Integrating Full‐Color 2D Optical Waveguide and Heterojunction Engineering in Halide Microsheets for Multichannel Photonic Logical Gates

Advanced Science, Journal Year: 2024, Volume and Issue: 11(17)

Published: Feb. 29, 2024

Ensuring information security has emerged as a paramount concern in contemporary human society. Substantial advancements this regard can be achieved by leveraging photonic signals the primary carriers, utilizing logical gates capable of wavelength tunability across various time and spatial domains. However, challenge remains rational design materials possessing space-time-color multiple-resolution capabilities. In work, facile approach is proposed for crafting metal-organic halides (MOHs) that offer resolution. These MOHs integrate time-resolved room temperature phosphorescence color-resolved excitation dependencies with both space-resolved ex situ optical waveguides heterojunctions. Capitalizing on these multifaceted properties, MOHs-based two-dimensional (2D) heterojunctions exhibit ability to tune full-color emissions spectra from blue red, operating within different temporal scales. Therefore, work introduces an effective methodology engineering resolved MOH microstructures, holding significant promise development high-density devices.

Language: Английский

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Visible‐Light Manipulated Reversible and Ultralong Phosphorescence of Carbon Dots Through Dynamic Cross‐Linking

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(45)

Published: May 29, 2024

Abstract Dynamic organic room‐temperature phosphorescence (RTP) materials are highly promising for various applications. However, developing photo‐responsive RTP systems with simple fabrication, high reversibility, and visible‐light responsiveness presents a significant challenge. Herein, in situ embedding of boron‐doped carbon dots (B‐CDs) amorphous polymer (pPBA) is achieved by two‐step polymerization carbonization process. Impressively, the B‐CDs@pPBA composite exhibits visible‐light‐activated ultralong full reversibility lifetime on–off ratio exceeding 280. By correlating photophysical properties structural characterization results, it concluded that photoinduced intensifying crosslinking between B‐CDs pPBA responsible dynamic RTP. More interestingly, film found to display bending actuation reversible deformable behavior upon light exposure. Finally, potential applications such programmable information storage encryption demonstrated. This research may pave new way development nanomaterials promote their use wide range

Language: Английский

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Assembly‐Induced Dynamic Structural Color in a Host‐Guest System for Time‐Dependent Anticounterfeiting and Double‐Lock Encryption

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(26)

Published: April 10, 2024

Manipulation of periodic micro/nanostructures in polymer film is great importance for academics and industrial applications anticounterfeiting. However, with the increasing demand on information security, materials time-dependent features are urgently required, especially material where same can appear more than once time scale. Here, one concise strategy to realize anticounterfeiting "double-lock" encryption based a host-guest system proposed, photoresponsive azopolymer as host liquid-crystalline molecule guest. The exhibits tunable mass transport pre-designed by tailoring process cis-to-trans recovery azo groups assembly mesogenic trans-isomers, resulting dynamic structural color film. Taking advantage this extraordinary feature, has been achieved. More importantly, each state's appearance whole be modulated changing ratio. Combining manipulatable unique decoding method, stored decrypted correctly. This work provides an unprecedented approach advanced technology higher level security high-end encryption.

Language: Английский

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A Facile Strategy for Achieving Polymeric Afterglow Materials with Wide Color‐Tunability and Persistent Near‐Infrared Luminescence

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(12)

Published: Dec. 10, 2023

Abstract Polymer‐based room‐temperature phosphorescence (RTP) materials show promising applications in anti‐counterfeiting. To further realize multiscale and/or multimodal anti‐counterfeiting, it is highly desirable to develop polymeric afterglow with multiple security features. Herein, a facile strategy presented endow ultralong lifetime, wide color‐tunability, persistent near‐infrared (NIR) luminescence, and good water solubility via constructing non‐traditional resonance energy transfer (PRET) two‐step sequential systems. Specifically, the 1‐bromocarbazole derivatives blue‐color RTP property act as donor while traditional dyes red/NIR luminescence acceptor. By simply regulating doping composition concentration of these systems, multicolor organic covering from visible NIR region successfully realized. Notably, compared single‐step PRET, has unique advantages higher efficiency triplet excitons initial donor, wider range color‐tunability mediated by intermediary acceptor, enhanced delayed fluorescence final Finally, water‐soluble great potential advanced anti‐counterfeiting information technologies.

