Comparative study of the extraction selectivity of PFO-BPy and PCz for small to large diameter single-walled carbon nanotubes  

作　　者：Fang Liu Xingxing Chen Meiqi Xi Nan Wei Lan Bai Lianmao Peng Yu Cao Xuelei Liang 

机构地区：[1]Center for Carbon-Based Electronics,Peking University,Beijing 100871,China [2]Key Laboratory for the Physics and Chemistry of Nanodevices,School of Electronics,Peking University,Beijing 100871,China [3]Shanxi Institute for Carbon-Based Thin Film Electronics,Peking University(SICTFE-PKU),Taiyuan 030012,China [4]Taiyuan Laboratory for Carbon-Based Thin Film Electronics,Taiyuan 030012,China

出　　处：《Nano Research》2022年第9期8479-8485,共7页纳米研究(英文版)

基　　金：the National Natural Science Foundation of China(Nos.U21A6004 and 51991341);Science and Technology Major Project of Shanxi(No.202101030201022);Young Talents Program of Beijing(No.2018000020028G349)。

摘　　要：Semiconducting single-walled carbon nanotubes(s-SWCNTs)are fascinating materials for future electronic and optical applications.Conjugated polymer wrapping is one of the most promising methods for mass production of high purity s-SWCNTs.However,its chiral selectivity is relatively inferior to other s-SWCNT production methods.In this paper,the chiral selectivity of two polymers,poly[(9,9-dioctylfluorenyl-2,7-diyl)-alt-co-(6,6′-{2,2′-bipyridine})](PFO-BPy)and poly[9-(1-octylonoyl)-9H-carbazole-2,7-diyl](PCz),which are representatives of widely used polyfluorene and polycarbazole families,respectively,were comparatively studied.Both polymers exhibited high selectivity for a subset of existing chiral species in each of the commercially available raw SWCNT materials(CoMoCAT,HiPco,and arc-discharge)which cover a diameter range of 0.6–1.8 nm.Less chiral species were selected by PFO-BPy from small diameter(<1 nm)raw SWCNT materials,while more from large diameter(>1.2 nm)raw materials.High chiral purity(6,5)(>99%)and(7,5)(>75%)solutions were extracted by PFO-BPy and PCz from CoMoCAT materials,respectively.The different chiral angle and diameter selections for different raw materials by both polymers were ascribed to their different geometrical structures and related polymer-tube interactions.Our work provides indispensable information for better understanding the mechanism of polymer wrapping method and improving extraction of single chirality sSWCNTs.

关 键 词：carbon nanotube polymer wrapping poly[(9 9-dioctylfluorenyl-2 7-diyl)-alt-co-(6 6′-{2 2′-bipyridine})](PFO-BPy) poly[9-(1-octylonoyl)-9H-carbazole-2 7-diyl](PCz) chiral selectivity 

分 类 号：O62[理学—有机化学]