Synthesis and Characterization of Molecularly-Bridged Single-Walled Carbon Nanotubes and Electrical Properties of Their Films

Jombert, A.S.; Bayazit, Mustafa K.; Herron, Christopher R.; Coleman, Karl S.; Zeze, Dagou A.

doi:10.1166/sam.2013.1664

Cited by 6 publications

(1 citation statement)

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“…[8] Most physical gelation strategies rely on the non-covalent interaction of bi-and multi-functional bridging molecules/polymers with CNMs (e. g. ferrocene-grafted poly(p-phenyleneethynylene)s [9] and oligo(p-phenylene vinylene)s [10] etc.). In contrast, covalent strategies exploit chemical reactions between surface-modified CNMs and biand multi-functional organic/inorganic cross-linkers (e. g. diazidocarbonates, [11] 1,2-dibromoethane, [12] 1,4-diethynyl compounds, [13] 1,2-diphenyl-diacetylene, [14] ethylenediamine, [15] poly(allylamine) [16] and cis-[Pt(dmso) 2 Cl 2 ] [17] etc.). Direct and spacer-free crosslinking of surface-modified single-walled carbon nanotubes (SWCNTs) containing multiple reactive free radicals generated by reductive defluorination of highly fluorinated SWCNTs was reported under ambient temperature through inter-tube radical recombination.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2022

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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.

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Section: Introductionmentioning

confidence: 99%

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

et al. 2022

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Controlling the Degree of Functionalization: In‐Depth Quantification and Side‐Product Analysis of Diazonium Chemistry on SWCNTs

Schirowski

Hauke

Hirsch

2019

Chemistry A European J

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We present an in‐depth qualitative and quantitative analysis of a reaction between 4‐iodobenzenediazonium tetrafluoroborate and single‐walled carbon nanotubes (SWCNTs) via thermogravimetric analysis coupled with mass spectrometry (TG‐MS) or a gas chromatography and mass spectrometry (TG‐GC‐MS) as well as Raman spectroscopy. We propose a method for precise determination of the degree of functionalization and quantification of physisorbed aromates, detaching around their boiling point, alongside covalently bonded ones (cleavage over 200 °C). While the presence of some side products like phenol‐ or biphenyl species could be excluded, residual surfactant and minor amounts of benzene could be identified. A concentration‐dependent experiment shows that the degree of functionalization increases with the logarithm of the concentration of applied diazonium salt, which can be exploited to precisely adjust the amount of aryl addends on the nanotube sidewall, up to 1 moiety per 100 carbon atoms.

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Platinum(II)‐Coordinated Pyridine‐Functionalized Single‐Wall Carbon Nanotubes and Electron Transport in Their Films

et al. 2015

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Carbon nanotubes (CNTs) are ideal support materials for platinum in fuel cells. However,l ittle is known about the conduction mechanism of Pt-coordinated CNTs. Herein, ac oordination complexo fp yridine-functionalized singlewalled nanotubes (Py-SWNTs) with Pt (Pt/Py-SWNTs) was prepared via the ligand exchange reaction between cis-[Pt(dmso) 2 Cl 2 ]a nd Py-SWNTsg enerated by pyridine diazonium salt addition to SWNTs. The presence of Pt in modified SWNTsw as confirmed by X-ray photoelectron spectroscopy (XPS). The N1 sX PS spectra provided evidence of Pt coordination to the pyridine nitrogen atom. Modified SWNTsw ere furtherc haracterized by thermogravimetric analysisc oupled with mass spectrometry,u ltraviolet-visible-near infrared spectroscopy,R amans pectroscopy,a nd elemental analysis. The electron conduction mechanism of Pt/Py-SWNT films was bestd escribed by am odified quantum tunneling model,i dentified from ac ombined analysis of the voltage and temperature dependence of the current.

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Synthesis and Characterization of Molecularly-Bridged Single-Walled Carbon Nanotubes and Electrical Properties of Their Films

Cited by 6 publications

References 0 publications

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

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

Controlling the Degree of Functionalization: In‐Depth Quantification and Side‐Product Analysis of Diazonium Chemistry on SWCNTs

Platinum(II)‐Coordinated Pyridine‐Functionalized Single‐Wall Carbon Nanotubes and Electron Transport in Their Films

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