Journal ArticleDOI
Functionalization of single-walled carbon nanotubes with well-defined polystyrene by "click" coupling.
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Thermogravimetric analysis indicated that the polymer-functionalized SWNTs consisted of 45% polymer, amounting to approximately one polymer chain for every 200-700 carbons of the nanotubes, depending on polymer molecular weight.Abstract:
Covalent functionalization of alkyne-decorated SWNTs with well-defined, azide-terminated polystyrene polymers was accomplished by the Cu(I)-catalyzed [3 + 2] Huisgen cycloaddition. This reaction was found to be extremely efficient in producing organosoluble polymer-nanotube conjugates, even at relatively low reaction temperatures (60 °C) and short reaction times (24 h). The reaction was found to be most effective when a CuI catalyst was employed in the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene as an additive. IR spectroscopy was utilized to follow the introduction and consumption of alkyne groups on the SWNTs, and Raman spectroscopy evidenced the conversion of a high proportion of sp2 carbons to sp3 hybridization during alkyne introduction. Thermogravimetric analysis indicated that the polymer-functionalized SWNTs consisted of 45% polymer, amounting to approximately one polymer chain for every 200−700 carbons of the nanotubes, depending on polymer molecular weight. Transmission electron microscopy an...read more
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Journal ArticleDOI
Cu-catalyzed azide-alkyne cycloaddition.
TL;DR: The basis for the unique properties and rate enhancement for triazole formation under Cu(1) catalysis should be found in the high ∆G of the reaction in combination with the low character of polarity of the dipole of the noncatalyzed thermal reaction, which leads to a considerable activation barrier.
Journal ArticleDOI
Carbon nanotube–polymer composites: Chemistry, processing, mechanical and electrical properties
TL;DR: In this paper, an extended account of the various chemical strategies for grafting polymers onto carbon nanotubes and the manufacturing of carbon-nanotube/polymer nanocomposites is given.
Journal ArticleDOI
The growing applications of click chemistry
John E. Moses,Adam D. Moorhouse +1 more
TL;DR: This tutorial review examines the copper(I)-catalysed 1,2,3-triazole forming reaction between azides and terminal alkynes, which has become the gold standard of click chemistry due to its reliability, specificity and biocompatibility.
Journal ArticleDOI
Polymer nanocomposites based on functionalized carbon nanotubes
TL;DR: There are several methods for the dispersion of CNTs in the polymer matrix such as solution mixing, melt mixing, electrospinning, in-situ polymerization and chemical functionalization of the carbon nanotubes as discussed by the authors.
Journal ArticleDOI
‘Click’ Chemistry in Polymer and Materials Science
TL;DR: The metal catalyzed azide/alkyne "click" reaction (a variation of the Huisgen 1,3-dipolar cycloaddition reaction between terminal acetylenes and azides) represents an important contribution towards this endeavor.
References
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Journal ArticleDOI
A stepwise huisgen cycloaddition process: copper(I)-catalyzed regioselective "ligation" of azides and terminal alkynes.
Journal ArticleDOI
Single-shell carbon nanotubes of 1-nm diameter
Sumio Iijima,Toshinari Ichihashi +1 more
TL;DR: In this article, the authors reported the synthesis of abundant single-shell tubes with diameters of about one nanometre, whereas the multi-shell nanotubes are formed on the carbon cathode.
Journal ArticleDOI
Peptidotriazoles on solid phase: [1,2,3]-triazoles by regiospecific copper(i)-catalyzed 1,3-dipolar cycloadditions of terminal alkynes to azides.
TL;DR: A novel regiospecific copper(I)-catalyzed 1,3-dipolar cycloaddition of terminal alkynes to azides on solid-phase is reported, and the X-ray structure of 2-azido-2-methylpropanoic acid has been solved, to yield structural information on the 1, 3-dipoles entering the reaction.
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Cobalt-catalysed growth of carbon nanotubes with single-atomic-layer walls
TL;DR: In this paper, it was shown that covaporizing carbon and cobalt in an arc generator leads to the formation of carbon nanotubes which all have very small diameters (about 1.2 nm) and walls only a single atomic layer thick.