Separation of single-walled carbon nanotubes with specific chiral indices and functionalization of the separated nanotubes

用芴基聚合物在甲苯中成功地萃取了大直径（dt> 1.3 nm）的半导体单壁碳纳米管（SWCNT）。特别地，聚（9，9-二辛基芴-alt-苯并噻二唑）显示出对（15，4）SWCNT的优异选择性。虽然已经讨论了芴主链和管表面之间的结构匹配的重要性，目前的光致发光研究表明，匹配芴基聚合物和单壁碳纳米管之间的能级是至关重要的选择性纳米管提取。

Semiconducting single-wall carbon nanotubes(SWCNT) having large diameters(dt> 1.3 nm) are successfully extracted in toluene by fluorene-based polymers. In particular, poly(9, 9-dioctylfluorene-alt-benzothiadiazole) shows excellent selectivity for(15, 4) SWCNT. Although the importance of structural matching between the fluorene backbone and the tube surface has already been discussed, the present photoluminescence studies reveal that matching the energy levels between fluorene-based polymers and SWCNT is crucial for selective nanotube extractions.