Small, Journal Year: 2024, Volume and Issue: unknown
Published: Nov. 17, 2024
Circularly polarized luminescence (CPL) plays a crucial role in the fields of optical display and information technology. The pursuit high dissymmetry factors (g
Language: Английский
Advanced Materials, Journal Year: 2023, Volume and Issue: 35(49)
Published: July 28, 2023
Chiral nematic liquid crystals (N*-LCs) can tremendously amplify circularly polarized luminescence (CPL) signals. Doped emissive N*-LCs have been substantially explored. However, their CPL performances still need to be improved, mainly due the unsatisfying helical twisting power (HTP) of commonly used chiral fluorescent dopants. polymers (CFHPs) outstanding optical activity and performance. The present contribution reports first success in constructing by doping CFHP into (5CB, N-LCs). assembly structures effectively signals CFHP. Owing high HTP CFHP, selective reflection band N*-LC adjusted fully cover its emission band. A nearly pure with a dissymmetry factor (glum ) up -1.87 is realized at 9 wt% concentration. Taking advantage mechanism, multi-color CPL-active glum are fabricated via further adding achiral fluorophores. Also noticeably, room-temperature phosphorescence -1.57 achieved. Anti-counterfeiting application demonstrated exploiting multi-mode characteristics created N*-LCs. established strategy for provides platform future exploring
Language: Английский
Citations
78
Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 53(2), P. 793 - 852
Published: Dec. 18, 2023
Synthetic dynamic helical polymers (supramolecular and covalent) foldamers share the helix as a structural motif.
Language: Английский
Citations
52
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(17)
Published: March 8, 2024
Circularly polarized luminescence (CPL) plays a pivotal role in cutting-edge display and information technologies. Currently achieving precise color control dynamic signal regulation CPL still remains challenging due to the elusory relationship between fluorescence chirality. Inspired by natural mechanisms governing formation chiral interaction, we proposed an addition-subtraction principle theory address this issue. Three fluorene-based polymers synthesized Suzuki polycondensation with different electron-deficient monomers exhibit similar structures UV/Vis absorption, but distinct emissions intramolecular charge transfer. Based on this, precise-color CPL-active films are obtained through quantitative supramolecular co-assembly directed addition principle. Particularly, ideal white-emitting film (CIE coordinates: (0.33, 0.33)) is facilely fabricated high quantum yield of 80.8 % dissymmetry factor (g
Language: Английский
Citations
34
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
31
ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(10), P. 13668 - 13677
Published: March 1, 2023
Preparation of chiral materials from achiral helical polymers has aroused great interest among researchers. In this work, small molecules were utilized to accomplish induction toward racemic polyacetylene via intermolecular π-π stacking by which films with strong optical activity fabricated. Furthermore, introducing fluorescent components generated full-color and white circularly polarized luminescence (CPL). A CPL generation mechanism is proposed accordingly, namely light excitation (CP-Ex). emission amplification the dissymmetry factor achieved under synergetic effect CP-Ex chirality transfer. The was further verified double-layered film consisting a layer layer. More noticeably, for films, sense signals can be switched changing direction light. This work opens up new strategies exploring tunable multiple- white-color materials.
Language: Английский
Citations
27
Science China Chemistry, Journal Year: 2024, Volume and Issue: 67(6), P. 1865 - 1880
Published: April 12, 2024
Language: Английский
Citations
9
ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 27, 2025
Language: Английский
Citations
1
Giant, Journal Year: 2023, Volume and Issue: 14, P. 100161 - 100161
Published: April 27, 2023
The synthesis of chiral substances, especially polymers is currently one the hottest issues in field materials and chemistry due to their unique structural characteristics potential applications. However, acquisition by chemical or asymmetric catalysis may often involve expensive reagents tedious routes. types substances nature are undoubtedly limited. Except for design compounds, utilizing external stimulus factors induce chirality achiral a promising approach. Inspired nature, researchers tend rational interaction systems that attempt precisely transfer information from natural species artificial polymers, which has been proven be an excellent method construct macro-molecular/supramolecular polymer systems. In this review, account typical development naturally occurring including dopants, solvents, summarized. Finally, we further briefly introduce future scope, opportunities, challenges developing novel functional polymeric materials.
Language: Английский
Citations
18
Advanced Optical Materials, Journal Year: 2024, Volume and Issue: 12(19)
Published: April 9, 2024
Abstract Photochromic circularly polarized luminescence (CPL) demonstrates broad application prospects in the field of advanced functional materials. However, current photochromic CPL focuses predominantly on single‐band adjustment, and how to achieve dynamically tunable multi‐band is still highly challenging. This work reports success utilizing reversible photochromism for realizing full‐color emission. flexible films are created consisting triple components: spiropyran (SP) working as matter, polyurethane (PU) matrix, chiral helical polyacetylene component. Further introducing blue fluorophore 9‐anthracene carboxylic acid (ACA) film, red emitted respectively through selective absorption/transmission fluorescence energy transfer (CPF‐ET). Doping film with diverse fluorophores provides Adding Zn 2+ further intensifies via forming merocyanine (MC)‐Zn complex. Taking advantage emission, anti‐counterfeiting, secondary encryption resulting materials demonstrated.
Language: Английский
Citations
8
ACS Materials Letters, Journal Year: 2024, Volume and Issue: 6(7), P. 2957 - 2963
Published: June 12, 2024
Enhancing the dissymmetry factor (glum) is crucial for circularly polarized luminescence (CPL) applications. Herein, we present an innovative strategy achieving ultrastrong |glum| of 1.73. This accomplished through synergistic effect coassembly CPL-emitting ternary liquid crystal (T-N*-LC, = 0.47) and selective reflection (λ 590 nm) polymer cholesteric (CLC) within a composite system. Unlike mismatched chirality combination (|glum| 1.42, ΔFL 57%), matched demonstrates CPL signal with 1.73 low 50% when direction T-N*-LC agrees CLC film's chirality. Furthermore, alter matching degree system by applying direct-current (DC) electric field to realize switch. study paves way developing outstanding CPL-active display materials amplification glum.
Language: Английский
Citations
7