Sorting and decoration of semiconducting single-walled carbon nanotubes the quaternization reaction.

A study for the selective separation and functionalization of alcohol-soluble semiconducting single-walled carbon nanotubes (sc-SWCNTs) is carried out by polymer main-chain engineering. Introducing tertiary amine groups endows the functionalized sc-SWCNTs with alcohol-soluble properties and introducing the pyrimidine rings allows to increase the selective purity of sc-SWCNTs. In this study, a series of poly[(9,9-dioctylfluorene)-2,7-(9,9-bis(3'-(,-dimethylamino)propyl)-fluorene)] --[2-methylpyrimidine-2,7-(9,9-dioctylfluorene)] (PFPy) are used for the selective dispersion of semiconducting single-walled carbon nanotubes, where and are the composition ratio of the copolymer.