Artificial microstructures composed of chiral building blocks are of great significance in the fields of optics and mechanics. Here, it is shown that highly ordered chiral structures can be spontaneously assembled by a meniscus-directed capillary force arising in an evaporating liquid. The chirality is facilitated by rationally breaking the intrinsic symmetry in the unit cells through cooperative control of the geometry and spatial topology of the micropillars. The interfacial dynamics of the assembly process are studied to show that the sequential self-organization of the micropillars is influenced by the geometries, stiffness, and spatial arrangements. A diversity of chiral assemblies with controlled handedness is yielded by varying the pillar number, height, cross-section, laser power, and spatial topology. Lastly, the differential reflectance of light carrying opposite orbital angular momentums on the assembled chiral architectures are investigated, showcasing their potential in the field of chiral photonics concerning enantioselective response and exceptional optical functions.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/adma.202002356 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Conformational Selectivity and Chiral Self-Assembly Structures of Crown Ethers on Metal Surfaces.
ACS Nano
January 2025
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, P. R. China.
Crown ethers (CEs), macrocyclic polyethers, have attracted significant attention in supramolecular chemistry. It is known that they have many isomers due to their flexibility. It is challenging to select some exact conformation and tune the following self-assembly structure of CEs, and it has rarely been reported to date.
View Article and Find Full Text PDFAn aperiodic chiral tiling by topological molecular self-assembly.
Nat Commun
January 2025
Empa, Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland.
Studying the self-assembly of chiral molecules in two dimensions offers insights into the fundamentals of crystallization. Using scanning tunneling microscopy, we examine an uncommon aggregation of polyaromatic chiral molecules on a silver surface. Dense packing is achieved through a chiral triangular tiling of triads, with N and N ± 1 molecules at the edges.
View Article and Find Full Text PDFChiral Membrane Containing Subnanometer Channels for Enantioselective Transport Amino Acids.
Anal Chem
January 2025
State Key Laboratory of Green Pesticide (CCNU), College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China.
The research of chiral separation technology is of great significance for understanding the origin of life and promoting the application of chiral molecules. Herein, anionic chiral pillar[6]arene and cationic pillar[6]arene were designed and synthesized, and a chiral pillar[6]arene membrane was constructed by layer-by-layer assembly through electrostatic interactions. The transport rates of l and d in this channel were 14.
View Article and Find Full Text PDFHierarchical chirality observed from chiral supramolecular assembling of racemic and enantiopure helicene derivatives on silica nanohelix surfaces.
Nanoscale
January 2025
CBMN, CNRS, UMR 5248, University of Bordeaux, 33600 Pessac, France.
Cast films of racemic helicene derivatives adsorbed onto the surface of nanometric silica helices with controlled handedness exhibited distinct CD signals, whereas no CD signal was observed in the absence of silica nanohelices. These CD signals originate from the helical supramolecular assemblies formed by the racemic mixture of helicenes, with no evidence of enantiospecific adsorption. Interestingly, when enantiomerically pure forms of these helicenes were drop-cast onto the silica helices, different CD spectra were observed depending on the combination of the helicenes' handedness with that of the silica nanohelices.
View Article and Find Full Text PDF2,3:6,7‒Naphthalenediimide-based Chiral Triangular Macrocycle: Self-Assembled Helix, Outer π-surface Directed Co-assembly and Circularly Polarized Luminescence.
Angew Chem Int Ed Engl
January 2025
Institute of Chemistry, CAS, Laboratory of Colloid and Interface Scie, Zhong Guancun, 100080, Beijing, CHINA.
Here, we report the synthesis and self-assembly of a novel chiral 2,3:6,7‒naphthalenediimide-based triangular macrocycle (NDI-∆) and their chiroptical properties. The enantiomeric NDI-∆ is synthesized by condensation of (RR) or (SS)-trans-1,2-cyclohexanediamine and 2,3,6,7-naphthalenetetracarboxylic 2,3:6,7-dianhydride, in which the chirality of the macrocycles is controlled by the diamine. With the rigid outer π-surface, the macrocycle showed unique chiroptical properties and self-assembly modes.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!