High-Purity Semiconducting Single-Walled Carbon Nanotubes via Selective Dispersion in Solution Using Fully Conjugated Polytriarylamines

A new approach for polytriarylamine (PTAA)-assisted selective dispersion for single-walled carbon nanotubes (SWNTs) in a toluene solution has been developed. The triarylamine-based conjugated polymers are able to selectively wrap the SWNTs with specific chiral indices depending on their backbone str...

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Bibliographic Details
Published in:Macromolecules 2016-11, Vol.49 (22), p.8520-8529
Main Authors: Wang, Po-I, Tsai, Chou-Yi, Hsiao, Yung-Jou, Jiang, Jyh-Chiang, Liaw, Der-Jang
Format: Article
Language:English
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Summary:A new approach for polytriarylamine (PTAA)-assisted selective dispersion for single-walled carbon nanotubes (SWNTs) in a toluene solution has been developed. The triarylamine-based conjugated polymers are able to selectively wrap the SWNTs with specific chiral indices depending on their backbone structures (e.g., PTAA 12 , PTAA 12 -P, and PTAA 12 -BP) and side-chain functionality (e.g., PTAA 6 , PTAA 6 - alt -PTAA, and PTAA 12 - alt -PTAA). PTAA 12 exhibits highly selective wrapping for the (6,5) chirality from CoMoCAT (catalytic processes) SWNTs but low selectivity in a dispersion of HiPCO (high-pressure carbon monoxide) SWNTs. Therefore, the selection for HiPCO SWNTs has been further improved via PTAA 12 - alt -PTAA wrapping with alternating side chains and mainly exhibits a high affinity to (6,5) SWNTs with high chiral angles (≥24.5°). The wrapping conformation and binding energy of the polymer/(6,5) SWNTs were studied via molecular modeling, and the simulated results are in good agreement with the experimental data for the selective dispersion of (6,5) SWNTs.
ISSN:0024-9297
1520-5835
DOI:10.1021/acs.macromol.6b01991