Simple Ingestion Mechanism Small Fullerenes form and ingest others carbon species (linear, rings...

Simple Ingestion MechanismSmall Fullerenes form and ingest others carbon species (linear, rings etc) to form larger fullerenes C60 is the first stable species and C70 the next – they are partial cul-de-sacsSome further ingestion occurs to form larger Fullerenes

Exxon DataCox et al JACS 1101588 (1988)

Sussex NNC

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Laser vapourisation mass spectrum

McElvaney et al 1991

C18+

C36+ C50

+

C60+

C70+

C22O2+

C22O4+

200 300 400 500 600

700 800 900 1000

C54+

C72+

*

Laser vapourisation mass spectrum

McElvaney et al 1991

C18

C18+

C36+ C50

+

C60+

C70+

C22O2+

C22O4+

200 300 400 500 600

700 800 900 1000

C54+

C72+

*

n x 18 = 36, 54, 72, 90, 108 C atoms

4x6 = 24 C atoms24, 48, 72, 96

C36+

C60+

C70+

C24+

200 300 400 500 600 700 800 900 1000

C48+

C72+

100

C82+

C21+

C50+

5x6 C atoms in

ring

C21+

C60+

500 1000

C70+

2000

2500

1500

18 C atoms

70+1870+18+18

70+18+18+18

C88 is strong ???

4C18 C72*

C88 is strong ???

4C18 C72* C70- C2

C88 is strong ???

4C18 C72* C70 C88

C18

- C2

C88 is strong ???

70+24

C132+

C60+

500 1000

C70+

2000

2500

1500

C160+

C214+

C264+

C336+

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Cyclocarbon Coalescence: Mechanisms for Tailor-Made Fullerene Formation, by Stephen W. McElvany; Mark M. Ross; Nancy S. Goroff; Francois Diederich Science © 1993 American Association for the Advancement of Science

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