The effect of molecular weight on the supramolecular interaction between a conjugated polymer and single-walled carbon nanotubes

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DOIResolve DOI: http://doi.org/10.1039/c1py00023c
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TypeArticle
Journal titlePolymer Chemistry
ISSN1759-9954
Volume2
Issue6
Pages14041408; # of pages: 5
Subject9 ,9-dioctylfluorene; Absorption and fluorescence spectroscopy; Nanotube concentration; Polymer samples; Supramolecular interactions; Tetra-hydrofuran; Absorption spectroscopy; Chromatographic analysis; Complexation; Conjugated polymers; Fluorescence spectroscopy; Gel permeation chromatography; Magnetic resonance; Molecular weight; Nuclear magnetic resonance spectroscopy; Size exclusion chromatography; Single-walled carbon nanotubes (SWCN)
AbstractThe synthesis and fractionation of poly[2,7-(9,9-dioctylfluorene)-alt-2,5- (3-dodecylthiophene)] resulted in the isolation of eight different molecular weight (M w) samples ranging from M n of 5 to 85 kg mol -1. These individual polymer samples were fully characterized by Gel Permeation Chromatography, Nuclear Magnetic Resonance, as well as absorption and fluorescence spectroscopy. Each sample was separately mixed and ultrasonicated with single-walled carbon nanotubes (SWNTs) in tetrahydrofuran, and the nanotube concentration within the resulting solutions was measured. It was found that the solubility of the polymer-SWNT complexes strongly depends on the M w of the conjugated polymer, with a maximum concentration reached when M w ranged between 10 and 35 kg mol -1. Higher and lower M ws resulted in substantially reduced nanotube concentrations. © 2011 The Royal Society of Chemistry.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Steacie Institute for Molecular Sciences (SIMS-ISSM)
Peer reviewedYes
NPARC number21271176
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Record identifier6594ef28-b855-414f-acfd-ff582c661e00
Record created2014-03-24
Record modified2016-05-09
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