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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Stimulus-responsive polymer materials toward multi-mode and multi-level information anti-counterfeiting: recent advances and future challenges

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 53(2), P. 606 - 623

Published: Dec. 15, 2023

This review highlights the recent advances and discusses challenges perspectives of stimulus-responsive polymer (SRP)-based information-storage materials, which exhibit multi-mode or multi-level anti-counterfeiting performance.

Language: Английский

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Photo‐Stimuli‐Responsive Dual‐Emitting Luminescence of a Spiropyran‐Encapsulating Metal–Organic Framework for Dynamic Information Encryption

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(26)

Published: March 9, 2023

The development of photo-stimuli-responsive luminescent materials is essential to address emerging demands in encryption security. Here, a novel dual-emitting material ZJU-128⊃SP (SP = spiropyran) reported, which obtained by encapsulating spiropyran molecules into cadmium-based metal-organic framework (MOF), [Cd3 (TCPP)2 ]·4DMF·4H2 O (ZJU-128, H4 TCPP 2,3,5,6-tetrakis (4-carboxyphenyl)pyrazine). This MOF/dye composite exhibits blue emission from the ligand ZJU-128 at 447 nm and red around 650 spiropyran. Utilizing photoisomerization ring-closed ring-open form under UV-light irradiation, significant fluorescence resonance energy transfer (FRET) process between achieved. As result, gradually decreased while increases. dynamic fluorescent behavior can fully recover original state following exposure visible light (>405 nm). By taking advantage time-dependent fluorescence, dynamical anti-counterfeiting patterns multiplexed coding are successfully developed based on film. work provides an inspiring point for design information with higher security requirements.

Language: Английский

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Photoswitchable and Reversible Fluorescent Eutectogels for Conformal Information Encryption

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(46)

Published: Oct. 4, 2023

Smart fluorescent materials that can respond to environmental stimuli are of great importance in the fields information encryption and anti-counterfeiting. However, traditional usually face problems such as lack tunable fluorescence insufficient surface-adaptive adhesion, hindering their practical applications. Herein, inspired by glowing sucker octopus, we present a novel strategy fabricate reversible eutectogel with high transparency, adhesive self-healing performance for conformal Using anthracene luminescent unit, exhibits photoswitchable therefore be reversibly written/erased patterns non-contact stimulation. Additionally, different from mechanically irreversible adhesion via glue, adhere various irregular substrates over wide temperature range (-20 65 °C) conformally deform more than 1000 times without peeling off. Furthermore, exploiting transparency good stretchability eutectogel, dual achieved under UV stretching conditions further improve security level. This study should provide promising future development advanced intelligent anti-counterfeiting materials.

Language: Английский

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Synergetic Conformational Regulations in Ground and Excited States for Realizing Stimulus-Responsive and Wide-Tuning Room-Temperature Phosphorescence

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(30), P. 16748 - 16759

Published: July 20, 2023

Understanding the changes of molecular conformations is crucial for realizing multiple emissive triplet states in room-temperature phosphorescence (RTP) materials. In this work, we report two molecules, 4,4'-dimethylbenzil (DMBZ) and 4,4'-di-tert-butylbenzil (DBBZ) with conformation-dependent luminescence, demonstrate that stimulus-responsive wide-tuning RTP emissions can be realized via synergetic conformational regulations ground excited states. Due to changes, DMBZ DBBZ show abundant variations upon external stimuli, including light, force, heat, fumigation. Notably, exhibits both states, which endow unique behaviors. presents phase transitions between supercooled liquid state different solid accompanied by transitions, excited-state are effectively regulated. Moreover, wide-range (between cyan, green, yellow) single component host-guest systems DBBZ, showing potential applications temperature sensing, multicolor dynamic displays, information encryption. These results may provide new visions understanding complicated aggregated state, as well insights into relationship conformations, emissions, stimulus responsiveness.

