Efficient and High Color‐Purity Red and Deep‐Red Circularly Polarized Luminescence From Carbon Quantum Dots Enabled by Helical Co‐Assembly Strategy DOI

Jinsui Li,

Wendi Qin,

Chenhao Li

et al.

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

Published: June 4, 2025

Abstract Quantum dots (QDs) are emerging as promising emitters for achieving efficient and high color‐purity narrowband circularly polarized luminescence (CPL), which holds great promise 3D flexible stereoscopic displays. However, the currently reported CPL from QD primarily relies on conventional heavy‐metal Cd/Pb‐based QDs, suffer significant toxicity issues thus severely limit their potential widespread applications. In this study, first instance of efficient, derived environmentally friendly carbon QDs (CQDs) is presented. By incorporating red deep‐red CQDs (RCQDs DRCQDs) with nematic liquid crystals E7 chiral dopants R/S5011, it has formed CQDs‐chiral (CQDs‐CLCs) composites through a helical co‐assembly approach. These CQDs‐CLCs exhibit remarkable optical properties, featuring sharp emission peaks ultranarrow full width at half maximum values 22 nm DRCQDs‐CLCs 37 RCQDs‐CLCs, coupled dissymmetry factor (g lum ) reaching 1.26. Furthermore, by modulating photonic bandgap (PBG), can effectively control even reverse signals, particularly g value. innovative materials successfully implemented in multilevel anticounterfeiting designs information encryption

Language: Английский

Solvent‐Free Supramolecular Polymerization for Feather‐Like Nanostructured Chiral Fluorescent Polyurethanes with Multimodal Chiroptical Stimuli Responsiveness DOI Creative Commons
Huimin Duan, Shuli Li, Xinlei Wu

et al.

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

Published: Feb. 28, 2025

Abstract Chiral supramolecular polymers with stimuli‐responsive circularly polarized luminescence (CPL) are highly desirable for smart flexible optoelectronic devices, but remain rarely reported. Here, a simple solvent‐free polymerization preparing chiral polyurethanes is presented by in situ induced self‐assembly strategy, using cellulose nanocrystals (CNCs)‐based isocyanate prepolymers and macromolecular polyols as precursors, achieving precise control over polymer chain assembly spot‐like arrangement. More importantly, further incorporating π‐conjugated luminescent dihydroxynaphthalene molecule, CPL‐active polyurethane films feather‐like nanostructures constructed, which promote the ordered arrangement of CNCs‐based segments due to increased spatial resistance. The π─H bond network between CNCs urethane‐linked benzene rings drives self‐assembly, enabling higher‐level amplification enhanced fluorescence. Interestingly, prepared fluorescent display multimodal chiroptical stimuli responsiveness under various stimuli, such temperature, solvent polarity, pH, light, sensitivity network. This work offers new insights into designing significant potentials.

Language: Английский

Citations

2
Strong Circularly Polarized Electroluminescence Promoted by Using Chiral Co‐Assembled Liquid Crystal Polymers DOI Open Access
Hang Li,

Dong Li,

Chunya Fu

et al.

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

Published: Jan. 10, 2025

Abstract Achieving high circularly polarized electroluminescence (CP‐EL) performance in organic light‐emitting diodes (OLEDs) remains a significant challenge. In this study, chiral nematic liquid crystal polymers (LCPs) are co‐assembled as fluorescent materials by doping 1 wt% binaphthyl‐based R/S ‐D inducers into LCP ( P‐PyP ), displaying blue luminescence (CPL) signals (| g lum | = 0.025, λ em 470 nm, Φ FL 37%) after thermal annealing at 140 °C. Notably, the resulting films can serve emitting layer (EML) non‐doped OLEDs, and exhibit good CP‐EL emissions EL −0.019/+0.015, 484 nm). This work demonstrates pathway for through co‐assembly of LCPs.

Language: Английский

Citations

1
Inversion of Circularly Polarized Luminescence in the Left‐Handed Chitosan‐Templated Co‐assemblies DOI Creative Commons
Yu An, Zhaocun Shen, Fang Zhang

et al.

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

Published: Jan. 31, 2025

Abstract Circularly polarized luminescence (CPL) materials are attractive due to their unique applications in fields such as 3D displays, information encryption, and chiroptical switches. Natural biomolecules‐based CPL gaining plenty of attention chiral diversity sustainability. However, it is still challenging construct with opposite signs from a single natural biomolecule its inherent chirality. Here, assemblies using chitosan oligosaccharide (COS) achiral luminescent dyes successfully prepared. It found that COS can serve template induce the ordered assembly along polymer chain through electrostatic attraction interaction. demonstrated experimentally structural planarity dye molecules crucial for formation co‐assemblies. Interestingly, left‐handed COS‐templated co‐assemblies emit handedness, which controlled by helicity degree This study not only deepens understanding complex biomacromolecules but also provides new insights into design construction materials.

