基于光调控胆甾相液晶的圆偏振发光材料的研究进展 DOI Creative Commons

Wenxin Kang,

Tianqi Ren,

Xianyu Meng

и другие.

Scientia Sinica Chimica, Год журнала: 2024, Номер 54(8), С. 1321 - 1328

Опубликована: Июнь 19, 2024

圆偏振发光(CPL)在手性荧光探针,圆偏振有机发光二极管,和光学防伪等领域具有潜在应用,为了扩大CPL材料的应用范围,研究人员开始关注刺激响应型CPL活性材料。胆甾相液晶(CLC)因其高度有序的手性环境以及优异的可调性已成为刺激响应CPL活性材料的理想选择。目前,基于CLC的光响应CPL材料已得到广泛开发,这些材料通常能在多组分系统中实现CPL信号响应。本综述重点关注CLC中光调控CPL的研究进展,总结了CPL调控的三种策略:(1)利用光驱动过程光开关分子的手性或螺旋变化调控CLC的CPL信号;(2)利用手性光开关与手性掺杂剂间手性竞争关系调控CLC的CPL信号;(3)利用光驱动非手性二向色性染料有序参数值变化调控CPL信号。这篇综述有望为基于光响应CLC的CPL调控提供重要的参考和指导,以推动其在更广泛领域的应用。

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

и другие.

Small, Год журнала: 2024, Номер unknown

Опубликована: Июнь 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.

Язык: Английский

Процитировано

13

Gradient‐Metasurface‐Contact Photodetector for Visible‐to‐Near‐Infrared Spin Light DOI Open Access
Chenglin He,

Zilan Tang,

Chunhua Wang

и другие.

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 16, 2025

Abstract Spin light detection is a rapidly advancing field with significant impact on diverse applications in biology, medicine, and photonics. Developing integrated circularly polarized (CPL) detectors pivotal for next‐generation compact polarimeters. However, previous CPL detectors, based natural materials or artificial resonant nanostructures, exhibit intrinsically weak polarization sensitivity, are susceptible to other states, suffer from limited bandwidths. A gradient‐metasurface‐contact photodetector demonstrated operating at zero‐bias high discrimination ratio (≈1.6 ✗ 10 4 ), broadband response (500–1100 nm), immunity non‐CPL components. The integrates InSe flakes CPL‐selective metasurface contacts, forming an asymmetric junction interface driven by CPL‐dependent unidirectional propagating surface plasmon waves, generating vectorial photocurrents. Furthermore, it implemented the developed multivalued logic system optical decoding of CPL‐encrypted communication signals. This contact engineering represents new paradigm property detection, paving way future optoelectronic systems on‐chip detection.

Язык: Английский

Процитировано

1

From nano to macro: Light‐driven chiral dopants in liquid crystals DOI Creative Commons
Yang Zhang, Ruoling Liu, Jiawen Chen

и другие.

Deleted Journal, Год журнала: 2025, Номер unknown

Опубликована: Март 20, 2025

Abstract Harnessing nanoscale molecular structural changes to achieve precise control over macroscopic devices represents an emerging and effective strategy. One promising approach involves the introduction of light‐driven chiral dopants into liquid crystals (LCs), enabling fine‐tuned modulation helical superstructures in cholesteric (CLCs) via photoisomerization. This strategy opens up exciting possibilities for development innovative photo‐responsive with dynamic functionalities. review focuses on most common used LCs, including azobenzene, diarylethene, α ‐cyanostilbene overcrowded alkene. The chemical design principles these four types switches are highlighted, along their abilities induce pitch inversion CLCs. Finally, applications controlling showcased, particularly display technologies, anti‐counterfeiting, optical 3D droplet manipulation. It is hoped that this provides valuable insights guidances novel advancement soft matter material applications.

Язык: Английский

Процитировано

1

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

и другие.

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 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.

Язык: Английский

Процитировано

8

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

и другие.

ACS Materials Letters, Год журнала: 2024, Номер 6(7), С. 2957 - 2963

Опубликована: Июнь 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.

Язык: Английский

Процитировано

7

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

и другие.

Journal of the American Chemical Society, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 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

Язык: Английский

Процитировано

7

Helical columnar phase of mesogen-jacketed liquid crystal polymers for efficient circularly polarized luminescence DOI

Zui Liu,

Fengyu Deng,

Chunyan Fan

и другие.

Journal of Materials Chemistry C, Год журнала: 2024, Номер 12(16), С. 5896 - 5907

Опубликована: Янв. 1, 2024

A copolymerization strategy for preparing mesogen-jacketed liquid crystal polymers with stable and good circularly polarized luminescence was developed in this paper.

Язык: Английский

Процитировано

4

Sign Inversion of Circularly Polarized Luminescence in Cholesteric Liquid Crystals Induced by Mercury Ions through Binaphthyl Dopants' Conjugation Control DOI
Lulu Li,

Peiting Jiang,

Xueyan Zhang

и другие.

Angewandte Chemie International Edition, Год журнала: 2024, Номер unknown

Опубликована: Сен. 16, 2024

Abstract Stimuli‐responsive circularly polarized luminescence (CPL) materials based on cholesteric liquid crystal (CLC) platforms show great promise for applications in information encryption and anticounterfeiting. In this study, we constructed a mercury ion‐responsive CPL system CLCs by controlling the conjugation degree of axially chiral binaphthyl derivatives. Two derivatives ( R / S ‐1 ‐2) were initially used as dopants to demonstrate that inversion g lum values from 0.5/‐0.44 −0.53/0.48) could be achieved modulating binaphthyls. Based concept, thioacetal ‐2S was developed mercury‐responsive dopant CLCs. Under Hg ion treatment, sign inverted value changed 0.22 −0.29) due transformation into an aldehyde group. Additionally, material applied encryption.

Язык: Английский

Процитировано

4

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

и другие.

ACS Materials Letters, Год журнала: 2025, Номер unknown, С. 654 - 659

Опубликована: Янв. 22, 2025

Язык: Английский

Процитировано

0

Dual‐Mode Regulation of Thermochromism in Polymer‐Dispersed Cholesteric Liquid Crystals for Photoaddressing Temperature‐Resolved Encryption DOI

Meihui Yan,

Yue Cao, Letian Dong

и другие.

Advanced Optical Materials, Год журнала: 2025, Номер unknown

Опубликована: Май 2, 2025

Abstract Cholesteric liquid crystals (CLCs), as photonic materials with unique temperature responsiveness, show great potential in smart optical applications. However, traditional CLC exhibit limitations self‐supporting properties and photoaddressing regulation of thermochromism. Here, dual‐wavelength responsive donor–acceptor Stenhouse adducts (DASAs) are incorporated to construct a sophisticated dual‐mode system for thermochromic polymer dispersed cholesteric (PDCLCs), wherein CLCs droplet form film. This research demonstrates both the reversible photoswitching irreversible Ultraviolet‐induced degradation DASAs can precisely regulate phase PDCLCs while maintaining Bragg reflection throughout visible spectrum. Based on these characteristics, novel temperature‐resolved is designed fabricating anti‐counterfeiting labels, including erasable disposable permanent temperature‐dependent storage indicators. Significantly, synergistic interaction between DASA's absorption PDCLC's achieves distinctive “flickering” effect (dynamic transitions: visible‐invisible‐visible) display. Moreover, enables dual‐photoaddressing encryption secret key within narrow window, creating “read‐and‐destroy” encryption. study presents photoregulation strategy multi‐mode display technology simple preparation convenient readout, paving new ways applications advanced information

Язык: Английский

Процитировано

0