Achieving Stimuli-Responsive Amorphous Organic Afterglow in Single-Component Copolymer through Self-Doping

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(13), P. 7343 - 7351

Published: March 10, 2023

The development of stimuli-responsive materials with afterglow emission is highly desirable but remains a formidable challenge in single-component material system. Herein, we propose strategy to achieve photoactivated variety amorphous copolymers through self-doping, endowed by the synergetic effect self-host-induced guest sensitization and thermal-processed polymer rigidification for boosting generation stabilization triplet excitons. Upon continuous ultraviolet illumination regulating oxygen concentration, showing increased lifetimes from 0.34 867.4 ms realized. These emissions can be naturally or quickly deactivated pristine state under ambient conditions heating treatment. Interestingly, programmable reusable patterns, conceptual pulse-width indicators, "excitation-time lock" Morse code are successfully established using polymers as recorded media. findings offer an avenue construct polymeric system organic features demonstrate superiority remarkable applications.

Language: Английский

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Full-color persistent room temperature phosphorescent elastomers with robust optical properties

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

Published: Aug. 10, 2023

Abstract Persistent room temperature phosphorescent materials with unique mechanical properties and robust optical have great potential in flexible electronics photonics. However, developing such remains a formidable challenge. Here, we present highly stretchable, lightweight, multicolored persistent luminescence elastomers, produced by incorporating ionic polymers polyvinyl alcohol into polydimethylsiloxane matrix. These prepared elastomers exhibit high transparency daylight emit bright after the removal of 365 nm excitation. The homogeneous distribution within matrix has been confirmed confocal fluorescence microscopy, scanning electron atomic force microscopy. Mechanical property investigations revealed that possess satisfactory stretchability. Impressively, these maintain even under extensive repeated deformations, characteristic previously unprecedented. fantastic features make ideal candidates for applications wearable devices, displays, anti-counterfeiting.

Language: Английский

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Functional Roles of Polymers in Room‐Temperature Phosphorescent Materials: Modulation of Intersystem Crossing, Air Sensitivity and Biological Activity

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(12)

Published: Jan. 31, 2023

Organic room-temperature phosphorescent (RTP) materials routinely incorporate polymeric components, which usually act as non-functional or "inert" media to protect excited-state phosphors from thermal and collisional quenching, but are lesser explored for other influences. Here, we report some exemplary "active roles" of polymer matrices played in organic RTP materials, including: 1) color modulation total delayed emissions via balancing the population ratio between thermally-activated fluorescence (TADF) due dielectric-dependent intersystem crossing; 2) altered air sensitivity by generating various surface morphologies such nano-sized granules; 3) enhanced bacterial elimination electrostatic interactions with negatively charged bio-membranes. These active roles demonstrated that vast library structures functionalities can be married broaden new application horizons materials.

Language: Английский

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Purely Organic Fluorescence Afterglow: Visible‐Light‐Excitation, Inherent Mechanism, Tunable Color, and Practical Applications with Very Low Cost

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(30)

Published: May 27, 2023

Purely organic materials with visible light excitable fluorescence afterglow are promising for applications. Herein, various intensity and duration was observed on fluorescent dyes once being dispersed in polymer matrix, thanks to the slow reverse intersystem crossing rate (kRISC ) long delayed lifetime (τDF derived from coplanar rigid chemical structure of dyes. To verify mechanism, different polymers were used tune singlet-triplet splitting energy based solvent effect. And commercial acriflavine (Acf) film showed blue shifted compared purified one, slower kRISC (≈100 s-1 longer τDF (0.6 s). Via transfer Acf rhodamine B, color further regulated, largest quantum yield 42.4 %. It demonstrated that worked tunable sources, low-cost ($2 50 000 labels) anti-counterfeit labels recognized by white light.

Language: Английский

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Multicolor Afterglow Carbon Dots: Luminescence Regulation, Preparation, and Application

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(25)

Published: Feb. 6, 2024

Abstract Afterglow materials have attracted much attention owing to their long luminescence lifetimes, large Stokes shifts, and emission without real‐time excitation. Compared with traditional organic afterglow materials, carbon dots (CDs), as a new material, superior properties such easy preparation, low toxicity, cost. The color of CDs can be regulated by external factors excitation wavelength, temperature, time, which is highly significant for expanding the diversified applications make them available biotechnology information applications. This review summarizes research progress multicolor in recent years, including regulation strategies, preparation methods, First, are classified into three strategies: room temperature phosphorescence (RTP), thermally activated delayed fluorescence converted RTP, based on Förster resonance energy transfer, strategies regulating analyzed. Second, methods achieving summarized both matrix‐free matrix‐confined aspects. Then, anticounterfeiting encryption, sensing bioimaging introduced detail. Finally, future challenges opportunities prospected provide ideas controlled design wide application.

