Frontiers in circularly polarized luminescence: molecular design, self-assembly, nanomaterials, and applications

Science China Chemistry, Journal Year: 2021, Volume and Issue: 64(12), P. 2060 - 2104

Published: Nov. 10, 2021

Language: Английский

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Recent Advances in Heterocyclic Nanographenes and Other Polycyclic Heteroaromatic Compounds

Chemical Reviews, Journal Year: 2021, Volume and Issue: 122(1), P. 565 - 788

Published: Dec. 1, 2021

This review surveys recent progress in the chemistry of polycyclic heteroaromatic molecules with a focus on structural diversity and synthetic methodology. The article covers literature published during period 2016-2020, providing an update to our first this topic (

Language: Английский

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Designs and Applications of Circularly Polarized Thermally Activated Delayed Fluorescence Molecules

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 31(20)

Published: March 3, 2021

Abstract The design of fluorophores merging circularly polarized luminescence and thermally activated delayed fluorescence properties has recently emerged as a promising direction for the development efficient CP‐Organic Light‐Emitting Diodes (CP‐OLEDs). This progress report gives an overview molecular designs explored to obtain CP‐TADF properties, their performances chiral emitters in CP‐OLEDs, discusses future challenges this burgeoning field research.

Language: Английский

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Pathways to increase the dissymmetry in the interaction of chiral light and chiral molecules

Chemical Science, Journal Year: 2021, Volume and Issue: 12(25), P. 8589 - 8602

Published: Jan. 1, 2021

This perspective explores the dissymmetric interaction between circularly polarised (CP) light and chiral molecules. Such interactions are central to many applications from next generation displays asymmetric photochemical synthesis.

Language: Английский

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Amplification of Dissymmetry Factors in π-Extended [7]- and [9]Helicenes

Journal of the American Chemical Society, Journal Year: 2021, Volume and Issue: 143(12), P. 4661 - 4667

Published: March 18, 2021

π-Extended helicenes constitute an important class of polycyclic aromatic hydrocarbons with intrinsic chirality. Herein, we report the syntheses π-extended [7]helicene 4 and [9]helicene 6 through regioselective cyclodehydrogenation in high yields, where a "prefusion" strategy plays key role preventing undesirable aryl rearrangements. The unique helical structures are unambiguously confirmed by X-ray crystal structure analysis. Compared to parent pristine [9]helicene, these novel display significantly improved photophysical properties, quantum yield 0.41 for 6. After optical resolution chiral high-performance liquid chromatography, chiroptical properties enantiomers 4-P/M 6-P/M investigated, revealing that small variation length from [7] [9] can cause approximately 10-fold increase dissymmetry factors. circularly polarized luminescence brightness reaches 12.6 M–1 cm–1 as one highest among carbohelicenes.

Language: Английский

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500‐Fold Amplification of Small Molecule Circularly Polarised Luminescence through Circularly Polarised FRET

Angewandte Chemie International Edition, Journal Year: 2020, Volume and Issue: 60(1), P. 222 - 227

Published: Oct. 8, 2020

Strongly dissymmetric circularly polarised (CP) luminescence from small organic molecules could transform a range of technologies, such as display devices. However, highly emission is usually not possible with molecules, which typically give factors photoluminescence (gPL ) less than 10-2 . Here we describe an almost 103 -fold chiroptical amplification π-extended superhelicene when embedded in achiral conjugated polymer matrix. This combination increases the |gPL | approximately 3×10-4 solution to 0.15 blend film solid-state. We propose that arises simply through chiral environment effect, but instead due electrodynamic coupling between electric and magnetic transition dipoles donor acceptor, subsequent CP Förster resonance energy transfer. show this effect holds across several hosts thus represents simple versatile approach enhance g-factors molecules.

