Macro-chiral liquid crystal quantum dots enable large asymmetric circularly polarized luminescence DOI Creative Commons
Huanan Yu, Kaige Zhang,

Qiqu Yu

et al.

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: May 23, 2024

Abstract Circularly polarized luminescent (CPL) materials have garnered considerable interest for a variety of advanced optical applications, including three-dimensional (3D) imaging, data encryption, and asymmetric catalysis. However, the development high-performce CPL has been hindered by absence simple synthetic methods chiral emitters that exhibit both high quantum yields dissymmetry factors. In this study, we present an innovative approach synthesis macro-chiral liquid crystal dots (Ch-QDs/LC) their performance enhancement through doping with 4-cyano-4’-pentylbiphenyl (5CB), thus yielding spiral emission generator (SEG). The Ch-QDs/LCs were synthesized surfaces functionalized mesogenic ligand, specifically cholesteryl benzoate, anchored via lipoic acid linker. Under regulation 2S-Zn2+ coordination complexes, LC encapsulation process promotes coordinated ligand substitution, resulting in exceptional yield 56.3%. This is accompanied absorption factor (gabs) luminescence (glum) values ranging from 10-3 to 10-2, surpassing most reported factors at least order magnitude. modular demonstrate ability transfer chirality surrounding medium efficiently manifest characteristics within nematic matrix. Utilizing Ch-QDs/LC as effective emitter achiral 5CB matrices enabled system achieve maximum glum 0.35. resultant SEG device acted direct source, initiating enantioselective photopolymerization and, thus, paving way novel applications chiroptical practical devices.

Language: Английский

Mechanically Tunable Circularly Polarized Luminescence of Liquid Crystal‐Templated Chiral Perovskite Quantum Dots DOI
Xuan Zhang, Lin Li, Yuanhao Chen

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(22)

Published: March 25, 2024

Abstract Endowing perovskite quantum dots (PQDs) with circularly polarized luminescence (CPL) offers great promise for innovative chiroptical applications, but the existing strategies are inefficient in acquiring stimuli‐responsive flexible chiral films large, tunable dissymmetry factor ( g lum ) and long‐term stability. Here, we report a strategy design synthesis of luminescent cholesteric liquid crystal elastomer (Lumin‐CLCE) mechanically CPL, which is enabled by crystal‐templated self‐assembly situ covalent cross‐linking judiciously designed photopolymerizable CsPbX 3 (X=Cl, Br, I) PQD nanomonomers into elastic polymer networks. The resulting Lumin‐CLCE showcase structural color natural light noticeable CPL maximum value up to 1.5 under UV light. manipulation intensity rotation direction achieved controlling self‐assembled helicoidal nanostructure handedness soft helices. A significant breakthrough lies achievement reversible, perovskite‐based switch activated biaxial stretching, enables flexible, dynamic anti‐counterfeiting labels capable decrypting preset information specific polarization states. This work can provide new insights development advanced materials their emerging applications encryption, 3D displays, beyond.

Language: Английский

Citations

33
Helical-caging enables single-emitted large asymmetric full-color circularly polarized luminescence DOI Creative Commons
Yajie Zhou, Yaxin Wang, Yong‐Hui Song

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Jan. 4, 2024

Abstract Colorful circularly polarized luminescence materials are desired for 3D displays, information security and asymmetric synthesis, in which single-emitted ideal owing to self-absorption avoidance, evenly entire-visible-spectrum-covered photon emission facile device fabrication. However, restricted by the synthesis of chiral broad-luminescent emitters, realization application high-performing full-color is its infancy. Here, we disclose a system (spiral generator), composed whole-vis-spectrum emissive quantum dots liquid crystals. The achieves maximum dissymmetry factor 0.8 remains an order 10 −1 visible region tuning photonic bandgap. We then expand it series customized-color luminescence, build devices further demonstrate working scenario photoinduced enantioselective polymerization. This work contributes design efficient chiroptical materials, fabrication synthesis.