Language: Английский

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Multi‐stimulus Room Temperature Phosphorescent Polymers Sensitive to Light and Acid cyclically with Energy Transfer

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(44)

Published: Aug. 19, 2023

Abstract The stimulus‐responsive room temperature phosphorescent (RTP) materials have endowed wide potential applications. In this work, by introducing naphthalene and spiropyran (SP) into polyacrylamide as the energy donor acceptor respectively, a new kind of brilliant dynamic color‐tunable amorphous copolymers were prepared with good stability processibility, afterglow emissions from green to orange in response stimulus photo or acid, thanks multi‐responsibility SP transfer between SP. addition deeply exploring inherent mechanism, these been successfully applied dynamically controllable applications information protection delivery.

Language: Английский

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Advances in Polymer‐Based Organic Room‐Temperature Phosphorescence Materials

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(23)

Published: Jan. 28, 2024

Abstract Organic room‐temperature phosphorescence (RTP) materials are actively explored as attractive candidates for optoelectronic and bioelectronics applications given their unique long‐lived excited‐state features inherent merits of low‐cost, appreciable functionality, good biocompatibility. In recent years, many efforts in molecular design aggregation modulation devoted to achiev efficient RTP from organics, among which an emerging strategy focuses on confining chromophores within polymer matrices. Polymers possess intertwined chains making them a platform restrain the nonradiative decays quenching, allowing triplet excitons survive long time enough emission at room temperature. Progress relating polymer‐based organic is highlighted new creative subject field. This review outlines advancements materials. The fundamental mechanism first presented. Thereafter, considerations strategies construct summarized detail. Several promising progresses proposed use these materials, such encryption anti‐counterfeiting, sensors, bioimaging overviewed. Finally, challenges future perspectives discussed emphasize directions that deserve focus attention

Language: Английский

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Enabling Highly Robust Full‐Color Ultralong Room‐Temperature Phosphorescence and Stable White Organic Afterglow from Polycyclic Aromatic Hydrocarbons

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(10)

Published: Jan. 19, 2024

Abstract In this work, full‐color and stable white organic afterglow materials with outstanding water, solvents, temperature resistances have been developed for the first time by embedding selected polycyclic aromatic hydrocarbons into melamine‐formaldehyde polymer via solution polymerization. The quantum yields lifetimes of resulting films were up to 22.7 % 4.83 s, respectively, under ambient conditions. For coronene‐doped sample, its color could be linearly tuned between yellow blue adjusting temperature, it still emit an intense a lifetime 0.68 s at 440 K. Moreover, showed bright 370 K 2.80 maintained excellent performance after soaking in water solvents more than 150 days. addition, application potential information encryption anti‐counterfeiting was also demonstrated.

Language: Английский

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Full-color, time-valve controllable and Janus-type long-persistent luminescence from all-inorganic halide perovskites

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

Published: June 20, 2024

Abstract Long persistent luminescence (LPL) has gained considerable attention for the applications in decoration, emergency signage, information encryption and biomedicine. However, recently developed LPL materials – encompassing inorganics, organics inorganic-organic hybrids often display monochromatic afterglow with limited functionality. Furthermore, triplet exciton-based phosphors are prone to thermal quenching, significantly restricting their high emission efficiency. Here, we show a straightforward wet-chemistry approach fabricating multimode by introducing both anion (Br − ) cation (Sn 2+ doping into hexagonal CsCdCl 3 all-inorganic perovskites. This process involves establishing new trapping centers from [CdCl 6-n Br n ] 4− and/or [Sn 2-n Cd Cl 9 5− linker units, disrupting local symmetry host framework. These halide perovskites demonstrate duration time ( > 2,000 s), nearly full-color coverage, photoluminescence quantum yield ~ 84.47%), anti-thermal quenching temperature up 377 K. Particularly, : x %Br temperature-dependent time-valve controllable time-dependent luminescence, while %Sn exhibit forward reverse excitation-dependent Janus-type luminescence. Combining experimental computational studies, this finding not only introduces local-symmetry breaking strategy simultaneously enhancing lifetime efficiency, but also provides insights dynamic tunability photonics, high-security anti-counterfeiting storage.

Language: Английский

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Sunlight‐Activated Hour‐Long Afterglow from Transparent and Flexible Polymers

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(16)

Published: Jan. 28, 2024

Abstract Afterglow materials featuring long emission durations ranging from milliseconds to hours have garnered increasing interest owing their potential applications in sensing, bioimaging, and anti‐counterfeiting. Unfortunately, polymeric rarely exhibit afterglow properties under ambient conditions because of the rapid nonradiative decay rate triplet excitons. In this study, hour‐long (HLA) polymer films are fabricated using a facile molecular doping strategy. Flexible transparent emitted bright lasting over 11 h at room temperature air, which is one best performances among organic reported date. Intriguingly, HLA can be activated by sunlight, cyan air readily observed naked eye. Moreover, color could tuned red through Förster resonance energy transfer mechanism. Their application flexible displays information storage has also been demonstrated. With remarkable advantages, including an afterglow, tunable colors, superior flexibility transparency, ease fabrication, paves way for practical engineering sector.

Language: Английский

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