Circularly polarized luminescence in chiral nematic liquid crystals based on photochromic molecules DOI Open Access
Dongxue Han, Guang Chen, Liang Peng

et al.

Chemical Synthesis, Journal Year: 2024, Volume and Issue: 4(4)

Published: Nov. 19, 2024

Circularly polarized luminescence (CPL) has emerged as a focal point in luminescent materials research, reflecting growing field of study. Responding to the demand for practical applications across diverse sectors, there is critical need CPL with high dissymmetry factors (g lum) and adjustable optical performance, driving development novel methodological approaches. Chiral nematic liquid crystals (N*-LCs) have attracted significant attention promising candidates producing high-performance due their ability exhibit enhanced g lum modulate circularly light. This review comprehensively presents stimuli-responsive properties, utilizing N*-LCs chiral templates doped various photochromic compounds, particularly azobenzene, spiropyran (SP), diarylethene overcrowded alkene. By elucidating dynamic interplay between molecular structure, supramolecular organization, response, it offers profound understanding behaviors. Additionally, also explores multifaceted materials, spanning advanced display technologies, data storage, beyond. examining avenues leveraging unique highlights pivotal role innovation photonic applications, facilitating transformative advancements field.

Language: Английский

Polymeric Cholesteric Superhelix Induced by Chiral Helical Polymer for Achieving Full‐Color Circularly Polarized Room‐Temperature Phosphorescence with Ultra‐High Dissymmetry Factor DOI
Xujie Wang, Kai Yang, Biao Zhao

et al.

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

12
Ultrastrong Circularly Polarized Luminescence Triggered by the Synergistic Effect of Chiral Coassembly and Selective Reflective Cholesteric Liquid Crystal Film DOI
Jiaxin Luo, Yang Li, Hang Li

et al.

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

Kuo Fu,

Da‐Hui Qu, Guofeng Liu

et al.

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

Citations

4
Dual Circularly Polarized Luminescence with Controllable Polarizations in a Single Cholesteric Liquid Crystal DOI
Yang Li, Jiaxin Luo, Xueyan Zhang

et al.

ACS Materials Letters, Journal Year: 2025, Volume and Issue: unknown, P. 654 - 659

Published: Jan. 22, 2025

Language: Английский

Citations

0
Enhanced Photoactivated Circularly Polarized Afterglow with High Dissymmetry Factor and Tunable Emission DOI Open Access
Yuxia Zhang, Yu-Chang Wang,

Junjie Wu

et al.

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

Published: Feb. 5, 2025

Abstract Photoactivated circularly polarized afterglow (CPA) exhibits broad application prospects in various optoelectronic areas due to its multidimensional emission characteristics, including wavelengths, lifetimes, and chirality. Achieving photoactivated CPA with extremely high dissymmetry factor ( g lum ) values is highly desired but considerably challenging. This work reports a bilayer assembly (R/S‐CLC‐TPB) integrating TPB@PMMA thin film the selective reflection of cholesteric liquid crystals. Initially, R/S‐CLC‐TPB no emission, while following 1 min UV irradiation, it achieves an noticeable long lifetime 125 ms value up 1.6. enhancement can be attributed oxygen consumption properties under subsequently minimizing loss triplet exciton. Furthermore, by employing triplet‐singlet Förster resonance energy transfer (TS‐FRET) strategy from organic persistent room‐temperature phosphorescence donor fluorescent dye acceptor, color successfully modulated green orange. Ultimately, these materials demonstrate promising capabilities for advanced multi‐level information encryption utilizing their tunable color, create multiple layers that selectively accessed decoded based on photoactivation chiroptical properties.

Language: Английский

Citations

0
Multiple stimuli-responsive circularly polarized luminescent bio-composite films by coassembling cellulose nanocrystals and curcumin DOI

Shiqian Cao,

Jingpeng Wang,

Wenye Sun

et al.

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

Published: Feb. 16, 2025

Language: Английский

Citations

0
The liquid crystalline and optical properties of chiral symmetrical dimers with two azo groups and 1,2-propanediol chiral moiety DOI
Yan Chen, Yajuan Chen,

Niu‐niu Zhang

et al.

Journal of Molecular Structure, Journal Year: 2025, Volume and Issue: unknown, P. 141794 - 141794

Published: Feb. 1, 2025

Language: Английский

Citations

0
Chiral Cross-Linked Covalent Organic Framework Films for Highly Sensitive Circularly Polarized Luminescence Probing DOI

Shui-Ming Jing,

Zhi‐Gang Gu, Jian Zhang

et al.

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

Published: March 3, 2025

The development of covalent organic framework (COF) films featuring circular polarization luminescence (CPL) probing remains a formidable challenge. Herein, we developed chiral cross-linked COF film to obtain uniform and dense (chirCOFilm) possessing highly sensitive CPL for enantiomers. axial cross-linkers (R-/S-BBNA) are initially introduced into the channels (COFilm/R-BBNA or COFilm/S-BBNA) by vapor-assisted epitaxial method. Then, olefin groups in R-/S-BBNA layers undergo cross-linking reaction under UV irradiation, forming chirCOFilm. obtained chirCOFilms have strong chirality with mirror images, fluorescence discoloration, intense properties. A multitude rich photopatterns chirCOFilm/PDMS flexible prepared taking advantage photochromic properties during illumination, showing potential application advanced anticounterfeiting. More importantly, realize phenethylamine enantiomers at 5% concentration, which can hardly be achieved from their corresponding probing. This study not only provides new strategy preparing using but also opens avenue achieving though CPL.

Language: Английский

Citations

0
MAPbBr3 Quantum Dots Encapsulated Within Lanthanide‐MOFs for Time‐Resolved Multicolor Dynamic Anticounterfeiting DOI Open Access
Jiachen Wang, Zhenhua Gao,

Yajun Jia

et al.

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

Published: March 10, 2025

Multicolor dynamic optical materials exhibit significant potential in the realms of anticounterfeiting and information encryption, benefitting from their capacity for generating unpredictable that changes over time. Herein, a novel approach is presented utilizing quantum-confinement effect MAPbBr3 quantum dots (QDs) embedded within lanthanide-metal organic frameworks (Ln-MOFs) time-resolved multicolor applications. The dimensions QDs undergo temporal variations during situ growth, resulting alterations luminescent color due to effect. Furthermore, emission colors MAPbBr3@Eu-MOFs can be modulated by varying UV excitation wavelengths, thereby conferring spatially distinguishable dimension. unpredictability these coupled with sustained intensity multi-dimensional anticounterfeiting, render them suitable system advanced graphical coding. These findings pave way advancement intelligent anticounterfeiting.

Language: Английский

Citations

0