Photo-triggered full-color circularly polarized luminescence based on photonic capsules for multilevel information encryption

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: May 25, 2023

Materials with phototunable full-color circularly polarized luminescence (CPL) have a large storage density, high-security level, and enormous prospects in the field of information encryption decryption. In this work, device-friendly solid films color tunability are prepared by constructing Förster resonance energy transfer (FRET) platforms chiral donors achiral molecular switches liquid crystal photonic capsules (LCPCs). These LCPCs exhibit photoswitchable CPL from initial blue emission to RGB trichromatic signals under UV irradiation due synergistic effect chirality show strong time dependence because different FRET efficiencies at each node. Based on these response characteristics, concept multilevel data using LCPC is demonstrated.

Language: Английский

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Fluorescent TPE Macrocycle Relayed Light-Harvesting System for Bright Customized-Color Circularly Polarized Luminescence

Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(12), P. 5389 - 5399

Published: March 18, 2022

Artificial systems for sequential chirality transmission/amplification and energy relay are perpetual topics that entail learning from nature. However, engineering chiral light-harvesting supramolecular remains a challenge. Here, we developed new with Förster resonance transfer process where designed blue-violet-emitting BINOL (1,1'-Bi-2-naphthol) compound, BINOL-di-octadecylamide (BDA), functions as an initiator of light absorbance, green-emitting hexagonal tetraphenylethene-based macrocycle (TPEM) aggregation-induced emission serves conveyor, Nile red (NiR) or/and near-infrared dye, tetraphenylethene (TPE)-based benzoselenodiazole (TPESe), the terminal acceptors. Benefiting close contact large optical overlap between donors acceptors at each level, triad tetrad relaying sequentially efficiently furnish along cascaded line BDA-TPEM-NiR (or/and TPESe), leading to bright customized-color circularly polarized luminescence (CPL) white-light-emitting CPL (CIE coordinates: 0.33, 0.34) amplified dissymmetry factor (glum) 3.5 × 10-2 over wide wavelength range. This work provides direction construction broad range applications in chiroptical physics chemistry.

Language: Английский

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Liquid Crystal Assembly for Ultra-dissymmetric Circularly Polarized Luminescence and Beyond

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(24), P. 12951 - 12966

Published: June 5, 2023

Circularly polarized luminescence (CPL) is attracting much interest because it can carry extensive optical information. CPL shows left- or right-handedness and be regarded as part of high-level visual perception to supply an extra dimension information with regard regular light. A key meeting the needs for practical applications develop emerging field ultra-dissymmetric CPL. Chiral liquid crystal (LC) assemblies─otherwise referred cholesteric crystals (CLCs)─are essentially organized helical superstructures a highly ordered one-dimensional orientation, distinctly superior supramolecules. CLCs achieve perfect equilibrium molecular short-range interaction long-range orientational order, enabling molecule-scale chirality on pitch observable scale. LC assembly could ideal strategy amplifying chirality, making accessible Herein, we focused some basic but important issues regarding CPL: (i) How created from chiral dyes? (ii) Is luminescent dyes essential factor generation CPL? That is, all emit vice versa? (iii) transferred within intermolecular systems, what principles transmission should followed? Given these queries our work, in this Perspective discuss generation, transmission, modulation assembly, aiming design build up novel chiroptical materials. Recent CPL-active microstructures three-dimensional displays, circularly lasers, asymmetric catalysis are also discussed.

Language: Английский

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Multimodal-Responsive Circularly Polarized Luminescence Security Materials

