Induced CPL‐Active Materials Based on Chiral Supramolecular Co‐Assemblies

Abstract

Circularly polarized luminescence (CPL) has attracted much interest due to its potential applications on chiral photonic techniques and optoelectronic materials science. As known, dissymmetry factor (g em ) of CPL is one essential factor for evaluating the features of CPL-active materials. Much attention has focused on how to increase the g em value, which is one of the most important issues for CPL practical applications. Recently, more and more works have demonstrated that chiral supramolecular could provide the significant strategy to improve the g em value through the orderly helical superstructure of chiral building blocks. Normally, this kind of chiral supramolecular assembly process can be accompanied by chirality transfer and induction mechanism, which can promote the amplification effect on the induced CPL of achiral dyes. In this review, we fully summarized recent advances on the induced CPL-active materials of chiral supramolecular co-assemblies, their applications in circularly polarized organic light-emitting diodes (CP-OLEDs) and current challenges.

Unraveling the Remarkable Influence of Substituents on the Emission Variation and Circularly Polarized Luminescence of Dinuclear Aluminum Triple-Stranded Helicates

“…For newly synthesized complexes 3 and 5 , we explored the isolation of enantiomers using chiral column chromatography and evaluated their chiroptical properties, including circular dichroism (CD) spectra and circularly polarized luminescence (CPL). There is growing interest in CPL materials for applications such as next-generation security inks and optical functional materials, − and various organic materials − and metal complexes ,− have been reported. In this context, the synthesis and functional evaluation of CPL materials based on aluminum complexes are significant.…”

Luminescent Behavior of Zn(II) and Mn(II) Halide Derivatives of 4-Phenyldinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepine 4-Oxide and Single-Crystal X-ray Structure Determination of the Ligand

“…A recent noticeable example is constituted by the integration of chiral BINOL-phosphoric acid and Cu(II)-porphyrin modules into a single framework, able to promote the asymmetric α-benzylation of aldehydes via visible-light-induced photothermal conversion [ 14 ]. Actual advanced applications of BINOL-based compounds include supramolecular enantiorecognition, which is also based on luminescence measurements, and the development of materials with chiral optical properties [ 15 , 16 , 17 , 18 , 19 , 20 , 21 ]. Recent examples in this field are chiroptical switches constituted by tetrahedral boron BINOL derivatives containing fluorene- or dibenzosuberenone-substituted pyridinylhydrazone moieties that exhibit noticeable chiroptical changes after visible light irradiation [ 22 ].…”

BINOL induces chirality in polyfluorene-based electroluminescent polymers in solid state

“…The case where the electric vector rotates counterclockwise is defined as the left CP light and the case where that rotates clockwise is defined as the right CP light. 4) The CP light attracted much attention from researchers because it can be applied to a variety of fields such as quantum computing, 3D displays, and bio-responsive imaging. [5][6][7][8] A simple method to obtain CP light is to convert isotropic light into linearly polarized (LP) light and then convert the LP light into CP light through a quarter-wave plate.…”