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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Circularly polarized luminescence from organic micro-/nano-structures

Light Science & Applications, Journal Year: 2021, Volume and Issue: 10(1)

Published: April 11, 2021

Abstract Circularly polarized light exhibits promising applications in future displays and photonic technologies. luminescence (CPL) from chiral luminophores is an ideal approach to directly generating circularly light, which the energy loss induced by filters can be reduced. Among various luminophores, organic micro-/nano-structures have attracted increasing attention owing high quantum efficiency dissymmetry factor. Herein, recent progress of CPL summarized. Firstly, design principles CPL-active are expounded construction micro-/nano-structure introduction chirality. Based on these principles, several typical with activity introduced detail, including self-assembly small molecules, π-conjugated polymers, micro-/nanoscale architectures. Subsequently, we discuss external stimuli that regulate performance, solvents, pH value, metal ions, mechanical force, temperature. We also summarize materials light-emitting diodes, optical information processing, chemical biological sensing. Finally, current challenges prospects this emerging field presented. It expected review will provide a guide for excellent materials.

Language: Английский

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Emerging applications for living crystallization-driven self-assembly

Chemical Science, Journal Year: 2021, Volume and Issue: 12(13), P. 4661 - 4682

Published: Jan. 1, 2021

The use of crystallization as a tool to control the self-assembly polymeric and molecular amphiphiles in solution is attracting growing attention for creation non-spherical nanoparticles more complex, hierarchical assemblies. In particular, seeded growth method termed living crystallization-driven (CDSA) has been established an ambient temperature potentially scalable platform preparation low dispersity samples core-shell fiber-like or platelet micellar nanoparticles. Significantly, this permits predictable size, access branched segmented structures where functionality spatially-defined. Living CDSA operates under kinetic shows many analogies with chain-growth polymerizations organic monomers that afford well-defined covalent polymers controlled length except it covers much longer scale (ca. 20 nm 10 μm). applied rapidly expanding range crystallizable amphiphiles, which includes block copolymers charge-capped homopolymers, form assemblies crystalline cores solvated coronas. methods have also transposed wide variety π-stacking hydrogen-bonding species supramolecular processes "living polymerizations". article we outline main features then survey promising emerging applications resulting fields such nanomedicine, colloid stabilization, catalysis, optoelectronics, information storage, surface functionalization.

Language: Английский

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Alkyne-Palladium(II)-Catalyzed Living Polymerization of Isocyanides: An Exploration of Diverse Structures and Functions

Accounts of Chemical Research, Journal Year: 2021, Volume and Issue: 54(20), P. 3953 - 3967

Published: Oct. 3, 2021

ConspectusInspired by the perfect helical structures and resulting exquisite functions of biomacromolecules, polymers have attracted increasing attention in recent years. Polyisocyanide is well known for its distinctive rodlike structure various applications chiral recognition, enantiomer separation, circularly polarized luminescence, liquid crystallization, other fields. Although methods catalysts isocyanide polymerization been reported, precise synthesis polyisocyanides with controlled molecular weight, low dispersity, high tacticity remains a formidable challenge. Owing to limited strategy, topological has barely realized. This Accounts highlights our endeavors explore novel living isocyanides. Fortunately, we discovered that alkyne-Pd(II) could initiate isocyanides, structures, tacticity, tunable compositions. These are applicable monomers, including alkyl aryl diisocyanobenzene derivatives. Incorporating bidentate phosphine ligands onto complexes formed Pd(II) catalysts, which promoted asymmetric achiral isocyanide, yielding single left- right-handed helices highly optical activities.Using facilely prepared, hybrid block copolymers, bottlebrush polymers, core cross-linked star organic/inorganic nanoparticles. For instance, were easily produced coupling alkyne-Pd(II)-catalyzed radical ring-opening (ROP). Combining metathesis (ROMP) norbornene Pd(II)-catalyzed polymerization, prepared. poly(lactic acid)s termini resulted densely grafted closely packed side chains. Moreover, surface-initiated isocyanides family polyisocyanide-grafted nanoparticles using anchored on surfaces. Surprisingly, polyisocyanide arms performed exceptionally terms recognition resolution. Incorporated organocatalysts such as proline prolinol units pendants optically active polyisocyanides, polymer-based organocatalysts, generated, showed significantly improved stereoselectivity Aldol reaction Michael addition can be recycled.Using catalyst, single-handed bearing naphthalene pyrene probes from monomers. excellent self-sorting properties revealed fluorescence resonance energy transfer (FRET) investigation self-assembled into two-dimensional (2D) smectic nanostructures driven both helicity chain length. poly(phenyl isocyanide) (PPI) semiconducting poly(3-hexylthiophene) (P3HT) induced assembly P3HT-b-PPI copolymers cylindrical micelles dimensions photoluminescence.

