Soluble, Discrete Supramolecular Complexes of Single-Walled Carbon Nanotubes with Fluorene-Based Conjugated Polymers

Cheng, Fuyong; Imin, Patigul; Maunders, Christian; Botton, Gianluigi A.; Adronov, Alex

doi:10.1021/ma702567y

Cited by 117 publications

(109 citation statements)

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“…This method consists of three steps: dispersion of nanotubes in a suitable solvent, mixing with the polymer (at room temperature or elevated temperature) and recovery of the nanocomposite by precipitating or casting a film. Both organic and aqueous medium have been used to produce CNT/polymer nanocomposites [Bandyopadhyaya, 2002;Pei, 2008;Wu, 2007;Cheng, 2008]. In this method dispersion of nanotube can be achieved by magnetic stirring, shear mixing, reflux or most commonly, ultrasonication.…”

Section: Processing Of Cnt/polymer Nanocompositesmentioning

confidence: 99%

Polymer/Carbon Nanotube Nanocomposites

Choudhary¹,

Gupta²

2011

Carbon Nanotubes - Polymer Nanocomposites

104

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Section: Processing Of Cnt/polymer Nanocompositesmentioning

confidence: 99%

Polymer/Carbon Nanotube Nanocomposites

Choudhary¹,

Gupta²

2011

Carbon Nanotubes - Polymer Nanocomposites

104

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“…42,60 In addition to polymerization of the three coumarin-decorated monomers, a model polymer (P1) with no coumarin decoration was also prepared using the commercially available 9,9=-dioctyl-2,7-dibromofluorene as a model monomer. Each of the coumarin-decorated copolymers, P2-P4, exhibited moderate solubility in common organic solvents, such as THF, CHCl 3 , and toluene.…”

Section: Resultsmentioning

confidence: 99%

“…It has also been found that the fluorescence of conjugated polymers that are bound to the nanotube surface is efficiently quenched through energy or electron transfer to the nanotube. [42][43][44] This suggests that decoration of SWNTs with conjugated polymers can result in a light-harvesting assembly where the polymer absorbs photons and transfers their energy to the nanotube. However, individual conjugated polymers exhibit relatively narrow absorption bands, limiting their capacity to harvest light.…”

Section: Introductionmentioning

confidence: 99%

π-Conjugated polymers with pendant coumarins: design, synthesis, characterization, and interactions with carbon nanotubes

2016

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A series of new fluorene-based -conjugated polymers having coumarin derivatives as part of dendritic side chains were designed and prepared using the Suzuki-Miyaura cross-coupling reaction. A new coumarin derivative bearing a heptyl side chain for solubility was utilized to ensure solubility of the final polymers. It was found that fluorescence resonance energy transfer (FRET) from the coumrains to the polyfluorene backbone was efficient, especially for the polymers decorated with lower-generation dendrons. Each of the polymers was found to interact strongly with the surface of single-walled carbon nanotubes (SWNTs) in THF, and their ability to selectively disperse specific SWNT chiralities was investigated. Photoluminescence studies revealed that the strong polymer emission is efficiently quenched in the corresponding supramolecular complexes with SWNTs. This high quenching efficiency indicates that the coumarin-polymer FRET system can be supramolecularly bound to the surface of (SWNTs to produce an energy transfer system in which the energy absorbed by the donor coumarin chromophores is channeled to the SWNTs.Key words: conjugated polymer, carbon nanotubes, energy transfer, light harvesting.Résumé : Nous avons conçu une série de nouveaux polymères -conjugués à base de fluorène possédant des ramifications dendritiques constituées de dérivés de la coumarine. Nous avons synthétisé ces composés par couplage croisé de Suzuki-Miyaura. Nous avons utilisé un nouveau dérivé de coumarine possédant une chaîne latérale heptyle soluble en vue d'assurer la solubilité des polymères finaux. Les résultats ont révélé que le transfert d'énergie de fluorescence par résonance (FRET) des coumarines au squelette de polyfluorène était efficace, particulièrement pour les polymères substitués par des dendrons de génération inférieure. Chacun des polymères a présenté une forte interaction avec la surface de nanotubes de carbone à simple paroi (NTSP) dans le THF. En outre, nous avons étudié leur capacité à disperser sélectivement les NTSP de chiralité spécifique. Les résultats d'études de photoluminescence ont révélé que l'intense émission des polymères subit une extinction efficace dans les complexes supramoléculaires de NTSP correspondants. L'efficacité de cette extinction indique que le système de FRET de coumarines aux polymères peut être lié de façon supramoléculaire à la surface des NTSP pour constituer un système de transfert d'énergie dans lequel l'énergie absorbée par les chromophores coumariniques donneurs est canalisée dans les NTSP. [Traduit par la Rédaction] Mots-clés : polymère conjugué, nanotubes de carbone, transfert d'énergie, antenne collectrice.

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“…Usually, wrapping polymer consists of aromatic groups on main chain or substitutional groups. For example, polyvinyl pyrrolidone (PVP) or polystyrene sulfonate (PSS) wrapped CNT shows improved dispersity and electrical properties compared to those of the individual components (Cheng et al, 2008).…”

Section: Non-covalent Functionalizationmentioning

confidence: 99%