Size-selective formation of C78 fullerene from a three-dimensional polyyne precursor
Size-selective formation of C78 fullerene from a three-dimensional polyyne precursor
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DOI：
10.1002/chem.200401040
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发表时间：
2005-02-18
影响因子：
4.3
通讯作者：
Wakabayashi, T
中科院分区：
文献类型：
--
作者：
Tobe, Y;Umeda, R;Wakabayashi, T
合成了含有环丁烯环的多环笼状环番2a和2b，分别作为三维聚炔C78H18(1a)和C78H12Cl6(1b)的前驱体。激光照射2a和2b导致芳香族碎片吲哚的排出，分别得到三维多炔阴离子C78H18-和C78H12Cl6-。前一种阴离子只失去四个氢原子形成C78H14-，而后一种阴离子完全失去了所有的氢和氯原子，生成了具有富勒烯结构的C-78(-)离子，其特征碎裂模式证明了这一点。
Multicyclic cagelike cyclophanes 2a and 2b containing cyclobutene rings have been prepared as precursors of three-dimensional polyynes C78H18 (1a) and C78H12Cl6 (1b), respectively. Laser irradiation of 2a and 2b induced expulsion of the aromatic fragment, indane, to give the three-dimensional polyyne anions C78H18- and C78H12Cl6-, respectively. Whereas the former anion lost only four hydrogen atoms to form C78H14-, 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.