Size-Selective Formation of C78 Fullerene from a Three-Dimensional Polyyne Precursor
✍ Scribed by Yoshito Tobe; Rui Umeda; Motohiro Sonoda; Tomonari Wakabayashi
- Publisher
- John Wiley and Sons
- Year
- 2005
- Tongue
- English
- Weight
- 203 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0947-6539
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✦ Synopsis
Abstract
Multicyclic cagelike cyclophanes 2 a and 2 b containing cyclobutene rings have been prepared as precursors of three‐dimensional polyynes C~78~H~18~ (1 a) and C~78~H~12~Cl~6~ (1 b), respectively. Laser irradiation of 2 a and 2 b induced expulsion of the aromatic fragment, indane, to give the three‐dimensional polyyne anions C~78~H~18~^−^ and C~78~H~12~Cl~6~^−^, respectively. Whereas the former anion lost only four hydrogen atoms to form C~78~H~14~^−^, complete loss of all hydrogen and chlorine atoms was observed from the latter anion, to yield a C~78~^−^ ion that has a fullerene structure which was proven by its characteristic fragmentation pattern.