Interaction of Carbon Nanotubes and Small Molecules

Sampath, S.; Ajayaghosh, Ayyappanpillai

doi:10.1002/9781118095331.ch19

Cited by 6 publications

(3 citation statements)

References 116 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Their SWNTs hybrid absorption spectra are shown in Figure d. These spectra show multiple optical transitions from SWNTs, which confirm the presence of SWNTs in these hybrid complexes. − ,, We also prepared hybrid films of AN-C6 /SWNT and AN-C8 /SWNT. Compared to the X-ray diffraction patterns of the pristine polymer films, the hybrid polymers show a stronger diffraction intensity, thus suggesting that the presence of SWNTs enhances the crystallinity of the polymers (see Figure S24).…”

Section: Resultsmentioning

confidence: 56%

“…These spectra show multiple optical transitions from SWNTs, which further confirm the presence of SWNTs in the hybrid complexes. Similar multiple optical transitions of SWNTs were also observed in both small molecule/SWNT and polymer/SWNT hybrids. − ,, Plotting the absorption intensity of SWNTs at 1008 nm as a function of the length of the alkoxy side groups was used to track the approximate quantities of dispersed SWNTs in the hybrids.…”

Section: Resultsmentioning

confidence: 66%

See 1 more Smart Citation

Molecular Engineering of Polyphosphazenes and SWNT Hybrids with Potential Applications as Electronic Materials

Ren

Allcock

2018

Macromolecules

View full text Add to dashboard Cite

Polymer/single-walled carbon nanotube (SWNT) hybrids are promising candidates in applications such as flexible and stretchable electronics. In this contribution, we have examined structure–property relationships for constructing new polyphosphazene–SWNT hybrids. UV–vis and Raman spectroscopy studies revealed that the unique PN backbone enables strong intermolecular donor–acceptor interactions between the polymer and SNWTs. Furthermore, the polymeric backbone and the environment at the P-centers collectively play important roles in the formation of the hybrids. For polymers with shorter alkoxy substituents, the donor–acceptor interactions between the PN backbone and SWNTs play a crucial role in stabilizing the hybrid complexes, but for polymers with longer alkoxy substituents, the CH−π interactions and steric hindrance between the alkyl side chains and SWNTs counterbalance each other and control the stability of the hybrid complexes. Furthermore, the presence of fluorine and oxygen atoms is detrimental to the stability of the hybrid complexes. New cross-linkable polyphosphazenes with anthracene side units were also synthesized. When photo-cross-linked, these polyphosphazene/SWNT hybrids showed elastomeric characteristics and electronic properties that are promising for future applications.

show abstract

Section: Resultsmentioning

confidence: 56%

Section: Resultsmentioning

confidence: 66%

Molecular Engineering of Polyphosphazenes and SWNT Hybrids with Potential Applications as Electronic Materials

Ren

Allcock

2018

Macromolecules

View full text Add to dashboard Cite

show abstract

“…Pyrene-containing compounds have often been used for the noncovalent functionalization due to the very high affinity of pyrene toward the CNT surface. − Pyrene derivatives adsorb on the CNT surface via π–π interactions, preventing the formation of bundles and enabling its dispersion in solvents. , Apart from their use as noncovalent stabilizing units, pyrene derivatives were also used to anchor various systems to CNTs in diverse applications. Furthermore, the pyrene ring offers several possibilities of peripheral group modifications, which can affect the condensed-matter structure .…”

Section: Introductionmentioning

confidence: 99%

Effect of Organic Modification on Multiwalled Carbon Nanotube Dispersions in Highly Concentrated Emulsions

et al. 2019

View full text Add to dashboard Cite

Highly concentrated water-in-oil emulsions incorporating multiwalled carbon nanotubes (MWCNTs) are prepared. Homogeneous and selective dispersions of MWCNTs throughout the oil phase of the emulsions are investigated. The practical insolubility of carbon nanotubes (CNTs) in aqueous and organic media necessitates the disentanglement of CNT “agglomerates” through the utilization of functionalized CNTs. The design and synthesis of two tetra-alkylated pyrene derivatives, namely, 1,3,6,8-tetra(oct-1-yn-1-yl)pyrene ( TOPy ) and 1,3,6,8-tetra(dodec-1-yn-1-yl)pyrene ( TDPy ), for the noncovalent organic modification of MWCNTs are reported. The modifier molecules are designed in such a manner that they facilitate an improved dispersion of individualized MWCNTs in the continuous-oil phase of the highly concentrated emulsion (HCE). Transmission electron microscopic analyses suggest that the alkylated pyrene molecules are adsorbed on the MWCNT surface, and their adsorption eventually results in the debundling of MWCNT agglomerates. Fourier transform infrared, Raman, and fluorescence spectroscopic analyses confirm the π–π interaction between the alkylated pyrene molecules and MWCNTs. The noncovalent modification significantly improves the effective debundling and selective dispersion of MWCNTs in HCEs.

show abstract

Facile Supramolecular Processing of Carbon Nanotubes and Polymers for Electromechanical Sensors

et al. 2017

View full text Add to dashboard Cite

We herein report a facile, cost‐competitive, and scalable method for producing viscoelastic conductors via one‐pot melt‐blending using polymers and supramolecular gels composed of carbon nanotubes (CNTs), diphenylamine (DP), and benzophenone (BP). When mixed, a non‐volatile eutectic liquid (EL) produced by simply blending DP with BP (1:1 molar ratio) enabled not only the gelation of CNTs (EL‐CNTs) but also the dissolution of a number of commodity polymers. To make use of these advantages, viscoelastic conductors were produced via one‐pot melt‐blending the EL and CNTs with a model thermoplastic elastomer, poly(styrene‐b‐butadiene‐b‐styrene) (SBS, styrene 30 wt %). The resulting composites displayed an excellent electromechanical sensory along with re‐mendable properties. This simple method using cost‐competitive EL components is expected to provide an alternative to the use of expensive ionic liquids as well as to facilitate the fabrication of novel composites for various purposes.

show abstract

Interaction of Carbon Nanotubes and Small Molecules

Cited by 6 publications

References 116 publications

Molecular Engineering of Polyphosphazenes and SWNT Hybrids with Potential Applications as Electronic Materials

Molecular Engineering of Polyphosphazenes and SWNT Hybrids with Potential Applications as Electronic Materials

Effect of Organic Modification on Multiwalled Carbon Nanotube Dispersions in Highly Concentrated Emulsions

Facile Supramolecular Processing of Carbon Nanotubes and Polymers for Electromechanical Sensors

Contact Info

Product

Resources

About