Synthesis and properties of novel nanocomposites made of single-walled carbon nanotubes and low molecular mass organogels and their thermo-responsive behavior triggered by near IR radiation

Pal, Asish; Chhikara, Bhupender S.; Govindaraj, A.; Bhattacharya, Santanu; Rao, C. N. R.

doi:10.1039/b719432c

Cited by 83 publications

(59 citation statements)

References 67 publications

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“…The organization and properties of such gels can be modulated by the incorporation of nanoparticles or -tubes. [24][25][26][27] We have reported different instances of the preparation of new gel-nanotube composites from a nonchromophoric organogelator based on fatty acid amides of l-alanine (2) [25] and also a chromophoric organogelator based on a tri-p-phenylenevinylene (TPV; 1) moiety with single-walled carbon nanotubes (SWNTs) [26] and boron nitride nanotubes (BNNTs). [27] These showed the tunability of the nanocomposites in terms of optical, thermal, and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Composites of Graphene and Other Nanocarbons with Organogelators Assembled through Supramolecular Interactions

Samanta

Subrahmanyam

Bhattacharya

et al. 2012

Chemistry A European J

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Carbon nanomaterials (CNMs), such as exfoliated graphene (EG), long-chain functionalized EG, single-walled carbon nanotubes (SWNTs), and fullerene (C(60)), have been investigated for their interaction with two structurally different gelators based on all-trans tri-p-phenylenevinylene bis-aldoxime (1) and n-lauroyl-L-alanine (2) both in solution and in supramolecular organogels. Gelation occurs in toluene through hydrogen bonding and van der Waals interactions for 1 and 2 in addition to π-π stacking specifically in the case of 1. These nanocomposites provide a thorough understanding in terms of molecular-level interactions of dimensionally different CNMs with structurally different gelators. The presence of densely wrapped CNMs encapsulated fibrous network in the resulting composites is evident from various spectroscopic and microscopic studies, indicating the presence of supramolecular interactions. Concentration- and temperature-dependent UV/Vis and fluorescence spectra show that CNMs promote aggregation of the gelator molecules, leading to hypochromism and quenching of the fluorescence intensity. Thermotropic mesophases of 1 are altered by the inclusion of a small amount of CNMs. The gel-CNM composites show increased electrical conductivity compared with that of the native organogel. Rheological studies of the composites demonstrate the formation of rigid and viscoelastic solidlike assembly due to reinforced aggregation of the gelators on CNMs. Synergistic behavior is observed in case of the composite gel of 1, containing a mixture of EG and SWNT, when compared with other mixtures of CNMs in all combinations with EG. This affords new nanocomposites with interesting optical, thermal, electrical, and mechanical properties.

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Section: Introductionmentioning

confidence: 99%

Composites of Graphene and Other Nanocarbons with Organogelators Assembled through Supramolecular Interactions

Samanta

Subrahmanyam

Bhattacharya

et al. 2012

Chemistry A European J

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“…Especially pyrene-based LMOGs are simple compounds that are extremely effective at gelling many organic solvents and could show unique structural, electrical and mechanical properties on forming nonocomposite with carbon nanotubes (CNT) [178][179][180][181]. Sugar based pyrene derivatives, 63-66 (Figure 11)were obtained by direct aldol condensation of β-C-glycosidic ketones with 1-pyrenecarboxaldehyde.…”

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confidence: 99%

Recent developments in β-C-glycosides: synthesis and applications

Lalitha

Muthusamy

Prasad

et al. 2015

Carbohydrate Research

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“…Covalent functionalization of the SWNTs was performed following the previously reported method [9,18]. Carboxylic groups on the surface of the SWNTs generated by oxidation were first converted to acyl chlorides using thionyl chloride and then reacted with compound 2 to give functionalized SWNTs (f-SWNTs), as illustrated in Scheme 2.…”

Section: Resultsmentioning

confidence: 99%

“…Self-assembled supramolecular systems, such as liquid crystals [13,14], polymeric hydrogels [15], and organogels [16][17][18] have also been investigated for their ability to control the aggregated state and orientation of CNTs. In particular, the dispersion of CNTs in organogels has drawn considerable attention.…”

Section: Introductionmentioning

confidence: 99%

“…SWNTs could also act as a physical cross-linker between the tapes to enhance gel stability. Rao and coworkers prepared organogel-CNT composites, where SWNTs were incorporated into organogels formed by an L-alanine based gelator [18]. SWNTs were functionalized with different aliphatic and aromatic chains to improve their solubility in the gel matrix.…”

Section: Introductionmentioning

confidence: 99%

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Dispersion of single walled carbon nanotubes in organogels by incorporation into organogel fibers

Jung

Lee

et al. 2010

Journal of Colloid and Interface Science

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Synthesis and properties of novel nanocomposites made of single-walled carbon nanotubes and low molecular mass organogels and their thermo-responsive behavior triggered by near IR radiation

Cited by 83 publications

References 67 publications

Composites of Graphene and Other Nanocarbons with Organogelators Assembled through Supramolecular Interactions

Composites of Graphene and Other Nanocarbons with Organogelators Assembled through Supramolecular Interactions

Recent developments in β-C-glycosides: synthesis and applications

Dispersion of single walled carbon nanotubes in organogels by incorporation into organogel fibers

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