Science China Chemistry, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 3, 2025
Language: Английский
Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)
Published: March 15, 2024
Abstract There is interest in developing sustainable materials displaying circularly polarized room-temperature phosphorescence, which have been scarcely reported. Here, we introduce biobased thin films exhibiting luminescence with simultaneous phosphorescence. For this purpose, phosphorescence-active lignosulfonate biomolecules are co-assembled cellulose nanocrystals a chiral construct. The shown to capture the chirality generated by within films, emitting phosphorescence 0.21 dissymmetry factor and 103 ms lifetime. By contrast most organic materials, chiral-phosphorescent system possesses stability, no significant recession under extreme chemical environments. Meanwhile, luminescent resist water humid environments but fully biodegradable (16 days) soil conditions. introduced bio-based, environmentally-friendly expected open many opportunities, as demonstrated here for information processing anti-counterfeiting.
Language: Английский
Citations
41
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
35
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(12)
Published: Jan. 24, 2024
Abstract Achieving circularly polarized organic ultralong room‐temperature phosphorescence (CP‐OURTP) with a high luminescent dissymmetry factor (g lum ) is crucial for diverse optoelectronic applications. In particular, dynamically controlling the of CP‐OURTP can profoundly advance these applications, but it still unprecedented. This study introduces an effective strategy to achieve photoirradiation‐driven chirality regulation in bilayered structure film, which consists layer soft helical superstructure incorporated light‐driven molecular motor and phosphorescent (RTP) polymer. The prepared film exhibits emission lifetime 805 ms g value up 1.38. Remarkably, resulting be reversibly controlled between 0.6 1.38 over 20 cycles by light irradiation, representing first example CP‐OURTP.
Language: Английский
Citations
30
Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)
Published: April 9, 2024
Abstract Creating circularly polarized organic afterglow system with elevated triplet energy levels, suppressed non-radiative transitions, and effective chirality, which are three critical prerequisites for achieving blue afterglow, has posed a formidable challenge. Herein, straightforward approach is unveiled to attain materials by covalently self-confining isolated chiral chromophore within polymer matrix. The formation of robust hydrogen bonds the matrix confers distinctly stabilized molecular state chromophores, endowing emission band at 414 nm, lifetime 3.0 s, luminescent dissymmetry factor ~ 10 −2 . Utilizing synergistic chirality transfer, full-color systems endowed doping colorful fluorescent molecules into designed polymers, empowering versatile applications. This work paves way streamlined design materials, expanding horizons various domains.
Language: Английский
Citations
28
Advanced Materials, Journal Year: 2024, Volume and Issue: 36(18)
Published: Jan. 25, 2024
Abstract Integrating optically active components into chiral photonic cellulose to fabricate circularly polarized luminescent materials has transformative potential in disease detection, asymmetric reactions, and anticounterfeiting techniques. However, the lack of cellulose‐based left‐handed light (L‐CPL) emissions hampers progress these functionalizations. Here, this work proposes an unprecedented strategy: incorporating a nematic organization hydroxypropyl with robust aggregation‐induced emission luminogens generate intense L‐CPL emission. By utilizing N , ‐dimethylformamide as good solvent for fluorescent matrices, produces right‐handed structure film uniform appearance reflective states. Remarkably, system integrates high factor (0.51) impressive quantum yield (55.8%) one fascinating composite. More meaningfully, approach is versatile, allowing incorporation luminogen derivatives emitting multicolored L‐CPL. These films possess exceptional mechanical flexibility (toughness up 0.9 MJ m −3 ) structural stability even under harsh environmental exposures, making them promising fabrication various products. Additionally, can be cast on fabrics reveal multilevel durable capabilities or used source induce enantioselective photopolymerization, thereby offering significant diverse practical applications.
Language: Английский
Citations
27
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: July 21, 2024
Abstract Circularly polarized luminescence (CPL) materials offer exciting potential due to their unique light properties. However, controlling the color of afterglow emission, a key feature for many applications remains challenge. Here, co‐doping strategy is presented precise control multicolor CPL in films. This approach utilizes chiral naphthylphosphoric acid derivatives as energy and chirality transfer donors, commonly used fluorescent dye rhodamine B (RB) PVA are selected acceptor polymeric matrix, respectively. Remarkably, co‐doped films exhibit ultra‐long green circular polarization phosphorescence lasting several seconds with high efficiency (14.23%), lifetime (1025.5 ms), dissymmetry factor (8.44 × 10 −3 ). Crucially, by adjusting content, it can precisely tune phosphorescence‐to‐fluorescence ratio achieve afterglow. stems from combination Förster resonance transfer, color‐mixing effects. Furthermore, this significantly improves asymmetry an order magnitude (5.17 −2 It anticipated that straightforward regulating will provide invaluable insights future design highly efficient innovative materials.
Language: Английский
Citations
19
Advanced Optical Materials, Journal Year: 2024, Volume and Issue: 12(15)
Published: Feb. 5, 2024
Abstract Chiral self‐assembly has often been found to be an efficient strategy for the development of high‐performance circularly polarized luminescent (CPL) materials, through regulation ordered helical superstructure blocks in liquid crystal media. Here, design and synthesis two pairs axially chiral emitters (BBXT‐3‐Br BOHXT‐3‐Br) are reported based on bromoxanthone. And self‐assembled polymer (LCP) framework (PRM257) is demonstrated by mixing with monomer (RM257) thermal annealing photoinitiated polymerization. Both BBXT‐3‐Br@PRM257 BOHXT‐3‐Br@PRM257 exhibited excellent room temperature phosphorescence (RTP) properties. In addition, enantiomers showed afterglow average lifetime ( τ ) 162.41 ms emitted blue CPL λ em = 450 nm, Φ FL 1.3%, | g 0.071), although weak RTP (CP‐RTP) observed. Interestingly, a less conjugated system emits red 98.83 ms) also intense CP‐RTP 612 Phos 0.45%, 0.057).
Language: Английский
Citations
15
Small, Journal Year: 2024, Volume and Issue: unknown
Published: June 17, 2024
Abstract Circularly polarized room‐temperature phosphorescence (CPRTP) simultaneously featuring multiple colors and extremely high dissymmetry factor ( g lum ) is crucial for increasing the complexity of optical characteristics advancing further development, but such a type CPRTP still unprecedented. The present work develops an effective universal strategy to achieve full‐color with ultra‐high factors in polymeric cholesteric superhelix network, which constructed by liquid crystal polymer chiral helical (CHP). Taking advantage twisting power CHP, resulting network exhibits remarkable activity. Significantly, adopting simple double‐layered architectures consisting film phosphorescent films, blue‐, green‐, yellow‐, red‐CPRTP emissions are successfully obtained, maximum | values up 1.43, 1.39, 1.09 0.84, respectively. Further, multilevel information encryption application demonstrated based on multidimensional architectures. This study offers new insights into fabricating considerable performance advanced photonic applications.
Language: Английский
Citations
13
Nano Today, Journal Year: 2024, Volume and Issue: 55, P. 102197 - 102197
Published: Feb. 9, 2024
Language: Английский
Citations
9
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
9