Language: Английский

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Single-actuated and fully recyclable phase change materials enabled multiple thermochromism toward information storage and encryption

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 481, P. 148698 - 148698

Published: Jan. 12, 2024

Language: Английский

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Flexible Organic Chiral Crystals with Thermal and Excitation Modulation of the Emission for Information Transmission, Writing, and Storage

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(15)

Published: Feb. 10, 2024

Organic single crystals quickly emerge as dense yet light and nearly defect-free media for emissive elements. Integration of functionalities control over the properties is currently being explored a wide range these materials to benchmark their performance against organic diluted in powders or films. Here, we report mechanically flexible chiral capable an unprecedented combination fast, reversible, low-fatigue responses. UV-excited both enantiomers material, 4-chloro-2-(((1-phenylidene)imino)methyl)phenol, exhibit drastic reversible change emission color from green orange-yellow within second can be cycled at least 2000 times. The photoresponse was found depend strongly on excitation intensity temperature. Combining chirality, mechanical compliance, rapid switching, multiple responses, writability by UV light, this material provides unique versatile platform developing crystal-based on-demand signal transfer, information storage, cryptography.

Language: Английский

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Hydrogen Bond‐Associated Photofluorochromism for Time‐Resolved Information Encryption and Anti‐counterfeiting

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 23, 2024

Abstract Time‐resolved photofluorochromism constitutes a powerful approach to enhance information encryption security but remains challenging. Herein, we report strategy of using hydrogen bonds regulate the time for initiating photofluorochromism. In our strategy, copolymers containing negative photochromic spiropyran (NSP), naphthalimide, and multiple hydrogen‐bonding (UPy) units are designed, which display photo‐switchable fluorescence resonance energy transfer (FRET) process from naphthalimide donor NSP acceptor. Interestingly, FRET is locked via dynamic interaction between ring‐opened UPy moieties, resulting in time‐dependent fluorescence. The change can be finely regulated fraction polymers. Besides novel fluorescence, polymers also take advantage visible‐light triggerable, excellent photostability, photoreversibility, processability. We demonstrate that these properties enable them many application opportunities such as fluorescent labels multilevel patterns.

Language: Английский

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

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(47)

Published: Oct. 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.

Language: Английский

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Naphthalimide‐Conjugated Spiropyran: Dual‐State Emission and Photo‐Responsive Dynamic Fluorescence Color for Information Encryption Application

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

Published: Feb. 14, 2025

Abstract Developing photo‐switch molecules that show fluorescence in both monomeric and aggregated states, with light‐controllable wavelength is far‐reaching a great challenge. Spiropyran (SP) has received considerable attention this field. Herein, by conjugating naphthalimide to the indole moiety of SP, new spiropyran derivative, named NMI‐SP obtained. shows dual‐state emission excellent its attributed intramolecular charge transfer character. Moreover, demonstrates obvious photochromic behavior, accompanied visible color change from yellow green THF solution, photo‐responsive orange red state. This work provides insights into design materials based on SP fluorophore highlights their potential applications digital coding information conversion.

Language: Английский

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High‐Security Plastic with Integrated Holographic and Phosphorescent Images

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

Published: Feb. 19, 2025

Abstract Organic room temperature phosphorescence (ORTP) polymer materials have sparked considerable research interests in recent years, but their optical function is still limited for multi‐mode imaging. Herein, a feasible and universal approach proposed to endow ORTP with periodic refractive index modulation functions by holographic patterning. The key this design two‐stage stepwise crosslinking. Stage‐1, low crosslinking density (≤0.75 mol L −1 ), phosphorescence‐silent can provide greater free volume monomer diffusion thus facilitate the patterning of modulated holograms via photopolymerization‐induced phase separation. dense at stage‐2 turn on intensity rising 144% when increases from 3.77 4.12 . enhanced primarily ascribed increase conformational distortion spin‐orbit coupling organic phosphors based theoretical calculations. Eventually, first example demonstrated plastic unique capability independently displaying andphosphorescent images. This work not only provides novel paradigm impart added also paves way development high‐security combat counterfeiting.

Language: Английский

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