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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Photoswitchable and Reversible Fluorescent Eutectogels for Conformal Information Encryption

Angewandte Chemie, Journal Year: 2023, Volume and Issue: 135(46)

Published: Oct. 4, 2023

Abstract 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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Design of Highly Efficient Electronic Energy Transfer in Functionalized Quantum Dots Driven Specifically by Ethylenediamine

JACS Au, Journal Year: 2024, Volume and Issue: 4(2), P. 545 - 556

Published: Jan. 23, 2024

The exploration of emerging functionalized quantum dots (QDs) through modulating the effective interaction between sensing element and target analyte is great significance for high-performance trace sensing. Here, chromone-based ligand grafted QDs (QDs-Chromone) were initiated to realize electronic energy transfer (EET) driven specifically by ethylenediamine (EDA) in absence spectral overlap. fluorescent colorimetric dual-mode responses (from red blue from colorless yellow, respectively) resulting expanded conjugated ligands reinforced analytical selectivity, endowing an ultrasensitive specific response submicromolar-liquid EDA. In addition, a QDs-Chromone-based chip was constructed achieve recognition EDA vapor with naked-eye observed at concentration as low 10 ppm, well robust anti-interfering ability complicated scenarios monitoring. We expect proposed EET strategy shaping will shine light on both rational probe design methodology deep mechanism exploration.

Language: Английский

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A sodium carboxymethyl cellulose-induced emission and gelation system for time-dependent information encryption and anti-counterfeiting

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 663, P. 707 - 715

Published: Feb. 29, 2024

Language: Английский

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Multiple photofluorochromic luminogens via catalyst-free alkene oxidative cleavage photoreaction for dynamic 4D codes encryption

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: May 31, 2024

Abstract Controllable photofluorochromic systems with high contrast and multicolor in both solutions solid states are ideal candidates for the development of dynamic artificial intelligence. However, it is still challenging to realize multiple photochromism within one single molecule, not mention good controllability. Herein, we report an aggregation-induced emission luminogen TPE-2MO2NT that undergoes oxidation cleavage upon light irradiation accompanied by tunable from orange blue time-dependence. The photocleavage mechanism revealed self-generation reactive oxidants driving catalyst-free oxidative process. A comprehensive analysis other comparative molecules demonstrates molecular scaffold can be easily modified extended. Further, microenvironmental controllability photoreaction polymer matrices enables fabrication fluorescence images 4D information codes, providing strategies advanced controllable encryption.

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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Light‐Driven Reversible Multicolor Supramolecular Shuttle

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(52)

Published: Nov. 16, 2023

Light-driven multicolor supramolecular systems mainly rely on the doping of dyes or a photo-reaction to produce unidirectional luminescence. Herein, we use visible light drive bidirectional reversible shuttle from blue green, white, yellow, up orange by simple encapsulation spiropyran-modified cyanostilbene (BCNMC) macrocyclic cucurbit[8]uril (CB[8]) monomer. The resultant host-guest complex displayed enhanced fluorescence properties, i.e. changed in dark within 2 hours and reverted original state upon irradiation for 30 s. Benefiting sensitivity spiropyran moiety light, it can spontaneously isomerize ring-opened ring-closed isomer aqueous solution, this photo-isomerization reaction is process under irradiation, leading luminescence as result intramolecular energy transfer. In addition, also drove conversion topological morphology two-dimensional nanoplatelets nanospheres. Different widely reported molecular rotaxane "shuttle", confined host CB[8] not only modulated but exhibited luminescence, which was successfully applied programmed rewritable information encryption.

Language: Английский

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Organic Chameleon: Fluorescence, Phosphorescence and Radical Afterglow Triple Emission from Naphthylimide Functionalized Triphenylphosphine Derivatives

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(21)

Published: Jan. 29, 2024

Abstract Organic radical luminescent materials have attracted worldwide attention because of their absolute spin‐allowed radiative transition and sensitivity to the environment, which give it multiple stimulus response properties. Nowadays, how regulate utilize radicals has become a hot difficult issue. Here, arylphosphonium bromide salts are introduced into molecular backbone naphthimide ( NMI ) using an intramolecular counterion strategy, prepared novel multifunctional stabilized luminescent: TPP‐ o ‐3OMe‐NMI‐Br . Interestingly, this molecule exhibits different assembly modes in solvents, resulting generation two crystals with fluorescence (green: G‐C; orange–yellow: Y‐C), Y‐C crystalline powder excellent stabilization properties for doublet triplet excitons, induce emission orange–yellow afterglow, multi‐stimuli responsiveness external pressure (P), temperature (T) water (W). Moreover, interesting time‐dependent photoactivated colorful afterglow can be observed ‐3OMe‐NMI‐Br@PMMA films doping ratios exhibit multi‐color tunability, responses, data encryption, optical information erase/write behavior. This study not only broadens types applications organic long but also provides new ideas designing “chameleon” field smart luminescence materials.

Language: Английский

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Water-sensitive fluorescent microgel inks to produce verifiable information for highly secured anti-counterfeiting

Materials Horizons, Journal Year: 2024, Volume and Issue: 11(12), P. 2856 - 2864

Published: Jan. 1, 2024

The printable multicolor microgels exhibit excellent discoloration behavior and can act as fluorescent anti-counterfeiting inks, which are ascribed to the water-responsive FRET effect changes in aggregation state of dyes.

Language: Английский

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Polymer Free Volume‐Controlled Molecular Clock and Emitter for Multicolored Transient Data Display in Advanced Photonic Cryptography

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(38)

Published: June 26, 2024

The booming demand on data security has aroused great interest for developing smart materials with temporal display feature and dynamic multicolor fluorescence. However, it remains challenging to implement both features most responsive molecules. Herein, we construct a polymer free volume-controlled "molecular clock emitter" via covalently embedding multi-stimuli molecular switch (i.e., spiropyran) into network poly(pentafluorophenyl acrylate)) programmable crosslink density volume. By the aminolysis of pentafluorophenyl ester different amount diamine crosslinkers, pPFPA-co-SP networks controllable densities are generated, which have confinement effects rate constant SP/MC isomerization, thus leading time-dependent photochromism. In addition, PTF1, fluorescent probe that is sensitive rigidity, introduced further endow system phototunable full-color emission. Therefore, relying their synergistical responses rigidity network, successfully developed versatile emitter an "one stone two birds" manner, shows along fluorescence switching, providing potential advanced encryption anticounterfeiting high level.

Language: Английский

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