Bis(tert-butylpyrene) Nanotweezers and Nanocalipers: Enhanced Extraction and Recognition Abilities for Single-Walled Carbon Nanotubes

Autor:	A. F. M. Mustafizur Rahman, Yuji Kuwahara, Naoki Komatsu, Gang Liu, Takahide Kimura, Songpol Chaunchaiyakul
Rok vydání:	2013
Předmět:	Pyrenes Molecular Structure Nanotubes Carbon Organic Chemistry Extraction (chemistry) Substituent General Chemistry Carbon nanotube Porphyrin Combinatorial chemistry Catalysis law.invention Metal chemistry.chemical_compound chemistry law visual_art visual_art.visual_art_medium Combinatorial Chemistry Techniques Nanotechnology Organic chemistry Pyrene
Zdroj:	Chemistry - A European Journal. 19:16221-16230
ISSN:	0947-6539
DOI:	10.1002/chem.201302799
Popis:	We developed a host-guest methodology for separation of single-walled carbon nanotubes (SWNTs) according to the handedness, diameter and metallicity by the use of diporphyrin nanotweezers and nanocalipers. Although the pyrene has been frequently used to replace porphyrin, due to a similar affinity to the surface of SWNTs and better availability, the extraction and recognition abilities of dipyrene nanotweezers were not so good as those of diporphyrin ones as we reported previously. However, introduction of a tert-butyl substituent at the 7'-position of 2-pyrene is found to enhance the extraction and recognition abilities of dipyrene nanotweezers and nanocalipers. That is, (6,5)-SWNTs were obtained in high purity by use of bis(tert-butylpyrene) nanotweezers with a phenanthrene spacer and metallic SWNTs were highly enriched by use of bis(tert-butylpyrene) nanocalipers with a carbazole-anthracene-carbazole spacer.
Databáze:	OpenAIRE
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