Language: Английский

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Circularly Polarized Fluorescence Resonance Energy Transfer (C‐FRET) for Efficient Chirality Transmission within an Intermolecular System

Angewandte Chemie International Edition, Journal Year: 2021, Volume and Issue: 60(46), P. 24549 - 24557

Published: Aug. 23, 2021

Abstract The occurrence and transmission of chirality is a fascinating characteristic nature. However, the intermolecular efficiency circularly polarized luminescence (CPL) remains challenging due to poor through‐space energy transfer. We report unique CPL from inducing achiral acceptor emit within specific liquid crystal (LC)‐based system through fluorescence resonance transfer ( C ‐FRET), wherein luminescent cholesteric LC employed as donor, rationally designed long‐wavelength aggregation‐induced emission (AIE) fluorophore acts well‐assembled acceptor. In contrast photon‐release‐and‐absorption, channel ‐FRET highly dependent upon in intrinsic chiral assembly LC, verified by deliberately separating donor keep it far beyond distance. This mode provides de novo strategy concept for high‐level information processing applications such high‐density data storage, combinatorial logic calculation, multilevel encryption decryption.

Language: Английский

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Liquid Crystal Assembly for Ultra-dissymmetric Circularly Polarized Luminescence and Beyond

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(24), P. 12951 - 12966

Published: June 5, 2023

Circularly polarized luminescence (CPL) is attracting much interest because it can carry extensive optical information. CPL shows left- or right-handedness and be regarded as part of high-level visual perception to supply an extra dimension information with regard regular light. A key meeting the needs for practical applications develop emerging field ultra-dissymmetric CPL. Chiral liquid crystal (LC) assemblies─otherwise referred cholesteric crystals (CLCs)─are essentially organized helical superstructures a highly ordered one-dimensional orientation, distinctly superior supramolecules. CLCs achieve perfect equilibrium molecular short-range interaction long-range orientational order, enabling molecule-scale chirality on pitch observable scale. LC assembly could ideal strategy amplifying chirality, making accessible Herein, we focused some basic but important issues regarding CPL: (i) How created from chiral dyes? (ii) Is luminescent dyes essential factor generation CPL? That is, all emit vice versa? (iii) transferred within intermolecular systems, what principles transmission should followed? Given these queries our work, in this Perspective discuss generation, transmission, modulation assembly, aiming design build up novel chiroptical materials. Recent CPL-active microstructures three-dimensional displays, circularly lasers, asymmetric catalysis are also discussed.

Language: Английский

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Mutual Monomer Orientation To Bias the Supramolecular Polymerization of [6]Helicenes and the Resulting Circularly Polarized Light and Spin Filtering Properties

Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(17), P. 7709 - 7719

Published: April 11, 2022

We report on the synthesis and self-assembly of 2,15- 4,13-disubstituted carbo[6]helicenes 1 2 bearing 3,4,5-tridodecyloxybenzamide groups. The these [6]helicenes is strongly influenced by substitution pattern in helicene core that affects mutual orientation monomeric units aggregated form. Thus, 2,15-substituted derivative undergoes an isodesmic supramolecular polymerization forming globular nanoparticles maintain circularly polarized light (CPL) with glum values as high × 10-2. Unlike carbo[6]helicene 1, 4,13-substituted follows a cooperative mechanism generating helical one-dimensional fibers. As result this organization, [6]helicene exhibits unique modification its ECD spectral showing sign inversion at low energy, accompanied change CPL 1.2 10-3, thus unveiling example upon polymerization. These structures chiroptical activity, when deposited conductive surfaces, revealed highly efficient electron-spin filtering abilities, electron spin polarizations up to 80% for 60% 2, measured magnetic conducting atomic force microscopy.

Language: Английский

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Double helical π-aggregate nanoarchitectonics for amplified circularly polarized luminescence

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: March 31, 2022

The canonical double helical π-stacked array of base pairs within DNA interior has inspired the interest in supramolecular architectures with advanced electronic, magnetic and optical functions. Here, we report a selective-recognized chirality-matched co-assembly strategy for fabrication fluorescent π-amino acids into π-aggregates, which show exceptional strong circularly polarized luminescence (CPL). single crystal structure optimal combination co-assemblies shows that double-stranded organization these is cooperatively assisted by both CH-π hydrogen-bond arrays chirality match. well-defined spatial arrangement π-chromophores could effectively suppress non-radiative decay pathways facilitate chiral exciton couplings, leading to superior CPL figure merit (g

Language: Английский

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