Development of strontium aluminate embedded photochromic cellulose hydrogel for mapping of fingermarks

Inorganic Chemistry Communications, Journal Year: 2023, Volume and Issue: 152, P. 110669 - 110669

Published: April 1, 2023

Language: Английский

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Thermally Activated Photochromism: Realizing Temperature‐Gated Triphenylethylene Photochromic Materials

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(24)

Published: Feb. 21, 2024

Abstract Photochromic materials have drawn enormous attention for their potential applications in optical memory storage and photoswitchable molecular devices. Although great achievements photochromic been fulfilled, it is still a big challenge to realize gated photochromism ready tunable properties. In previous studies, rare examples of are reported. Herein, three triarylethylene derivatives FTrPE‐ o I, ClTrPE‐ I BrTrPE‐ with reversible thermally activated characteristics designed synthesized, whose crystalline powders show no until treatments relative temperature. Temperature acts as gate switch the properties by switching aggregation state from melted amorphous. With this progress, broader structural realm becomes accessible materials, which can now be synthetically tailored advanced future applications, e.g., research on machines switches, studies photoisomerization mechanisms, or generation thermal tracing materials. To showcase these distinct encrypted printing, trace monitoring well multi‐level anticounterfeiting demonstrated, addition comprehensive photochemical study all compounds.

Language: Английский

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Photo-responsive electrospun polymer nanofibers: Mechanisms, properties, and applications

Progress in Materials Science, Journal Year: 2024, Volume and Issue: 146, P. 101312 - 101312

Published: May 18, 2024

Language: Английский

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Preparation of polylactic acid reinforced with cellulose nanofibers toward photochromic self-healing adhesive for anti-counterfeiting applications

International Journal of Biological Macromolecules, Journal Year: 2023, Volume and Issue: 259, P. 129065 - 129065

Published: Dec. 29, 2023

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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Preparation of cellulose nanocrystal-reinforced alginate hydrogel to optimize fluorescence and persistent emission of self-healable adhesive to combat counterfeiting

Journal of Molecular Liquids, Journal Year: 2024, Volume and Issue: 401, P. 124590 - 124590

Published: March 28, 2024

Language: Английский

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Solid-State Photoswitching of Hydrazones Based on Excited-State Intramolecular Proton Transfer

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 8, 2025

The development of new photochromic systems is motivated by the possibility controlling properties and functions materials with high spatial temporal resolution in a reversible manner. While there are several classes photoswitches operating solution, design efficiently solid state remains highly challenging, mainly due to limitations related confinement effects. Triaryl-hydrazones represent relatively subclass bistable hydrazone exhibiting efficient Z/E photochromism solution. As "large volume" photoswitches, they have been anticipated display only limited solid-state photoswitching. Here, we show that Z isomers newly prepared triaryl-hydrazones containing perfluorinated hydrazine phenyl ring (PHZs) exhibit impressive an unexpected light-induced red-shift absorption maximum. Based on (time-dependent) density functional theory calculations, photoswitching reaction mechanism involving excited intramolecular proton transfer has proposed, which rationalizes observed formation metastable structure. Advanced experimental techniques including X-ray diffraction, NMR EPR spectroscopy, confocal Raman microscopy corroborated suggested revealed superficial phenomenon. This atypical behavior PHZs can also be realized using visible light form thin films, manifests their potential use optics optoelectronics.

Language: Английский

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Efficient manipulation of Förster resonance energy transfer through host–guest interaction enables tunable white-light emission and devices in heterotopic bisnanohoops

Chemical Science, Journal Year: 2023, Volume and Issue: 14(40), P. 11121 - 11130

Published: Jan. 1, 2023

In this study, we synthesized and reported the heterotopic bisnanohoops P5-[8,10]CPPs containing cycloparaphenylenes (CPPs) a pillar[5]arene unit, which act not only as energy donors but also host for binding acceptors. We demonstrated that series of elegant FRET systems could be constructed successfully through self-assembly between acceptors with different emissions via host-guest interaction. These further allow us to finely adjust (BODIPY-Br Rh-Br) achieving multiple color-tunable emissions, particularly white-light emission. More importantly, these complexes were utilized in fabrication fluorescent films integrated 365 nm LED lamp create white devices. The findings highlight new application carbon nanorings emission materials, beyond common recognition π-conjugated molecules.

Language: Английский

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A wet bacterial cellulose film self-anchored by phosphotungstic acid: Flexible, quick-response and stable cycling performance for photochromic application

Materials & Design, Journal Year: 2024, Volume and Issue: 238, P. 112613 - 112613

Published: Jan. 6, 2024

Bacterial cellulose (BC) has been recognized as an ideal supporter owning to its abundant hydroxyl groups on the surface. In this work, Keggin-type phosphotungstic acid (H3PW12O40, PWA) is self-anchored three-dimensional network of BC by a simple diffusion method at room-temperature. fibers can protect well-dispersed PWA with high transparency, mechanical strength, and stability. When PWA/BC serves photochromic material, coloration time bleaching are only 3 min 30 respectively. After 6 cycles, ability composite film almost unchanged. At same time, we convert degree into quantitative data including color difference calculation ΔE2000 remaining (RC%). Within system, exhibits special linear relationship between RC% (0–30 min). The processes reduction (W6+→W5+) oxidation (W5+→W6+) analysed photo-electrochromic, XPS ESR characterizations. revealed excellent properties soft films highlight their potential photoresponsive materials.

Language: Английский

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Photoluminescent polypropylene nanofiber-supported polyethylene terephthalate integrated with strontium aluminate phosphor

Journal of Photochemistry and Photobiology A Chemistry, Journal Year: 2024, Volume and Issue: 453, P. 115675 - 115675

Published: April 13, 2024

Language: Английский

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