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