Spreading Films of Anthracene-Containing Gelator Molecules at the Air/Water Interface: Nanorod and Circularly Polarized Luminescence

Yang, Chenchen; Chen, Penglei; Meng, Yan; Liu, Minghua

doi:10.1021/acs.langmuir.8b03478

Cited by 11 publications

(17 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For instance, nanorod structured monolayers were fabricated at the air/water interface using an LB technique with the self‐assembly of two enantiomeric gelator molecules containing an anthracene moiety. [ 71 ] During this process, chiral sense was transferred to the assemblies, enabling the LB films to demonstrate both optical activity and CPLU properties, as shown in Figure A. It was also found that the dissymmetric factors of the CPLU in the LB films were enhanced by nearly five times those in gel systems because of the more compact 2D stacking mode of molecules in LB films.…”

Section: Asymmetrical Self‐assembly At the Interfacementioning

confidence: 96%

Section: Asymmetrical Self‐assembly At the Interfacementioning

confidence: 99%

“…(b) CPL spectra of DGAn and LGAn nanorods films (c) AFM images of one-layer LB films ofLGAn deposited onto a freshly cleaved mica surface from the water subphase. Adapted with permission [71]. Copyright 2019, American Chemical Society.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Supramolecular Chirality Transfer toward Chiral Aggregation: Asymmetric Hierarchical Self‐Assembly

2021

View full text Add to dashboard Cite

Self-assembly, as a typical bottom-up strategy for the fabrication of functional materials, has been applied to fabricate chiral materials with subtle chiral nanostructures. The chiral nanostructures exhibit great potential in asymmetric catalysis, chiral sensing, chiral electronics, photonics, and even the realization of several biological functions. According to existing studies, the supramolecular chirality transfer process combined with hierarchical self-assembly plays a vital role in the fabrication of multiscale chiral structures. This progress report focuses on the hierarchical self-assembly of chiral or achiral molecules that aggregate with asymmetric spatial structures such as twisted bands, helices, and superhelices in different environments. Herein, recent studies on the chirality transfer induced self-assembly based on a variety of supramolecular interactions are summarized. In addition, the influence of different environments and the states of systems including solutions, condensed states, gel systems, interfaces on the asymmetric hierarchical self-assembly, and the expression of chirality are explored. Moreover, both the driving forces that facilitate chiral bias and the supramolecular interactions that play an important role in the expression, transfer, and amplification of the chiral sense are correspondingly discussed.

show abstract

Section: Asymmetrical Self‐assembly At the Interfacementioning

confidence: 96%

Section: Asymmetrical Self‐assembly At the Interfacementioning

confidence: 99%

See 1 more Smart Citation

Supramolecular Chirality Transfer toward Chiral Aggregation: Asymmetric Hierarchical Self‐Assembly

2021

View full text Add to dashboard Cite

show abstract

“…Thus, the fabrication of the chiral supramolecular assemblies has been attracting much attention. There are many ways to fabricate a chiral supramolecular, such as self-assembly in solution, supramolecular gelation, and Langmuir–Blodgett (LB) technique. − Owing to the fact that the LB technique can provide a prominent manner to regulate the molecular orientation and assemble in a two-dimensional (2D) mode at the gas/liquid interface. The LB technique is considered one of the available ways to fabricate 2D nanostructures. − In general, classical amphiphiles with hydrophilic headgroups and long hydrophobic chains are most investigated to assemble into uniform monolayer by the LB technique.…”

Section: Introductionmentioning

confidence: 99%

Helicenes at Air/Water Interface: Spreading Film and Metal Ion Induced a Helical Ring Nanostructure

2021

Self Cite

View full text Add to dashboard Cite

Two enantiomeric hydrohelicenes containing a hydroxyl group and a π-conjugated nonplanar structure are assembled at the air/water interface. These molecules are found to form spreading films with well-defined surface pressure–area isotherms. Upon transferring the spreading film onto the mica surface, porous nanostructures are observed. The spreading film can be transferred onto solid substrates by the Langmuir–Schaefer (LS) method and the transferred LS films display optical activity as revealed by the circular dichroism (CD) spectra. The P- and M-hydrohelicene enantiomers showed mirrored CD spectra, suggesting that the chirality of the LS films was controlled by molecular chirality. When these molecules are spread on the aqueous solution containing metal ions such as Ag+, Cu2+, and Zn2+, a clear twisted ring nanostructure, which is similar to the Möbius strip, is observed. It is suggested that the interaction between the hydroxyl groups of helicenes and metal ions induced such a ring nanostructure.

show abstract

“…However, as an interfacial assembly method, the LB or LS technique can be largely extended to various entities beyond amphiphiles. Various nanostructures such as nanotubes, , nanoparticles, , nanowires, , metal–organic frameworks (MOFs), 2D nanosheets, perovskites, and others were spread on the water surface to facilitate an array of nano-objects in a two-dimensional film. − Previously, we have reported the formation of LB films and CPL from an anthracene-appended amphiphilic molecule . An enhancement of the luminescent dissymmetry factor ( g lum ) was observed in the LB films compared to those in gels.…”

Section: Introductionmentioning

confidence: 99%

Circularly Polarized Luminescence of Langmuir–Schaefer Films of Amphiphilic Stilbene Enhanced via Interfacial Reaction with Cyclodextrins

Yang

Zhu

et al. 2020

Langmuir

Self Cite

View full text Add to dashboard Cite

Two enantiomeric amphiphiles containing the stilbene moiety (L-StG and D-StG) were assembled into ordered Langmuir−Schaefer (LS) films through the air/water interface and their circularly polarized luminescence (CPL) was investigated. When the molecules were spread at the air/water interface, a monolayer with nanofiber structures was formed, which could be subsequently transferred onto solid substrates by the LS method. The LS films showed both circular dichroism (CD) and CPL, whose handedness was determined by the molecular chirality of the amphiphiles. When the amphiphilic molecules were spread on the aqueous subphases containing cyclodextrins (including α-CyD, β-CyD, or γ-CyD), similar nanofiber-featured films were formed. However, the CD and CPL showed different changes. When L-StG was spread on the cyclodextrins, both CD and CPL were enhanced. When D-StG was reacted with cyclodextrins, the CD signal decreased while the CPL was enhanced. It was suggested that the chirality cooperation and conflict between the point chirality from the amphiphilic stilbene and the cavity chirality of cyclodextrin led to the phenomenon. However, in any case, the immobilization of the stilbene by the cyclodextrins caused the enhancement of CPL.

show abstract

Spreading Films of Anthracene-Containing Gelator Molecules at the Air/Water Interface: Nanorod and Circularly Polarized Luminescence

Cited by 11 publications

References 53 publications

Supramolecular Chirality Transfer toward Chiral Aggregation: Asymmetric Hierarchical Self‐Assembly

Supramolecular Chirality Transfer toward Chiral Aggregation: Asymmetric Hierarchical Self‐Assembly

Helicenes at Air/Water Interface: Spreading Film and Metal Ion Induced a Helical Ring Nanostructure

Circularly Polarized Luminescence of Langmuir–Schaefer Films of Amphiphilic Stilbene Enhanced via Interfacial Reaction with Cyclodextrins

Contact Info

Product

Resources

About