Mono-Acetylenes as New Crosslinkers for All-Carbon Living Charge Carbon Nanotubide Organogels

Mustafa Bayazit, Hin Chun Yau, Hannah Leese, Won Jun Lee, Milo Shaffer

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Abstract

Nanomaterials, such as single-walled carbon nanotubes (SWCNTs) and graphenes, can be readily gelled using bi- or multi-functional reagents as crosslinkers. This study reports a new reaction of monofunctional acetylenes with negatively charged SWCNTs (nanotubides), prepared by reduction. Mono-acetylenes (e. g. phenylacetylene (PAc) and diphenyl acetylene (DiPAc)) are introduced as crosslinkers to form all-carbon SWCNT organogels at room temperature. The resulting isolated SWCNT aerogels have a density of ∼4.5–5.5 mg cm−3. Raman spectroscopy and thermogravimetric analysis suggest a covalent surface modification (∼1 functional group per 110 (PAc) and 712 (DiPAc) SWCNT carbon atoms). Significantly, the acetylene reaction does not consume all available negative charges. The SWCNT organogel is still reactive after crosslinking and can reduce a stable gold complex, chloro(triphenylphosphine)gold (I), to form AuNPs (∼12–14 nm), suggesting the formation of a living nanotubide organogel intermediate, suitable for a range of secondary reactions. Mono-acetylenes can crosslink other negatively charged molecular systems, and surface decoration of the aerogels with other metal NPs is anticipated.
Original languageEnglish
Article numbere202202469
JournalChemistrySelect
Volume7
Issue number30
DOIs
Publication statusPublished - 10 Aug 2022

Funding

The authors would like to thank EPSRC EP/G007314/1 and EP/L001896/1 for funding this project. We also acknowledge the Sabanci University Nanotechnology Research and Application Center (I.A.SN-19-00004) for partial research funding.

Keywords

  • All-Carbon Aerogels
  • Living Charge Nanotubide Organogel
  • Monoacetylene crosslinkers
  • Radical Reactions
  • Single-Walled Carbon Nanotubes

ASJC Scopus subject areas

  • General Chemistry

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