Synergistic p-doping of polymer-wrapped small-diameter single-walled carbon nanotubes by tris(pentafluorophenyl)borane
Despite its comparatively low electron affinity, tris(pentafluorophenyl)borane (BCF) has been widely explored as an efficient molecular p-dopant for semiconducting polymers through the formation of Brønsted acidic complexes as well as its high affinity toward Lewis-basic nitrogen moieties. Many conj...
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| Main Authors: | , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
20 March 2025
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| In: |
The journal of physical chemistry. C, Energy, materials, and catalysis
Year: 2025, Volume: 129, Issue: 11, Pages: 5520-5529 |
| ISSN: | 1932-7455 |
| DOI: | 10.1021/acs.jpcc.4c08584 |
| Online Access: | Verlag, kostenfrei, Volltext: https://doi.org/10.1021/acs.jpcc.4c08584 Verlag, kostenfrei, Volltext: https://pubs.acs.org/doi/10.1021/acs.jpcc.4c08584 
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| Author Notes: | Sebastian Lindenthal, Daniel Rippel, Lucas Kistner, Angus Hawkey, and Jana Zaumseil |
| Summary: | Despite its comparatively low electron affinity, tris(pentafluorophenyl)borane (BCF) has been widely explored as an efficient molecular p-dopant for semiconducting polymers through the formation of Brønsted acidic complexes as well as its high affinity toward Lewis-basic nitrogen moieties. Many conjugated polymers that are used for selective wrapping and dispersion of semiconducting single-walled carbon nanotubes (SWCNTs) such as poly[(9,9-di-n-octylfluorenyl-2,7-diyl)-alt-(6,6′-(2,2′-bipyridine))] (PFO-BPy) contain nitrogen moieties that should promote interaction with BCF. Here, we demonstrate that BCF indeed efficiently p-dopes even small-diameter (6,5) SWCNTs that are wrapped with large-bandgap PFO-BPy as corroborated by bleaching of the main absorption peaks and the appearance of red-shifted trion absorption and emission. In contrast, SWCNTs that are wrapped with poly(9,9-di-n-octylfluorenyl-2,7-diyl) (PFO) without any Lewis-basic nitrogen moieties are only mildly doped. UV-Vis-NIR absorption, 19F NMR, and 11B NMR spectra confirm that BCF dopes the bipyridine-containing PFO-BPy but not PFO, thus leading to a proposed doping mechanism that relies on the unique interactions between BCF, the bipyridine moieties in PFO-BPy, and the nanotubes. Since BCF doping of PFO-BPy-wrapped (6,5) SWCNTs is more efficient than doping with F4TCNQ and more stable than doping with AuCl3, it provides a reliable alternative for spectroscopic studies of the interactions of charge carriers and excitons in SWCNTs. |
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| Item Description: | Online verfügbar: 05.März 2025 Gesehen am 12.08.2025 |
| Physical Description: | Online Resource |
| ISSN: | 1932-7455 |
| DOI: | 10.1021/acs.jpcc.4c08584 |