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Non‐disk‐shaped molecules self‐assembled to form columnar‐type helical aggregates with gel ability through π‐stacking interactions among the central tris(phenylethynylphenyl)adamantane moieties, hydrogen‐bonding interactions among the alanine parts with amide groups, and van der Waals interactions among the alkyl groups in nonpolar n‐alkanes. The structural analyses of fibrous architectures with helicity...
In this work, we present the characterization of an enantiomeric pair of fluorescent dye organogelators and the properties of their stable gel at low concentration in organic solvents. The gels of both enantiomers and of their mixtures were analyzed by differential scanning calorimetry, circular dichroism (CD), atomic force microscopy, UV–vis absorption, and fluorescence. The acquired data were supported...
Self‐assembly of molecules is one of the fundamental processes in biology and in supramolecular chemistry. Guanosine (Guo) and its derivatives are among the widely studied molecules because of self‐assembly abilities. Their tetrameric associates are the nature of telomeric DNA, and furthermore they are fundamental building blocks of supramolecular reversible gels, which may arise in certain physical...
Patterning of solid surfaces with functional organic molecules has been a convenient route to fabricate two‐dimensional materials with programmed architecture and activities. One example is the chiral nanoporous networks that can be created via controlled self‐assembly of star‐shaped molecules under 2D confinement. In this contribution we use computer modeling to predict the formation of molecular...
Single‐handed twisted titania tubular nanoribbons were prepared through sol‐gel transcription using a pair of enantiomers. Handedness was controlled by that of the template. The obtained samples were characterized using field‐emission electron microscopy, transmission electron microscopy, diffuse reflectance circular dichroism (DRCD), and X‐ray diffraction. The DRCD spectra indicated that the titania...
Single‐handed twisted 4,4′‐biphenylene‐bridged polybissilsesquioxane tubular nanoribbons and single‐layered nanoribbons were prepared by tuning the water/ethanol volume ratio in the reaction mixture at pH = 11.6 through a supramolecular templating approach. The single‐layered nanoribbons were formed by shrinking tubular nanoribbons after the removal of the templates. In addition, solvent‐induced handedness...
Polybissilsesquioxanes with single‐handed helical morphologies attracted much attention during the last decade, which could be applied as asymmetric catalysts and chiral stationary phases. Herein, a pair of chiral biphenylene‐bridged bissilsesquioxanes were synthesized. They self‐assembled into helical bundles in ethanol, behavior that was confirmed in field emission scanning electron microscopy images...
The use of stereodynamic probes is becoming one of the leading strategies for the fast and effective determination of enantiomeric excess. Recently, we reported a series of novel molecular architectures based on a modified tris(2‐pyridylmethyl)amine complex (TPMA), which are able to amplify the electronic CD, in the case of Zn(II) assemblies and vibrational CD, in the case of Co(II) assemblies. Herein,...
Although the preparation of single‐handed helical inorganic and hybrid organic‐inorganic nanotubes is well developed, approaches to the formation of single‐handed organopolymeric nanotubes are limited. Here, left‐handed helical m‐phenylenediamine‐formaldehyde resin and 3‐aminophenol‐formaldehyde resin nanotubes were prepared by using N‐palmitoyl glucosamine that can self‐assemble into left‐handed...
Circular dichroism (CD) spectroscopy has been used extensively for the investigation of the conformation and configuration of chiral molecules, but its use for evaluating the mode of self‐assembly in soft materials has been limited. Herein, we report a protocol for the study of such materials by electronic CD spectroscopy using commercial/benchtop instruments and synchrotron radiation (SR) using the...
We report the hierarchical supramolecular organization of metallosupramolecular homochiral complexes 1‐Λ‐(S,S,S,S)‐M2+/1‐∆‐(R,R,R,R)‐M2+ and 2‐ Λ‐(S,S,S,S)‐M2+/2‐∆‐ (R,R,R,R)‐M2+ of M2+ = Co2+, Fe2+, Zn2+ metal ions with chiral pseudo‐terpyridine‐type ligands: 1‐(S,S) or 1‐(R,R) = 2,6‐bis (naphthyl ethylimine)pyridine and 2‐(S,S) or 2‐(R,R) = 2,6‐bis (phenyl‐ethylimine)pyridine. Circular dichroism...
In this study, we performed an ultraviolet‐visible (UV‐Vis) and circular dichroism (CD) spectroscopic analysis of the binary and ternary supramolecular structures formed by self‐assembling the following three water‐soluble porphyrins with and without a chiral template: the negatively charged, meso‐Tetra(4‐sulfonatophenyl) porphine (H2TPPS4−); the positively charged meso‐trans‐(di(N‐methyl‐4‐pyridyl)diphenyl)...
Chiroptical materials have received much attention in diverse fields for applications such as displays, sensors, smart memory devices, and catalysis. Here, we develop a simple fabrication method for polymer films with tunable chiroptical properties using small amounts of self‐assembling fluorescent dye as an additive. Both the circular dichroism and circularly polarized luminescence signals of the...
A 1:1 mixture of pseudoenantiomer ethynylhelicene (P)‐pentamer and (M)‐tetramer in toluene formed hetero‐double‐helix and their self‐assembled gels. Kinetic analysis under isothermal conditions showed a complex nonlinear nature with regard to temperature changes. At 60°C, sigmoidal kinetics were observed, which disappeared after seeding with the self‐assembled gels. These findings indicate the involvement...
The assembling behaviors of nonchiral dicationic amphiphilic molecules (gemini) in the presence of the mixture of chiral anionic nucleotides and nonchiral anions are investigated. We demonstrate that subtle balance of various physico‐chemical parameters and the competition between chiral and nonchiral anions at the interface of gemini assemblies influences the expression of molecular chirality at...
Due to the crucial role of amino acids in life sciences and pharmaceutics, identification of optical amino acid molecules is of great significance. In this study, the two materials (CNT and PANI) were combined together to obtain the magnification of electrochemical signal by substrate material (CNT/PANI). Then a self‐assembled multiwalled carbon nanotubes/polyaniline/sodium alginate (CNT/PANI/SA)...
Helical polymers present some interesting and distinctive properties, and one of the most distinguished applications of them is the chiral recognition and resolution of enantiomers. In this work, star‐shaped hybrid helical poly (phenyl isocyanide) (PPI) with polyhedral oligomeric silsesquioxanes (POSS) as the core was designed and synthesized by “grafting to” strategy. The homoarm star‐shaped hybrid...
Herein, the synthesis of two chiral NPBIs, (S)‐1 and (R)‐1, is reported and their self‐assembling features investigated. The reported NPBIs form chiral supramolecular polymers with a rich dichroic pattern by the π‐stacking of the aromatic backbones and the formation of an array of H‐bonds between the amide functional groups. Furthermore, the peripheral 3,4,5‐trialkoxy benzamide groups can form seven‐membered...
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