Language: Английский

Citations

30
A Dynamic H‐Bonding Network Enables Stimuli‐Responsive Color‐Tunable Chiral Afterglow Polymer for 4D Encryption DOI Open Access

Guangyao Guo,

Huanhuan Li,

Yingmeng Yan

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(47)

Published: Oct. 6, 2024

Abstract The development of stimuli‐responsive and color‐tunable chiral organic afterglow materials has attracted great attention but remains a daunting challenge. Here, simple yet effective strategy through the construction dynamic H‐bonding network is proposed to explore multi‐color by doping self‐designed phosphorescent chromophore into polyvinyl alcohol matrix. A deep blue system with lifetime up 3.35 s, quantum yield 25.0%, luminescent dissymmetry factor 0.05 achieved reversible formation breakdown upon thermal‐heating water‐fumigating. Moreover, can be obtained energy transfer, allowing establishment information displays high‐level 4D encryption. This work not only offers facile platform develop advanced also opens new avenue for developing next‐generation optical technology enhanced functionality responsiveness.

Language: Английский

Citations

11
One-Dimensional Organic–Inorganic Hybrid Double Perovskites with Near-Unity Photoluminescence Quantum Yield and Advanced Multifunctional Applications DOI
Jie Wu,

Fangping Lin,

Shuai Zhang

et al.

Chemistry of Materials, Journal Year: 2024, Volume and Issue: 36(8), P. 3851 - 3860

Published: April 13, 2024

Lead-free halide double perovskites (DPs) have attracted extensive attention due to their excellent optoelectronic properties, but the synthesis of one-dimensional (1D) organic–inorganic hybrid DPs with high photoluminescence quantum yield (PLQY) is still challenging date. Herein, we successfully prepared high-quality 1D (TMA)2NaInCl6 (TMA tetramethylammonium) by two synthetic routes and near-unity PLQY was achieved incorporating Sb3+ ions into (TMA)2NaInCl6, which much higher than that 3D all-inorganic DPs. Temperature-dependent PL spectroscopic characterizations indicated strong electron–phonon coupling existed in excited state doped system. Density functional theory calculations revealed incorporation modulated distribution density states 24-fold enhancing transition probability thereby significantly improved PLQY. Our study presented new physical insights for in-depth understanding photophysical mechanisms should be very important regulating optical performance perovskite materials.

Language: Английский

Citations

10
Molecular Engineering toward Broad Color‐Tunable Emission of Pyrene‐Based Aggregation‐Induced Emission Luminogens DOI
Wei Liu,

Shaoling Li,

Zhixin Xie

et al.

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: 12(19)

Published: March 27, 2024

Abstract A molecular design strategy for the precise regulation of full‐color‐tunable emission organic luminescence materials is not yet systematically established pyrene chemistry. To fabricate color‐tunable and highly‐efficiency pyrene‐based emitters, this article presents novel molecules with donating‐π‐accepting structures, which exhibit bright, relatively narrow‐band FWHM emission, broad from deep blue (439 nm) to orange‐red (599 both in solution solid state. Moreover, compounds 2a , 2d – g typical aggregation‐induced (AIE) characteristics, an enhanced fluorescence quantum yield The experimental results indicated that presence sterically bulky meta ‐substituted biphenyl adopts out‐of‐plane twist conformation, can strengthen rigidity conformation suppress intermolecular π–π stacking aggregated state, resulting prepared AIEgens are applied as fluorescent inks write Chinese characters art a vivid pattern. Thus, only efficient construct AIEgen properties practical applications, but also display powerful combination strong alliance between advanced luminescent materials, traditional culture.

Language: Английский

Citations

8
Frontiers in Chiral Nonspherical Nanocomposites DOI
Pengpeng Li, Jiahao Zhang, Jinsong Ma

et al.

ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 27, 2025

Language: Английский

Citations

1
Mechanically Tunable Circularly Polarized Luminescence of Liquid Crystal‐Templated Chiral Perovskite Quantum Dots DOI
Xuan Zhang, Lin Li, Yuanhao Chen

et al.

