Selective extraction of higher fullerenes using cyclic dimers of zinc porphyrins
Selective extraction of higher fullerenes using cyclic dimers of zinc porphyrins
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DOI：
10.1021/ja0489947
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发表时间：
2004-06-02
影响因子：
15
通讯作者：
Aida, T
中科院分区：
文献类型：
--
作者：
Shoji, Y;Tashiro, K;Aida, T
通过β-未取代的卟啉锌配合物2C 5 − 2C 7与C5−C7亚烷基间隔基的环状二聚体作为主体分子，从基于燃烧的工业生产来源获得的富勒烯混合物中选择性地提取高级富勒烯（≥C76）。用2C 5 − 2C 7和2C 6（1C 6）的β-取代类似物对富勒烯混合物进行单次萃取以及用C60、C70和C96对2C 6和1C 6进行光谱滴定的结果表明，对更高富勒烯的主体选择性在很大程度上取决于卟啉单元的结构和主体空腔的大小。用最好的2C 6对富勒烯混合物进行连续的三级萃取，导致非常罕见的富勒烯C102−C110（<0.1绝对%）的大量富集，达到总富勒烯的82绝对%（C76−C114，99绝对%）（356 nm）。
Higher fullerenes (≥C76) were selectively extracted from a fullerene mixture obtained from a combustion-based industrial production source by cyclic dimers of β-unsubstituted porphyrin zinc complexes2C5−2C7with C5−C7 alkylene spacers as host molecules. Results of single extraction of the fullerene mixture with2C5−2C7together with a β-substituted analogue of2C6(1C6) and spectroscopic titration of2C6and1C6with C60, C70, and C96indicated that the host selectivity toward higher fullerenes is much dependent on the structure of the porphyrin units and the size of the host cavity. Sequential three-stage extraction of the fullerene mixture with the best-behaved2C6resulted in considerable enrichment in very rare fullerenes C102−C110(<0.1 abs %) up to 82 abs % (C76−C114, 99 abs %) (356 nm) of total fullerenes.