Diameter-based separation of single-walled carbon nanotubes through selective extraction with dipyrene nanotweezers
Diameter-based separation of single-walled carbon nanotubes through selective extraction with dipyrene nanotweezers
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DOI：
10.1039/c0sc00635a
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发表时间：
2011-01-01
期刊：
影响因子：
8.4
通讯作者：
Komatsu, Naoki
中科院分区：
文献类型：
--
作者：
Rahman, A. F. M. Mustafizur;Wang, Feng;Komatsu, Naoki
我们一直在发展主客体方法，根据手性和直径与gable-type手性双卟啉单壁碳纳米管（SWNTs）的分离。双卟啉纳米钳是由两个卟啉分子和刚性连接基团组成。作为我们的策略的延伸，已经设计了具有两个芘而不是卟啉的新型纳米镊子，因为芘已知对单壁碳纳米管表面具有高亲和力。芘纳米钳由两个1-或2-芘和3，6-咔唑与各种N-取代基组成。对于单壁碳纳米管的萃取，1-和2-芘纳米镊子显示出明显的对比：1-芘纳米镊子选择性地萃取直径范围为0.84 nm至0.97 nm的单壁碳纳米管，而2-芘纳米镊子根本不能萃取单壁碳纳米管。
We have been developing host-guest methodology for the separation of single-walled carbon nanotubes (SWNTs) according to handedness and diameter with gable-type chiral diporphyrins. The diporphyrins, designated as porphyrin nanotweezers, consist of two porphyrins and rigid spacer in between. As an extension of our strategy, novel nanotweezers having two pyrenes instead of porphyrins have been designed, because pyrene is known to have high affinity toward SWNT surface. The pyrene nanotweezers presented here consist of two 1- or 2-pyrenes and 3,6-carbazolylenes with various N-substituents. For the extraction of SWNTs, the 1- and 2-pyrene nanotweezers show a marked contrast: 1-pyrene nanotweezers selectively extract SWNTs with diameters ranging from 0.84 nm to 0.97 nm, while 2-pyrene nanotweezers are not able to extract SWNTs at all.