claim
26 words
A method of synthesizing a metal-encapsulated fullerene compound as defined in claim 4, wherein a metal encapsulated in said metal-encapsulated fullerene is a radioactive metal element.
Claim 9
Dependent Claim
40 words
A method of synthesizing a metal-encapsulated fullerene compound as defined in claim 4, wherein said metal-encapsulated fullerene compound and said disilirane derivative or digermirane derivative are dissolved in an aromatic hydrocarbon reaction solvent or a halogenated aromatic hydrocarbon reaction solvent.
Claim 10
Dependent Claim
62 words
A method of synthesizing a metal-encapsulated fullerene compound as defined in claim 4, further comprising: dissolving said metal-encapsulated fullerene and said disilirane derivative or digermirane derivative in a reaction solvent to form a reactant solution, removing dissolved gas from said reactant solution by freeze degassing, and reacting said disilirane derivative or digermirane derivative with said metal-encapsulated fullerene by irradiating said reactant solution.
Claim 11
Dependent Claim
30 words
A method of synthesizing a metal-encapsulated fullerene compound as defined in claim 8, wherein said reacting is accomplished by irradiation with light having a wavelength of at least 400 nm.
Claim 12
Dependent Claim
66 words
A method of synthesizing a metal-encapsulated fullerene compound as defined in claim 4, further comprising: dissolving said metal-encapsulated fullerene and said disilirane derivative or digermirane derivative in a reaction solvent to form a reactant solution, removing dissolved gas from said reactant solution by freeze degassing, and heating said reactant solution to react said disilirane derivative or digermirane derivative with said metal-encapsulated fullerene in said reactant solution.
References Cited (Backward Citations)
US5386048A
Cited
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