Chen Fuming, Wang Bo, Chen Yuan, Li Lain-Jong
School of Materials Science and Engineering, Nanyang Technological University 50, Nanyang Avenue, Singapore 637819.
Nano Lett. 2007 Oct;7(10):3013-7. doi: 10.1021/nl071349o. Epub 2007 Sep 15.
High purity of (7,5) SWNTs (approximately 79% of the semisonducting SWNT ensemble) can be obtained by polymer-assisted extraction from the narrow-diameter distributed SWNTs produced by the catalyst Co-MCM-41. The fluorene-based polymers are able to selectively wrap the single-walled carbon nanotubes (SWNTs) with certain chiral angles or diameters depending on their chemical structures. Poly(9,9-dioctyfluoreny1-2, 7-diyl) and poly[(9,9-dihexylfluorenyl-2,7-diyl)-co-(9,10-anthracene)] selectively wrap SWNTs with high chiral angles (>24.5 degrees). By contrast, poly[9,9-dioctylfluorenyl-2,7-diyl)-co-1,4-benzo-{2,1'-3}-thiadiazole)] preferentially wraps the SWNTs with certain diameter (1.02-1.06 nm).
通过聚合物辅助萃取法，可从由催化剂Co-MCM-41制备的窄直径分布单壁碳纳米管（SWNTs）中获得高纯度的（7,5）SWNTs（约占半导体SWNT集合体的79%）。芴基聚合物能够根据其化学结构，选择性地包裹具有特定手性角或直径的单壁碳纳米管（SWNTs）。聚（9,9-二辛基芴-2,7-二基）和聚[（9,9-二己基芴-2,7-二基）-co-（9,10-蒽）]选择性地包裹高螺旋角（>24.5度）的SWNTs。相比之下，聚[9,9-二辛基芴-2,7-二基）-co-1,4-苯并-{2,1'-3}-噻二唑]则优先包裹具有特定直径（1.02-1.06纳米）的SWNTs。
