simple ingestion mechanism small fullerenes form and ingest others carbon species (linear, rings...

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Simple Ingestion Mechanism Small Fullerenes form and ingest others carbon species (linear, rings etc) to form larger fullerenes C 60 is the first stable species and C 70 the next – they are partial cul-de-sacs Some further ingestion occurs to form larger Fullerenes

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Page 1: Simple Ingestion Mechanism Small Fullerenes form and ingest others carbon species (linear, rings etc) to form larger fullerenes C 60 is the first stable

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

Page 2: Simple Ingestion Mechanism Small Fullerenes form and ingest others carbon species (linear, rings etc) to form larger fullerenes C 60 is the first stable

Exxon DataCox et al JACS 1101588 (1988)

Sussex NNC

Assignment

Page 8: Simple Ingestion Mechanism Small Fullerenes form and ingest others carbon species (linear, rings etc) to form larger fullerenes C 60 is the first stable

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+

*

Page 10: Simple Ingestion Mechanism Small Fullerenes form and ingest others carbon species (linear, rings etc) to form larger fullerenes C 60 is the first stable

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

Page 11: Simple Ingestion Mechanism Small Fullerenes form and ingest others carbon species (linear, rings etc) to form larger fullerenes C 60 is the first stable

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+

Page 12: Simple Ingestion Mechanism Small Fullerenes form and ingest others carbon species (linear, rings etc) to form larger fullerenes C 60 is the first stable

5x6 C atoms in

ring

C21+

C60+

500 1000

C70+

2000

2500

1500

Page 13: Simple Ingestion Mechanism Small Fullerenes form and ingest others carbon species (linear, rings etc) to form larger fullerenes C 60 is the first stable

18 C atoms

Page 15: Simple Ingestion Mechanism Small Fullerenes form and ingest others carbon species (linear, rings etc) to form larger fullerenes C 60 is the first stable

C88 is strong ???

Page 16: Simple Ingestion Mechanism Small Fullerenes form and ingest others carbon species (linear, rings etc) to form larger fullerenes C 60 is the first stable

4C18 C72*

C88 is strong ???

Page 17: Simple Ingestion Mechanism Small Fullerenes form and ingest others carbon species (linear, rings etc) to form larger fullerenes C 60 is the first stable

4C18 C72* C70- C2

C88 is strong ???

Page 18: Simple Ingestion Mechanism Small Fullerenes form and ingest others carbon species (linear, rings etc) to form larger fullerenes C 60 is the first stable

4C18 C72* C70 C88

C18

- C2

C88 is strong ???

Page 21: Simple Ingestion Mechanism Small Fullerenes form and ingest others carbon species (linear, rings etc) to form larger fullerenes C 60 is the first stable
Page 26: Simple Ingestion Mechanism Small Fullerenes form and ingest others carbon species (linear, rings etc) to form larger fullerenes C 60 is the first stable
Page 27: Simple Ingestion Mechanism Small Fullerenes form and ingest others carbon species (linear, rings etc) to form larger fullerenes C 60 is the first stable
Page 28: Simple Ingestion Mechanism Small Fullerenes form and ingest others carbon species (linear, rings etc) to form larger fullerenes C 60 is the first stable
Page 29: Simple Ingestion Mechanism Small Fullerenes form and ingest others carbon species (linear, rings etc) to form larger fullerenes C 60 is the first stable
Page 30: Simple Ingestion Mechanism Small Fullerenes form and ingest others carbon species (linear, rings etc) to form larger fullerenes C 60 is the first stable

C132+

C60+

500 1000

C70+

2000

2500

1500

C160+

C214+

C264+

C336+

Page 31: Simple Ingestion Mechanism Small Fullerenes form and ingest others carbon species (linear, rings etc) to form larger fullerenes C 60 is the first stable

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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