Dual‐direction Circularly Polarized Luminescence Materials With On‐demand Handedness and Superior Flexibility

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

Published: Aug. 29, 2024

Abstract This work utilizes the self‐assembled cellulose nanocrystals (CNCs) as host chiral template and fabricates a circularly polarized luminescence (CPL) film. By manipulating photonic bandgap, synthesized film integrates strong CPL signal superior mechanical flexibility. Without losing activity, ultimate strain of 19% has exceeded most CNC‐based luminescent assemblies, which enables them candidates in optical sensor wearable device. Meanwhile, humidity‐stimulus response, with dissymmetry factor ( g lum ) close to 0.51. responsive process is reversible properties can recover upon drying. Next, by pathway, this achieves on‐demand direction control meets considerable intensity reversed signals : ‐0.35), avoiding structure disruption random under external stimuli, opens new insight into regulations. Furthermore, combines situ growth strategy first synthesizes dynamic‐switchable dual‐direction Optics both directions be inverted simultaneously exchanging sequences. Finally, multimodal optics, excellent stability, green manufacturing make welcome advanced anti‐counterfeit areas, features lossless long‐time useful.

Language: Английский

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Reversible Circularly Polarized Luminescence Inversion and Emission Color Switching in Photo-Modulated Supramolecular Polymer for Multi-Modal Information Encryption

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 28, 2024

Constructing circularly polarized luminescence (CPL) materials that exhibit dynamic handedness inversion and emissive color modulation for multimodal information encryption presents both a significant challenge compelling opportunity. Here, we have developed pyridinethiazole acrylonitrile-cholesterol derivative (Z-PTC) exhibits wavelength-dependent photoisomerization photocyclization, enabling in supramolecular assemblies with decent CPL activity. Coordination Ag

Language: Английский

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Top-down approach for easy processing, cost-effective, biodegradable chiral photonic materials with spontaneous circularly polarized room-temperature phosphorescence activity

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160357 - 160357

Published: Feb. 1, 2025

Language: Английский

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Multiple stimuli-responsive circularly polarized luminescent bio-composite films by coassembling cellulose nanocrystals and curcumin

Carbohydrate Polymers, Journal Year: 2025, Volume and Issue: 356, P. 123405 - 123405

Published: Feb. 16, 2025

Language: Английский

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Solvent‐Free Supramolecular Polymerization for Feather‐Like Nanostructured Chiral Fluorescent Polyurethanes with Multimodal Chiroptical Stimuli Responsiveness

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

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Emergent Nonreciprocal Dual Circularly Polarized Luminescence from an Iridescent Cellulose Nanocrystalline Film

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: March 13, 2025

Ubiquitous chirality has attracted increasing attention because of its unique scientific significance. Moreover, circularly polarized (CP) absorption and emission, which are the essential components chiral optics, have received considerable interest from researchers. However, very few studies been conducted on materials with nonreciprocal CP emission that emit light opposite handedness their two surfaces. Here, we present a novel film developed cellulose nanocrystalline (CNC). A sustainable CNC twisted right-handedness to inherent left-handed nematic structure is by rotation-induced dynamic self-assembly strategy; this not only ambidextrously reflects left- right-handed but also clearly exhibits tunable Janus chiroptical activity, i.e., anisotropic Both orientation factor reflected wavelength maximum reflectivity significantly depend rotation rate direction. In particular, for first time shows feature luminescence (CPL) achieved through pH-regulated doping cadmium telluride quantum dots. This rare CPL phenomenon broken reciprocity in highly desired next-generation electronics photonics immense potential.

Language: Английский

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Polymer induced fluorescence enhancement effect on luminescent chiral nematic cellulose nanocrystal based materials

Carbohydrate Polymers, Journal Year: 2025, Volume and Issue: unknown, P. 123627 - 123627

Published: April 1, 2025

Language: Английский

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Optically Ambidextrous Reflection Circularly Polarized Luminescence Film with High Dissymmetry Factor and On‐Demand Handedness

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

Published: Aug. 31, 2024

Abstract The self‐assembled cellulose nanocrystal (CNC) film has a left‐handed layered structure, which makes the reflection of right‐handed circularly polarized (CP) light challenge. Herein, nematic phase layer is designed and inserted into chiral organization, to work as half‐wave retarder make ambidextrous CP reflection. maximum reflectivity exceeds 80%, breaks 50% limitations single‐direction current in all reported CNC‐based films. This “sandwich‐like” structure displays different optical properties on both sides, displayed chromatism inversion circular dichroism signals. dual direction‐dependent phenomena are reserved synthesized luminescence (CPL) film, with dissymmetry factor ( g lum ) −0.4245. However, this luminescent intensity emission not enough advanced systems. designs triple CPL amplification path develops handedness strategy, −1.0551 0.4082. Then, dual‐directional films designed, where optics can be switched on‐demand. Finally, photonic crystal applied anti‐counterfeit superstructure induction.

Language: Английский

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圆偏振发光材料的手性反转

Scientia Sinica Chimica, Journal Year: 2024, Volume and Issue: 54(8), P. 1233 - 1249

Published: May 27, 2024

Circularly polarized luminescent (CPL) materials have attracted widespread attention due to their potential applications in various fields such as 3D display, photoelectric devices, chiral sensors, and asymmetric synthesis.Constructing high-performance CPL with tunable handedness direction is essential for fulfilling the practical application demands diverse domains.This review summarizes research progress on achieving chirality inversion of through stimuli, including light, temperature, solvent, pH ions.It further briefly discusses inversion, well remaining challenges future trends this area.

Language: Английский

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