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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Brightening up Circularly Polarized Luminescence of Monosubstituted Polyacetylene by Conformation Control: Mechanism, Switching, and Sensing

Angewandte Chemie International Edition, Journal Year: 2021, Volume and Issue: 60(40), P. 21918 - 21926

Published: July 26, 2021

Abstract The first example of luminescent monosubstituted polyacetylenes (mono‐PAs) is presented, based on a contracted cis‐cisoid polyene backbone. It has an excellent circularly polarized luminescence (CPL) performance with high dissymmetric factor (up to the order 10 −1 ). stems from helical PA backbone, which tightly fixed by strong intramolecular hydrogen bonds, thereby reversing energy excited states and enabling emissive dissipation. CPL switches are facilely achieved solvent temperature through reversible conformational transition. By taking advantages fast response sensitivity, thin film mono‐PAs could be used as CPL‐based probe for quantitative detection trifluoroacetic acid wider linear dynamic range than those photoluminescence circular dichroism. This work opens new avenue develop novel smart materials modulating

Language: Английский

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Chiral Helical Polymer/Perovskite Hybrid Nanofibers with Intense Circularly Polarized Luminescence

ACS Nano, Journal Year: 2021, Volume and Issue: 15(4), P. 7463 - 7471

Published: March 16, 2021

Chiral perovskites with circularly polarized luminescence (CPL) performance have attracted tremendous attention. This contribution reports a convenient and universal strategy for constructing chiral helical polymer/perovskite hybrid nanofibers outstanding CPL properties. The are prepared through one-step electrospinning method in which polyacetylenes, perovskite nanocrystals, polyacrylonitrile serve as handed-selective fluorescence filter, fluorescent source, matrix, respectively. Specially, nanocrystals situ formed during the process, avoids tedious process preparing purifying perovskites. all exhibit good long-time stability air, owing to effective protection effect of polymer matrix. More importantly, intense emissions high dissymmetry factor up 10–2 level obtained nanofibers. Furthermore, emission color can be easily tuned by adjusting precursors work provides an efficient technique toward various kinds CPL-active nanomaterials both scientific research future practical applications.

Language: Английский

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Polymer‐Based Circularly Polarized Luminescent Materials

Advanced Optical Materials, Journal Year: 2023, Volume and Issue: 11(6)

Published: Jan. 19, 2023

Abstract Chiral materials capable of generating circularly polarized luminescence (CPL) have gained rapidly growing research interest by virtue their peculiar photophysical characteristics and far‐reaching applications. Amongst various CPL materials, polymer‐based constituted an important class owing to abundant types, ease manufacture, high thermal stability, as well as, tunable properties. The present work reviews the latest advances in constructing which are classified based on interaction modes between chiral luminescent components, that is, covalent interaction, non‐covalent without interactions. newly emerging categories nonconventional fluorescence‐based room temperature phosphorescence, with thermally activated delayed fluorescence properties also presented. Typical applications emitters organic light‐emitting diodes, information security encryption, optical sensors further discussed. Additionally, current challenges future perspectives this field summarized. This review article is expected stimulate more unprecedented achievements derived from thus promoting practical

Language: Английский

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Group 16 conjugated polymers based on furan, thiophene, selenophene, and tellurophene

Chemical Society Reviews, Journal Year: 2022, Volume and Issue: 51(15), P. 6442 - 6474

Published: Jan. 1, 2022

This review systematically summarizes the history and recent progress in synthesis, properties, post-polymerization modifications of chalcogenophene-based homopolymers copolymers.

Language: Английский

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Intense Circularly Polarized Fluorescence and Room-Temperature Phosphorescence in Carbon Dots/Chiral Helical Polymer Composite Films

ACS Nano, Journal Year: 2023, Volume and Issue: 17(7), P. 6912 - 6921

Published: March 31, 2023

Chiral carbon dots (C-dots) with a circularly polarized fluorescence (CPF) property have attracted tremendous attention due to their significant applications in chiral optoelectronics and theranostics. However, constructing room-temperature phosphorescent (CPRTP) C-dots remains great challenge. Herein, strategy is established achieve efficient CPF CPRTP emissions C-dots/chiral helical polymer bilayer composite film. Taking advantage of the filter effect polymer, intense large dissymmetric factors up 1.4 × 10-1 1.2 10-2 are respectively obtained, even though there only simple interface contact between layer layer. More importantly, white-color emission multiple information display encryption further realized based on prepared luminescent films.

Language: Английский

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