Language: Английский

Citations

0
Magnetic Assembly‐Assisted Photoprogrammable Circularly Polarized Luminescence Patterns in Flexible PDMS Films DOI Open Access

Jialei Li,

Zeyu Feng,

Chutian Zhang

et al.

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

Published: March 5, 2025

Abstract Circularly polarized luminescence (CPL) material has been widely exploited in 3D display, information encryption, etc. However, situ generation and dynamic modulation of CPL signals to achieve programmable patterns remains challenging due elusory interactions between fluorescence the chiral microstructures. A novel strategy is proposed combining controllable magnetic field‐assisted assembly photo‐patterning technique form twisted stacking heterostructure, consisting orientated Ag@Fe 3 O 4 nanowires (NWs) polydimethylsiloxane (PDMS) film embedded with achiral dyes polydiacetylene (PDA) chains. In a designed system, PDA chains after photo‐polymerization can serve as polarizer produce linear fluorescence, while aligned NWs on surface PDMS films act phase retarder, favoring generation. Furthermore, characteristics, including wavelength handedness, be switched by thermo‐chromatic transition PDA, thus, micropatterns tailorable distributions achieved. By employing above two orthogonal channels, system possesses brilliant storage capabilities, multistage encryption. This study proposes for fabrication toward multiple

Language: Английский

Citations

0
Circularly Polarized Electroluminescence from Organic Emitters DOI
Mingjun Ji, Meng Li, Chuan‐Feng Chen

et al.

Published: Jan. 1, 2025

Language: Английский

Citations

0
Insights into the Structure–Chiroptical Property in Families of Chiral Binuclear Lanthanide Clusters with Circularly Polarized Luminescence DOI

Fang-Wen Lv,

Xueting Wang, Cheng Chen

et al.

Crystal Growth & Design, Journal Year: 2025, Volume and Issue: unknown

Published: May 15, 2025

Language: Английский

Citations

0
Homochiral versus Racemic 2D Covalent Organic Frameworks DOI Creative Commons

José del Refugio Monroy,

Tejas Deshpande,

Joël Schlecht

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: May 15, 2025

The synthesis of homochiral two-dimensional covalent organic frameworks (2D COFs) from chiral π-conjugated building blocks is challenging, as units often lead to misaligned stacking interactions. In this work, we introduce helical chirality into 2D COFs using configurationally stable enantiopure and racemic [5]helicenes linkers in the backbone [5]HeliCOFs powders films. Through condensation with 1,3,5-triformylbenzene (TFB) or 1,3,5-triformylphloroglucinol (TFP), our approach enables efficient formation a set [5]HeliCOFs. resulting carbon-based crystalline porous exhibit distinct structural features different properties between counterparts. Propagation leads observation advanced chiroptical far-red visible spectrum, along less compact structure compared frameworks. Homogeneous thin films disclosed photoluminescent arising controlled growth highly ordered lattices. present study offers insight general framework extends Liebisch-Wallach rule COFs.

Language: Английский

Citations

0
Efficient and High Color‐Purity Red and Deep‐Red Circularly Polarized Luminescence From Carbon Quantum Dots Enabled by Helical Co‐Assembly Strategy DOI

Jinsui Li,

Wendi Qin,

Chenhao Li

et al.

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

Published: June 4, 2025

Abstract Quantum dots (QDs) are emerging as promising emitters for achieving efficient and high color‐purity narrowband circularly polarized luminescence (CPL), which holds great promise 3D flexible stereoscopic displays. However, the currently reported CPL from QD primarily relies on conventional heavy‐metal Cd/Pb‐based QDs, suffer significant toxicity issues thus severely limit their potential widespread applications. In this study, first instance of efficient, derived environmentally friendly carbon QDs (CQDs) is presented. By incorporating red deep‐red CQDs (RCQDs DRCQDs) with nematic liquid crystals E7 chiral dopants R/S5011, it has formed CQDs‐chiral (CQDs‐CLCs) composites through a helical co‐assembly approach. These CQDs‐CLCs exhibit remarkable optical properties, featuring sharp emission peaks ultranarrow full width at half maximum values 22 nm DRCQDs‐CLCs 37 RCQDs‐CLCs, coupled dissymmetry factor (g lum ) reaching 1.26. Furthermore, by modulating photonic bandgap (PBG), can effectively control even reverse signals, particularly g value. innovative materials successfully implemented in multilevel anticounterfeiting designs information encryption

Language: Английский

Citations

0