Flexible Anti‐Counterfeiting Circularly Polarized Luminescent Elastomer from Supramolecular Polyurethanes DOI
Huimin Duan, Jinbiao Zhao, Shuli Li

и другие.

Advanced Optical Materials, Год журнала: 2024, Номер 12(20)

Опубликована: Июнь 10, 2024

Abstract Supramolecular polymers with circularly polarized luminescence (CPL) have promoted future intelligence development of polymer‐based materials for flexible display. However, preparing CPL simultaneous enhanced dissymmetry factor (| g lum |) and mechanical performance industrial applications remains challenging. This work develops an eco‐friendly preparation method elastomers from supramolecular polyurethanes bearing chiral fluorescent S (or R)‐1,1′‐Bi(2‐naphthol) (BINOL) groups in a solvent‐free system. Surprisingly, polymer system containing 0.0028 mol% BINOL unit is sufficient to emit the significant CPL‐activity | value 2.30 × 10 −2 , appear good toughness 56.28 ± 3.9 MJ·m −3 thereby exhibit multiple anti‐counterfeiting behaviors. The long‐range ordered microphase arrangement key improving both properties |. attributed in‐situ additive polymerization BINOL‐based isocyanate prepolymer macromolecular polyols induced helical structure, afforded solid‐state films flexibility amplification. Furthermore, these results Circular dichroism, CPL, Fourier transform infrared, X‐ray diffraction analyses, atomic force microscope confirm formation through synergistic effect hydrogen bonding π–π interactions. offers insights into construction developing novel display materials.

Язык: Английский

Light-triggered fluorochromic cholesteric liquid crystal elastomer with hydrogen-bonded fluorescent switch: dualmodal-switchable circularly polarized luminescence DOI
Siyang Lin,

Tianqi Ren,

Xianyu Meng

и другие.

Science China Chemistry, Год журнала: 2024, Номер 67(8), С. 2719 - 2727

Опубликована: Июль 1, 2024

Язык: Английский

Процитировано

11
A Dynamic H‐Bonding Network Enables Stimuli‐Responsive Color‐Tunable Chiral Afterglow Polymer for 4D Encryption DOI Open Access

Guangyao Guo,

Huanhuan Li,

Yingmeng Yan

и другие.

Advanced Materials, Год журнала: 2024, Номер 36(47)

Опубликована: Окт. 6, 2024

Abstract The development of stimuli‐responsive and color‐tunable chiral organic afterglow materials has attracted great attention but remains a daunting challenge. Here, simple yet effective strategy through the construction dynamic H‐bonding network is proposed to explore multi‐color by doping self‐designed phosphorescent chromophore into polyvinyl alcohol matrix. A deep blue system with lifetime up 3.35 s, quantum yield 25.0%, luminescent dissymmetry factor 0.05 achieved reversible formation breakdown upon thermal‐heating water‐fumigating. Moreover, can be obtained energy transfer, allowing establishment information displays high‐level 4D encryption. This work not only offers facile platform develop advanced also opens new avenue for developing next‐generation optical technology enhanced functionality responsiveness.

Язык: Английский

Процитировано

11
Acceptor Copolymerized Axially Chiral Conjugated Polymers with TADF Properties for Efficient Circularly Polarized Electroluminescence DOI Creative Commons
Wenlong Zhao,

Ke‐Ke Tan,

Wei‐Chen Guo

и другие.

Advanced Science, Год журнала: 2024, Номер 11(23)

Опубликована: Март 29, 2024

Abstract Chiral conjugated polymer has promoted the development of efficient circularly polarized electroluminescence (CPEL) device, nevertheless, it remains a challenge to develop chiral polymers with high performance. Herein, by acceptor copolymerization axially biphenyl emitting skeleton and benzophenone, pair namely R ‐ PAC S are synthesized. The target exhibit obvious thermally activated delayed fluorescence (TADF) activities photoluminescence quantum yields 81%. Moreover, display significant luminescence features, dissymmetry factor (| g lum |) nearly 3 × 10 −3 . By using as emitters, corresponding organic light‐emitting diodes (CP‐OLEDs) CPEL signals | EL 3.4 maximum external efficiency (EQE max ) 17.8%. Notably, considering both EQE comprehensively, device performance is best among all reported CP‐OLEDs emitters. This work provides facile approach constructing TADF discloses potential luminescent skeletons in architecting high‐performance CP‐OLEDs.

Язык: Английский

Процитировано

9
Stimuli-responsive circularly polarized luminescence with chiroptical amplification and inversion enabled by cholesterically assembled bio-materials DOI
Qing Miao, Xi Wang,

Bowen Jin

и другие.

Journal of Materials Chemistry C, Год журнала: 2024, Номер 12(13), С. 4861 - 4869

Опубликована: Янв. 1, 2024

CPL active materials with a tunable g lum -factor, from −0.30 to 0.04, were fabricated by incorporating responsive organic dye into cellulose nanocrystals. Such films showed dynamic switchable signal in intensity and handedness at different pH.

