Self‐Assembled Diamide Nanotubes in Organic Solvents

Díaz, Nancy; Simon, François‐Xavier; Schmutz, Marc; Rawiso, M.; Decher, Gero; Jestin, Jacques; Mésini, Philippe J.

doi:10.1002/anie.200500536

Cited by 75 publications

(35 citation statements)

References 39 publications

(16 reference statements)

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“…In contrast, the SANS profiles of Ac‐KI 3 NleK‐NH 2 , Ac‐KI 3 LK‐NH 2 , Ac‐KI 3 VK‐NH 2 , Ac‐KI 2 V 2 K‐NH 2 , and Ac‐KIV 3 K‐NH 2 exhibited oscillations at the intermediate q range (Figure ). Such well‐defined oscillations generally signify the formation of hollow nanostructures with a narrow size distribution . In particular, Ac‐KI 3 VK‐NH 2 showed a series of well‐defined oscillations that became more damped with increasing q , and furthermore, its first oscillation was located at a much lower q value of 0.02 Å −1 than those from the other peptides.…”

Section: Resultsmentioning

confidence: 94%

“…For a dilute system of scattering entities where the positional correlation between different entities is negligible (i.e., dilute dispersions), the neutron scattering intensity, I ( q ), can be described by

I (q) = N_{normalP} V_{normalP}^{2} {(normalΔ ρ)}^{2} P (q) + I_{normalb}

where N P and V P denote the number density and the volume of scattering entities, respectively (such that N P V P = ϕ, the volume fraction), Δρ is the difference in scattering length densities (analogous to optical refractive indices) between the scattering entities and the solvent, P ( q ), the form factor, describes the size and shape of scattering entities, and I b is the background intensity. [9a,b,12] The scattering vector q is determined by the incident neutron wavelength λ and the scattering angle θ such that

q = \frac{4 π}{λ} \sin (\frac{θ}{2})

and is related to a real‐space length scale, d , through Bragg's law as

d = \frac{2 π}{q}

…”

Section: Resultsmentioning

confidence: 99%

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Controlling the Diameters of Nanotubes Self‐Assembled from Designed Peptide Bolaphiles

Zhao

Yang

Wang

et al. 2018

Small

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Controlling the diameters of nanotubes represents a major challenge in nanostructures self‐assembled from templating molecules. Here, two series of bolaform hexapeptides are designed, with Set I consisting of Ac‐KI4K‐NH2, Ac‐KI3NleK‐NH2, Ac‐KI3LK‐NH2 and Ac‐KI3TleK‐NH2, and Set II consisting of Ac‐KI3VK‐NH2, Ac‐KI2V2K‐NH2, Ac‐KIV3K‐NH2 and Ac‐KV4K‐NH2. In Set I, substitution for Ile in the C‐terminal alters its side‐chain branching, but the hydrophobicity is retained. In Set II, the substitution of Val for Ile leads to the decrease of hydrophobicity, but the side‐chain β‐branching is retained. The peptide bolaphiles tend to form long nanotubes, with the tube shell being composed of a peptide monolayer. Variation in core side‐chain branching and hydrophobicity causes a steady shift of peptide nanotube diameters from more than one hundred to several nanometers, thereby achieving a reliable control over the underlying molecular self‐assembling processes. Given the structural and functional roles of peptide tubes with varying dimensions in nature and in technological applications, this study exemplifies the predictive templating of nanostructures from short peptide self‐assembly.