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(7), P. 4246 - 4253

Published: Feb. 1, 2023

Nations, industries, and aspects of everyday life have undergone forgery counterfeiting ever since the emergence commercialization. Securing documents products with anticounterfeit additives shows promise for authentication, allowing one to combat ever-increasing global counterfeiting. One most-used effective encryption strategy is combine optical-security markers on required protection objects; however, state-of-the-art labels still suffer from imitation due their poor complexity easy forecasting, as a result deterministic production. Developing advanced anticounterfeiting tags unusual optical characters further incorporating complex security features are desired achieve multimodal, unbreakable authentication capacity; unfortunately, this has not yet been achieved. Here, we prepare series stable circularly polarized luminescence (CPL) materials, composed toxicity-free, high-quality-emitting inorganic quantum dots (QDs) liquid crystals, using designed helical-coassembly strategy. This CPL system achieves figure merit (FM, assessing performance both dissymmetry yield) value 0.39, fulfilling practical demands applications. Based these structures, produce type multimodal-responsive materials (MRSMs) that exhibits six different stimuli-responsive modes, including light activation, polarization, temperature, voltage, pressure, view angle. Thus, show proof-of-principle blockchain-like integrated system, multimodal-responsive, interactive/changeable information encryption–decryption. We encapsulate obtained into fiber expand our work flexible fabrics, is, building an intelligent textile color-adaptable function along environmental change.

Language: Английский

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Frontiers in Circularly Polarized Phosphorescent Materials

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(20)

Published: Feb. 20, 2023

Abstract Circularly polarized luminescence (CPL) materials have received increasing attention in recent years. Amongst various CPL materials, circularly phosphorescence (CPP) featuring long life‐time represent a novel research frontier and exhibit promising applications fields. Herein, the state‐of‐the‐art advances of CPP are systematically summarized, as classified into transition metal complexes, organic small molecules, polymers, organic/inorganic hybrid materials. Besides, light‐emitting diodes encryption display also summarized. Furthermore, current challenges future perspectives put forward. It is expected that this review will offer more inspirations for rational design advanced thus further promoting their practical applications.

Language: Английский

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Self-assembled stereomutation with supramolecular chirality inversion

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(13), P. 4443 - 4487

Published: Jan. 1, 2023

Supramolecular chirality inversion is closely related to biological and chemical self-assembly systems. This review highlights the fundamental principles, various strategies, promising applications of supramolecular inversion.

Language: Английский

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Liquid Crystals Doped with Chiral Fluorescent Polymer: Multi‐Color Circularly Polarized Fluorescence and Room‐Temperature Phosphorescence with High Dissymmetry Factor and Anti‐Counterfeiting Application

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

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Inverted Circularly Polarized Luminescence Behavior Induced by Helical Nanofibers through Chiral Co-Assembly from Achiral Liquid Crystal Polymers and Chiral Inducers

ACS Nano, Journal Year: 2022, Volume and Issue: 16(2), P. 3173 - 3181

Published: Feb. 10, 2022

Chiral supramolecular assembly can provide a powerful strategy for developing circularly polarized luminescence (CPL)-active materials by forming helices or superhelices into single multiple components. Herein, we chose three achiral liquid crystal polymers (LC-P1/P2/P3) and chiral binaphthyl-based inducers (R/S-M) with anchored dihedral angles to construct co-assemblies explore the induced CPL behavior from pyrenyl (Py) emitters in LC through regulation of helical nanofibers during co-assembly process. Most interestingly, (R/S-M)0.1-(P3)0.9 emitted an inverted blue-colored signal thermal annealing treatment at glass transition temperature due flexible main chain polymer (LC-P3). The strongest emission spin-coated film (λem = 455 nm, |gem| 6.47 × 10-2, ΦF 48.5%) could be detected using 105 °C.

Language: Английский

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Intense Circularly Polarized Fluorescence and Room-Temperature Phosphorescence in Carbon Dots/Chiral Helical Polymer Composite Films

ACS Nano, Journal Year: 2023, Volume and Issue: 17(7), P. 6912 - 6921

Published: March 31, 2023

Chiral carbon dots (C-dots) with a circularly polarized fluorescence (CPF) property have attracted tremendous attention due to their significant applications in chiral optoelectronics and theranostics. However, constructing room-temperature phosphorescent (CPRTP) C-dots remains great challenge. Herein, strategy is established achieve efficient CPF CPRTP emissions C-dots/chiral helical polymer bilayer composite film. Taking advantage of the filter effect polymer, intense large dissymmetric factors up 1.4 × 10-1 1.2 10-2 are respectively obtained, even though there only simple interface contact between layer layer. More importantly, white-color emission multiple information display encryption further realized based on prepared luminescent films.

Language: Английский

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Biobased and biodegradable films exhibiting circularly polarized room temperature phosphorescence

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

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