Язык: Английский

Процитировано

8
Dual Enhancement of Phosphorescence and Circularly Polarized Luminescence through Entropically Driven Self‐Assembly of a Platinum(II) Complex DOI
Yanqing Wang, Na Li,

Liangwen Chu

и другие.

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(22)

Опубликована: Март 18, 2024

Addressing the dual enhancement of circular polarization (g

Язык: Английский

Процитировано

8
Directed Chiral Self‐Assembly of Purely Organic Phosphors for Room‐Temperature Circularly Polarized Phosphorescence DOI Creative Commons

Jung‐Moo Heo,

John Kim, Md Ikramul Hasan

и другие.

Advanced Optical Materials, Год журнала: 2024, Номер 12(21)

Опубликована: Апрель 20, 2024

Abstract Circularly polarized phosphorescence (CPP) is increasingly recognized in materials science for its unique applications optoelectronic devices, chiral recognition, and bioimaging. This study underscores a novel directed self‐assembly strategy of purely organic phosphors into supramolecular nanostructures to achieve bright room‐temperature circularly (RT‐CPP). RT‐CPP molecules are built on an aromatic carbonyl structure having also Br mix (n,π*) (π,π*) characters enable the heavy atom effect. Side chains rationally designed have strong hydrogen bonding, van der Waals interactions, center nanostructures. The tightly packed resulting impower efficient suppression molecular motions, thereby minimizing non‐radiative decay facilitating CPP emission at room temperature. developed self‐assembled structures exhibit with dissymmetry factor ( g lum ) ≈10 −3 , high quantum yield 4.1%, rapid triplet time 180 microseconds. presented design principle enabling from may pave way photonic materials.

Язык: Английский

Процитировано

8
A Multiple Circularly Polarized Luminescence Regulation Platform Driven by Acid, Base, and Primary Amines DOI
Jing Li, Guojian Yang,

Aiyan Shi

и другие.

Advanced Optical Materials, Год журнала: 2024, Номер 12(19)

Опубликована: Апрель 30, 2024

Abstract Functional materials that exhibit circularly polarized luminescence (CPL) have shown immense potential in applications such as 3D optical displays and advanced information encryption. However, facile efficient regulation of the multiple emission properties chiral systems has remained a challenge due to scarcity suitable complexity systems. Herein, CPL platform is fabricated by helical co‐assembly an aldehyde‐functionalized fluorane dye (Rhodol‐CHO, 6′‐(diethylamino)‐3′‐hydroxy‐3‐oxo‐3H‐spiro[isobenzofuran‐1,9′‐xanthene]‐4′‐carbaldehyde) liquid crystals, which can efficiently combine stimuli‐responsive characteristics high activity. By introducing acid, base, compounds containing primary amino (─NH 2 ) groups, property system be easily modified. The obtained apparent asymmetry, with g lum values reaching 0.54–0.75). Further, these modules are successfully applied multi‐mode encryption, highlighting their practical utility. Therefore, this study presents novel strategy for developing diverse behaviors based on simple‐designed platform, advancing further materials.

Язык: Английский

Процитировано

8
Mechanically Tunable Circularly Polarized Luminescence of Liquid Crystal‐Templated Chiral Perovskite Quantum Dots DOI
Xuan Zhang, Lin Li, Yuanhao Chen

и другие.

Angewandte Chemie, Год журнала: 2024, Номер 136(22)

Опубликована: Март 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.

Язык: Английский

Процитировано

7
Construction of Circular Polarized Luminescence Molecules for Intense Near Infrared OLEDs DOI

Ning Liang,

Jianxun Liu,

Yufan Lin

и другие.

Advanced Optical Materials, Год журнала: 2024, Номер 12(16)

Опубликована: Март 14, 2024

Abstract The exploration of organic near‐infrared (NIR) luminescence, along with circularly polarized luminescence (CPL), is vital importance due to its significance in medical and optoelectronic applications. Integrating a chiral unit into D–A molecular structure this research realized emission peaks at 744 nm, exhibiting dissymmetric factor −1.67 × 10 −3 . introduced TPA derivative not only imparts aggregation‐induced properties CPL capabilities but also induces redshift the spectrum. Consequently, fabricated NIR light‐emitting devices (OLEDs), achieve maximum electroluminescent 748 nm nondoped external quantum efficiency 13.7% doped devices. This pioneering provides inspiration for design molecules possessing future, particularly promoting application intense NIR‐OLEDs.

Язык: Английский

Процитировано

6
Circularly Polarized Organic Ultralong Room‐Temperature Phosphorescence: Generation, Enhancement, and Application DOI Open Access

Jiao Liu,

Xinyu Zhou, Xianhui Tang

и другие.

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 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.

Язык: Английский

Процитировано

5