High-Efficiency Circularly Polarized Luminescence from Twisted Tetraarylethylene-Bridged Polybissilsesquioxane Nanotubes

Abstract

Circularly polarized luminescence (CPL)-active materials have attracted increasing attention due to their applications in chiral sensing and optoelectronics. However, it is still a challenging task to fabricate CPL materials with large luminescence dissymmetry factors and strong emission intensities in the solid state. In this work, two singlehanded twisted tetraarylethylene (TAE)-bridged polybissilsesquioxane nanotubes have been facilely constructed through a supramolecular templating polymerization of TAE-bridged bis(triethoxysilane) with aggregation-induced emission properties, using self-assemblies of a pair of chiral amino acid-based cationic amphiphiles as the supramolecular templates. It is found that the chirality has been transferred from the self-assemblies to the polybissilsesquioxane nanotubes. The resulting hybrid silicas show high thermal stabilities and bright CPL with the fluorescence quantum yield up to 62.8%.

Brightening up Full-Color and White Circularly Polarized Luminescence through Chiral Induction and Circularly Polarized Light Excitation

“…CPL materials have been widely concerned by researchers due to their huge potential applications in 3D optical display, information storage and encryption, biological probes, and so forth. − Circularly polarized light can be generated from plane polarized light by using polarizers and quarter wave plates, but it will cause large energy loss in the transition process. , Therefore, the development of materials that can directly generate CPL has become a new research hotspot. At present, the methods to construct CPL-active materials mainly focus on small organic molecules, , supramolecular components, − liquid crystals, polymers, ,− and metal–ligand coordination complexes. , CPL materials based on polymers have advanced greatly due to their high stability and good processability . It is well known that chirality and fluorescence are the two necessary conditions for achieving CPL emission .…”

Enhancing the Circularly Polarized Luminescence of Europium Coordination Polymers by Doping a Chromophore Ligand into Superhelices

“…Aggregation of chiral molecules into helical fibers is considered as one of the efficient routes to enhance the anisotropic factor in luminescence. − For example, chiral organic molecules usually show small | g lum | values due to a negligible magnetic dipole moment. Self-assembly of chiral organic molecules into helical aggregates can significantly increase the dissymmetry factor. , However, a drawback of this approach is the aggregation-caused quenching (ACQ), effect which leads to a low quantum yield for the material …”

Adenine selected hydrogelation of vitamin B2 with amplified circularly polarized luminescence

“…[18][19][20][21][22][23] In the process of multi-component assembly, not only the chiral species but also achiral ones could possibly produce a marked effect on the regulation of supramolecular chirality. [24][25][26][27][28][29] Whereas the role of the achiral auxiliary in the functionalization of chiral supramolecular assemblies is scarcely investigated. Here, we demonstrated an example that the achiral adenine could contribute to the expression of the chiral information for the conventional fluorescent vitamin B2 (VB2) molecules, resulting in the generation of circularly polarized luminescence (CPL) in their coassemblies.…”