Language: Английский

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Time-resolved encryption from a spiropyran derivative: High-contrasted and multi-state mechanochromism, photochromism and thermochromism

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 469, P. 143781 - 143781

Published: June 1, 2023

Language: Английский

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Multimodal dynamic and unclonable anti-counterfeiting using robust diamond microparticles on heterogeneous substrate

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

Published: May 2, 2023

The growing prevalence of counterfeit products worldwide poses serious threats to economic security and human health. Developing advanced anti-counterfeiting materials with physical unclonable functions offers an attractive defense strategy. Here, we report multimodal, dynamic labels based on diamond microparticles containing silicon-vacancy centers. These chaotic are heterogeneously grown silicon substrate by chemical vapor deposition, facilitating low-cost scalable fabrication. intrinsically introduced the randomized features each particle. highly stable signals photoluminescence from centers light scattering can enable high-capacity optical encoding. Moreover, time-dependent encoding is achieved modulating via air oxidation. Exploiting robustness diamond, developed exhibit ultrahigh stability in extreme application scenarios, including harsh environments, high temperature, mechanical abrasion, ultraviolet irradiation. Hence, our proposed system be practically applied immediately as diverse fields.

Language: Английский

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High‐Temperature, Reversible, and Robust Thermochromic Fluorescence Based on Rb₂MnBr₄(H₂O)₂ for Anti‐Counterfeiting

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(35)

Published: May 12, 2023

Thermochromic fluorescent materials (TFMs) characterized by noticeable emission color variation with temperature have attracted pervasive attention for their frontier application in stimulus-response and optical encryption technologies. However, existing TFMs typically suffer from weak PL reversibility as well limited mild operating severe quenching. switching under extreme conditions such high will undoubtedly improve security, while it is still challenging present TFMs. In this work, high-temperature thermochromic fluorescence up to 473 K robust structural of 80 cycles are observed Rb2 MnBr4 (H2 O)2 related crystals, which seldom reported changes at a temperature. Temperature-driven nonluminous, red green light states can be achieved specific temperatures the modulation mechanism verified situ measurements single particle transition. By virtue unique feature, multicolor anti-counterfeiting label based on broad gradient multidimensional information applications demonstrated. This work opens window design inorganic multi-PL change development advanced strategies stimuli source.

Language: Английский

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Full-Color Circularly Polarized Luminescence of Supramolecular Polymers with Handedness Inversion Regulated by Anion and Temperature

ACS Nano, Journal Year: 2024, Volume and Issue: 18(3), P. 2279 - 2289

Published: Jan. 11, 2024

Constructing full-color circularly polarized luminescence (CPL) materials with switchable handedness in the solid state is an appealing yet considerably challenging task, especially for supramolecular polymer films assembled from homochiral monomers. Herein, polymers CPL and inverted are realized through coassembly of a cholesterol derivative (PVPCC), metal ions (Zn2+), achiral fluorescent dyes. The obtained coassembled systems show anion-directed chirality inversion by exchanging anions NO3–, ClO4–, BF4–, Cl–. For instance, negative CD right-handed detected PVPCC/Zn(NO3)2 aggregates, which convert into positive left-handed after introducing Cl–, corresponding to transformation nanorods nanofibers. Furthermore, tunable color system dyes can be established alternately changing assembling temperature 298 273 K. Importantly, polymeric then constructed doping PVPCC/Zn(NO3)2/dyes complexes poly(methyl methacrylate) (PMMA) film, maintains shows enhanced performance. work not only deepens understanding chemistry but also helps construct building blocks science.

Language: Английский

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Dual‐Mode Hydrogels with Structural and Fluorescent Colors toward Multistage Secure Information Encryption

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(28)

Published: May 14, 2024

Abstract Constructing an anti‐counterfeiting material with non‐interference dual optical modes is effective way to improve information security. However, it remains challenging achieve multistage secure encryption due the limited stimulus responsiveness and color tunability of current dual‐mode materials. Herein, a hydrogel both independently tunable structural fluorescent colors toward encryption, reported. In this system, rigid lamellar structure poly(dodecylglyceryl itaconate) (pDGI) formed by shear flow‐induced self‐assembly provides restricted domains wherein monomers undergo polymerization form network, producing color. The introduction monomer 6‐acrylamidopicolinate (6APA) as complexation site possibility formation. hydrogel's angle‐dependent can be controlled adjusting crosslinking density water content. Additionally, fluorescence modulated ratio lanthanide ions. Information displayed separately in different channels synergistically overlayed read ultimate message. Thus, system based on devised through programed decryption process. This strategy holds tremendous potential platform for encrypting safeguarding valuable authentic field anti‐counterfeiting.

Language: Английский

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