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Section: Resultsmentioning

confidence: 94%

I (q) = N_{normalP} V_{normalP}^{2} {(normalΔ ρ)}^{2} P (q) + I_{normalb}

q = \frac{4 π}{λ} \sin (\frac{θ}{2})

and is related to a real‐space length scale, d , through Bragg's law as

d = \frac{2 π}{q}

…”

Section: Resultsmentioning

confidence: 99%

Controlling the Diameters of Nanotubes Self‐Assembled from Designed Peptide Bolaphiles

Zhao

Yang

Wang

et al. 2018

Small

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“…Recently, Mésini and coworkers have synthesised molecules (bhpb-10 see Figure 1) capable of forming nanotubes with very narrow inner and outer radii distributions [24] (Figure 8a). The occurrence of these nanotubes is clearly demonstrated by small-angle scattering experiments (Figure 8b).…”

Section: Sheathing Polymer Fibrils With Self-assembled Systemsmentioning

confidence: 99%

Hybrid Physical Gels from Polymers and Self-Assembled Systems: A Novel Path for Making Functional Materials

Guenet

2018

Gels

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In recent years, the synthesis of novel organic molecules that spontaneously self-assemble into a large variety of molecular architecture, particularly the formation of organogels, has yielded new opportunities in the preparation of functional materials. Here, we present an original preparation path of such materials through the fabrication of hybrid gels of these molecules with covalent polymers. Three types of systems are described: (i) intermingled gels where a polymer gel and an organogel pervade one another; (ii) encapsulation of self-assembled filaments in polymer fibrils, which provides a system with unusual magnetic properties; (iii) the reverse situation in which self-assembled nanotubes sheathe polymer fibrils. Two covalent polymers are considered: a neutral polymer, specifically stereoregular polystyrene (isotactic or syndiotactic), and a semi-conducting polymer, P3BT. In the latter case, semi-conducting nanowires are obtained.

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“…The self‐assembly of well‐defined nanoscale architectures, especially tubular structures, by small organic molecules is of great current interest and a challenging topic in the areas of chemistry and material sciences 1–6. In comparison with other nanostructures, such as ribbons and fibrils, the self‐assembly of high‐aspect nanotubes is considered most challenging as strict conditions are required and only a few examples have been reported 7–12. In previous work, we have reported the hierarchically supramolecular self‐assembly of a small organic nonamphiphilic coil‐rod‐coil molecule p ‐terphenylen‐1,4′′‐ylenebis(dodecanamide) ( TB ) to form a new kind of rolled‐up organic nanotube from its nanosheets precursor 13.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Supramolecular Self‐Assembly of Coil‐Rod‐Coil Molecules: The Relationship between Self‐Assembled Nanostructures and Molecular Structures

Chen

Zhang

Zhu

et al. 2010

Chemistry An Asian Journal

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Herein, the relationship between the supramolecularly self-assembled nanostructures and the chemical structures of coil-rod-coil molecules is discussed. A series of nonamphiphilic coil-rod-coil molecules with different alkyl chains, central mesogenic groups, and chemical linkers were designed and synthesized. The solvent-mediated supramolecular self-assembling of these coil-rod-coil molecules resulted in rolled-up nanotubes, nanofibers, submicron sized belts, needle-like microcrystals, and amorphous structures. The self-assembling behaviors of these coil-rod-coil molecules have been systematically investigated to reveal the relationship between the supramolecularly self-assembled nanostructures and their chemical structures. With respect to the formation of rolled-up nanotubes by self-assembly of coil-rod-coil molecules, we have systematically investigated the following three influencing structural factors: 1) the alkyl chain length; 2) the central mesogenic group; (3) the linker type. These studies disclosed the key structural features of coil-rod-coil molecules for the formation of rolled-up nanotubes.

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Self‐Assembled Diamide Nanotubes in Organic Solvents

Cited by 75 publications

References 39 publications

Controlling the Diameters of Nanotubes Self‐Assembled from Designed Peptide Bolaphiles

Controlling the Diameters of Nanotubes Self‐Assembled from Designed Peptide Bolaphiles

Hybrid Physical Gels from Polymers and Self-Assembled Systems: A Novel Path for Making Functional Materials

Synthesis and Supramolecular Self‐Assembly of Coil‐Rod‐Coil Molecules: The Relationship between Self‐Assembled Nanostructures and Molecular Structures

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