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(22)

Published: March 25, 2024

Abstract Endowing perovskite quantum dots (PQDs) with circularly polarized luminescence (CPL) offers great promise for innovative chiroptical applications, but the existing strategies are inefficient in acquiring stimuli‐responsive flexible chiral films large, tunable dissymmetry factor ( g lum ) and long‐term stability. Here, we report a strategy design synthesis of luminescent cholesteric liquid crystal elastomer (Lumin‐CLCE) mechanically CPL, which is enabled by crystal‐templated self‐assembly situ covalent cross‐linking judiciously designed photopolymerizable CsPbX 3 (X=Cl, Br, I) PQD nanomonomers into elastic polymer networks. The resulting Lumin‐CLCE showcase structural color natural light noticeable CPL maximum value up to 1.5 under UV light. manipulation intensity rotation direction achieved controlling self‐assembled helicoidal nanostructure handedness soft helices. A significant breakthrough lies achievement reversible, perovskite‐based switch activated biaxial stretching, enables flexible, dynamic anti‐counterfeiting labels capable decrypting preset information specific polarization states. This work can provide new insights development advanced materials their emerging applications encryption, 3D displays, beyond.

Language: Английский

Citations

7
Circularly Polarized Organic Ultralong Room‐Temperature Phosphorescence: Generation, Enhancement, and Application DOI Open Access

Jiao Liu,

Xinyu Zhou, Xianhui Tang

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 16, 2024

Abstract Circularly polarized luminescent (CPL) materials have garnered tremendous attention owing to their expanded optical properties beyond emission wavelength and intensity. Among these, the emerging circularly organic ultralong room‐temperature phosphorescence (CP‐OURTP) materialsdemonstrating elegant distinct features are of significant importance for extended lifetime, which represent a novel frontier in research with promising scientific technological applications across diverse fields. This review systematically outlines traditional strategies achieve CP‐OURTP including crystals, copolymerization, host–guest doping, combination copolymerization spinning twisting technology, supramolecular polymer assembly. Importantly, recent progress chiral soft materials, such as liquid crystals (LCs) involving lyotropic LCs (cellulose nanocrystals, CNCs) thermotropic (cholesteric LC elastomers), is showcased. Finally, practical summarized, concludes perspectives on current challenges future opportunities materials. aims inspire further innovations fabrication advanced enrich applications.

Language: Английский

Citations

5
Three‐Level Chirality Transfer and Amplification in Liquid Crystal Supramolecular Assembly for Achieving Full‐Color and White Circularly Polarized Luminescence DOI
Xujie Wang,

Xinhui Gao,

Hai Zhong

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 2, 2024

Chiral liquid crystal supramolecular assembly provides an ideal strategy for constructing excellent circularly polarized luminescence (CPL) materials. However, the chirality transfer in chiral crystals normally occurs at two levels from configurational to phase chirality. The more precise and of transmission are fascinating but remain challenging. present work reports first success three-level amplification configurationally point small molecules conformationally helical polymers finally cholesteric composed nonfluorescent (P46) nematic crystals. Noticeably, twisting power P46 is five-fold larger than its monomer. Full-color white CPL with maximum dissymmetry factor up 1.54 photoluminescence quantum yield 63.8% realized utilizing combined selective reflection mechanism. Also significantly, electrically stimuli-responsive switching device as well anti-counterfeiting security, information encryption, logic gate applications developed. This study deepens understanding across different hierarchical levels.

Language: Английский

Citations

4
Efficient Spin‐Light‐Emitting Diodes With Tunable Red to Near‐Infrared Emission at Room Temperature DOI Creative Commons
Jingwen Yao, Yuling Huang, Haifeng Sun

et al.

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 29, 2025

Abstract Spin light‐emitting diodes (spin‐LEDs) are important for spin‐based electronic circuits as they convert the carrier spin information to optical polarization. Recently, chiral‐induced selectivity (CISS) has emerged a new paradigm enable spin‐LED it does not require any magnetic components and operates at room temperature. However, CISS‐enabled with tunable wavelengths ranging from red near‐infrared (NIR) yet be demonstrated. Here, chiral quasi‐2D perovskites developed fabricate efficient spin‐LEDs NIR region by tuning halide composition. The optimized perovskite films exhibit circularly polarized luminescence 675 788 nm, photoluminescence quantum yield (PLQY) exceeding 86% dissymmetry factor ( g lum ) 8.5 × 10 −3 2.6 −2 . More importantly, direct electroluminescence (CPEL) is achieved temperature in spin‐LEDs. This work demonstrated highest external efficiency (EQE) reaching 12.4% (EL) factors EL 3.7 1.48 composition‐dependent CPEL performance further attributed prolonged lifetime revealed ultrafast transient absorption spectroscopy.

Language: Английский

Citations

0