Effects of the chemical structure of polyfluorene on selective extraction of semiconducting single-walled carbon nanotubes

Takahiro Fukumaru, Fumiyuki Toshimitsu, Tsuyohiko Fujigaya, Naotoshi Nakashima

    Research output: Contribution to journalArticlepeer-review

    31 Citations (Scopus)

    Abstract

    The selective recognition/extraction of semiconducting (sem)- and metallic (met)-single-walled carbon nanotubes (SWNTs) is still a great challenge in the science and technology of carbon nanotubes because their selective synthesis is still difficult. Poly(9,9-dioctyl-fluorene-2,7-diyl) (2C8-PF) and its derivatives are widely used polymers in carbon nanotube science and technology since they only extract sem-SWNTs from the mixture of sem-/met-SWNTs, while the separation mechanism is still unclear. In this study, we focus on the alkyl chain number on the polyfluorenes (PFs) to understand the mechanism for selective recognition. Here we describe the synthesis of mono-octyl moiety-carrying polyfluorene (poly(9-octyl-9H-fluorene-2,7-diyl), C8H-PF), and characterized its selective SWNT recognition/extraction ability, and found that the C8H-PF solubilized sem-SWNTs with a diameter of 0.9-1.1 nm, whose behavior is similar to that of 2C8-PF. In addition, C8H-PF selectively extracted sem-SWNTs with larger diameters (average diameter = 1.4 nm), whose behavior is different from that of 2C8-PF. Molecular mechanics simulations were carried out to understand such specific solubilization behavior. This study provides an insight into the design and synthesis of PF-based polymers and copolymers that exhibit efficient selective sem-SWNT recognition/extraction ability and their applications.

    Original languageEnglish
    Pages (from-to)5879-5886
    Number of pages8
    JournalNanoscale
    Volume6
    Issue number11
    DOIs
    Publication statusPublished - Jun 7 2014

    All Science Journal Classification (ASJC) codes

    • General Materials Science

    Fingerprint

    Dive into the research topics of 'Effects of the chemical structure of polyfluorene on selective extraction of semiconducting single-walled carbon nanotubes'. Together they form a unique fingerprint.

    Cite this