We have designed and synthesized a series of FF peptide mimetic with conformationally rigid and flexible spacers to study the effect of spacers on their structure and self-assembly. The results...
Functional bioinspired material have been developed by molecular self-assembly of a hydrophobic peptide. Two analogues peptides containing hydrophobic L-alanine, α-aminoisobutyric acid (Aib), L-phenylalanine and L-tyrosine deliver different supramolecular structure and...
Tryptophan-mediated photo cleavage of disulfide bonds and resulting defibrillation process has been demonstrated. A supramolecular fiber-like network structure arises due to the self-assembly of dibenzyloxycarbonyl-L-cystine by non-covalent interactions such as...
The development of α,ε-hybrid peptide-stabilized
magnetic
nanoparticles and their application to fabricate a paper-based actuator
has been reported. From single-crystal diffraction analysis, the nitropeptide 2 has an extended structure with a trans geometry.
The one-pot in situ multiple oxidation–reduction reaction of
a synthetic nitropeptide solution in ammonium hydroxide and FeCl2 leads to the formation of Fe3O4 nanoparticles.
The reduction reaction replaces the nitro group with an amine group,
which finally acts as capping agent for the stabilization of the Fe3O4 nanoparticles. Paper-based soft magneto machines
with multivariant actuation modes such as contraction–expansion,
bending, and uplifting locomotion have been studied. The device has
potential as controllable paper-based soft robots.
This paper reports a stimuli-responsive designer supramolecular polymer gel in dimethylsulphoxide (DMSO)/water (1:2) based on a dipeptide amphiphile and β-cyclodextrin (β-CD) The dipeptide amphiphile contains caproic acid at the N terminus and methyl ester at the C terminus. From X-ray single crystal diffraction, the amphiphile adopts a kink-like conformation. The amphiphile self-assembled to form a parallel sheet-like structure stabilized by multiple intermolecular hydrogen bonds. Moreover, the parallel sheet-like structure is also stabilized by edge-to-edge π–π stacking interactions. In higher-order packing, it forms a corrugated sheet-like structure stabilized by hydrophobic interactions. The dipeptide amphiphile interacts with β-cyclodextrin and forms gel through supramolecular polymer formation in (DMSO)/water (1:2) by a simple heating-cooling cycle. The sol-to-gel transformation is because of a host–guest complex between compound 1 and β-CD and the formation of supramolecular polymer accompanied by microstructure changes from nanofibers to microrods. The gel is temperature responsive with a Tgel of 70 °C. The supramolecular polymer gel is also responsive to stimuli such aspicric acid and HCl. The extensive spectroscopic studies show that the aromatic hydrophobic side chain of compound 1 forms a host–guest complex with β-CD. These results will be helpful for the design of advanced programable eco-friendly functional materials.
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