Recent advances in the design of afterglow materials: mechanisms, structural regulation strategies and applications

Chemical Society Reviews, Год журнала: 2023, Номер 52(22), С. 8005 - 8058

Опубликована: Янв. 1, 2023

Afterglow materials have attracted widespread attention owing to their distinctive and long-lived optical emission properties which create exciting opportunities in various fields.

Язык: Английский

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Room-temperature phosphorescent materials derived from natural resources

Nature Reviews Chemistry, Год журнала: 2023, Номер 7(11), С. 800 - 812

Опубликована: Сен. 25, 2023

Язык: Английский

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

Advanced Functional Materials, Год журнала: 2024, Номер 34(25)

Опубликована: Фев. 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.

Язык: Английский

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Tailored Fabrication of Full‐Color Ultrastable Room‐Temperature Phosphorescence Carbon Dots Composites with Unexpected Thermally Activated Delayed Fluorescence

Advanced Materials, Год журнала: 2024, Номер 36(27)

Опубликована: Апрель 23, 2024

Abstract The development of single‐system materials that exhibit both multicolor room‐temperature phosphorescence (RTP) and thermally activated delayed fluorescence (TADF) with tunable after glow colors channels is challenging. In this study, four metal‐free carbon dots (CDs) are developed through structural tailoring, panchromatic high‐brightness RTP achieved via strong chemical encapsulation in urea. maximum lifetime quantum yield reaches 2141 ms 56.55%, respectively. Moreover, CDs‐IV@urea, prepared coreshell interaction engineering, exhibits a dual afterglow red green TADF. degree conjugation functional groups precursors affects the binding interactions nitrogen cladding on CDs, which turn stabilizes triplet energy levels gap between S 1 T (Δ E ST ) to induce RTP. enhanced wrapping lowers Δ , promoting reverse intersystem crossing, leads This fully state, thus stabilizing material water, even extreme environments such as acids oxidants. These tested multicolor, time, temperature multiencryption well vivo bioimaging. Hence, these have promising practical applications information security biomedical diagnosis treatment.

Язык: Английский

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Recent advancements of solid-state emissive carbon dots: A review

Coordination Chemistry Reviews, Год журнала: 2023, Номер 498, С. 215469 - 215469

Опубликована: Сен. 29, 2023

Язык: Английский

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Doped Carbon Dots Enable Highly Efficient Multiple‐Color Room Temperature Phosphorescence

Advanced Optical Materials, Год журнала: 2023, Номер 12(7)

Опубликована: Окт. 26, 2023

Abstract Colloidal carbon dots (C‐dots) are considered as promising heavy‐metal‐free materials to achieve room‐temperature phosphorescence (RTP) properties for applications, such photoelectronic devices, information encryption, and bio‐imaging. However, most of the current obtained RTP C‐dots have a short lifetime with relatively low quantum yield (QY). In this work, large‐scale synthesized via vacuum heating approach multiple emissions (blue, green, yellow), long high 1.92 s, QY 34.4% by selecting different types precursors, which is superior reported C‐dots. The atoms doping strong bonding between neighbored promoted contributes excellent properties. As proof‐of‐concept, as‐obtained used optical ink flexible security codes, exhibiting bright shape 1.37 s. This work offers an efficient producing high‐quality C‐dots, can be applied anti‐counterfeiting encryption systems.

Язык: Английский

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Phosphorescent carbon dots: Intermolecular interactions, properties, and applications

Coordination Chemistry Reviews, Год журнала: 2024, Номер 503, С. 215642 - 215642

Опубликована: Янв. 2, 2024

Язык: Английский

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Achieving Bright and Long‐Lived Aqueous Room‐Temperature Phosphorescence of Carbon Nitrogen Dots Through In Situ Host–Guest Binding

Advanced Materials, Год журнала: 2024, Номер 36(24)

Опубликована: Фев. 29, 2024

Abstract The development of bright and long‐lived aqueous room‐temperature phosphorescent (RTP) materials holds paramount importance in broadening the application scope RTP material system. However, conventional usually exhibit low efficiency short lifetime solution. Herein, an situ host–guest strategy is proposed to achieve cyanuric acid (CA)‐derived carbon nitrogen dots (CNDs) composite (CNDs@CA) that demonstrates a significant enhancement both quantum yield (QY) mediated by water. Detailed investigations reveal robust hydrogen bonding networks between CNDs@CA water effectively stabilize triplet excitons suppress nonradiative decays, as well facilitate efficient energy transfer from CA CNDs, thereby prolonging enhancing RTP. QY can be increased 26.89% (3.9‐fold increase) 951.25 ms (5.5‐fold increase), respectively, with incorporation 50 wt% under ambient conditions. Even fully environments (with up 400 added), exhibits persistent water‐boosted properties, demonstrating exceptional stability. property solutions presents potential for high signal‐to‐noise ratio afterglow bioimaging advanced information encryption.

Язык: Английский

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Carbon dot-based afterglow composite with tunable room temperature phosphorescence and thermally activated delayed fluorescence and their anti-counterfeiting and encryption application

Chemical Engineering Journal, Год журнала: 2024, Номер 489, С. 151245 - 151245

Опубликована: Апрель 15, 2024

Язык: Английский

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Continuous tuning of persistent luminescence wavelength by intermediate-phase engineering in inorganic crystals

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Авг. 9, 2024

Multicolor tuning of persistent luminescence has been extensively studied by deliberately integrating various luminescent units, known as activators or chromophores, into certain host compounds. However, it remains a formidable challenge to fine-tune the spectra either in organic materials, such small molecules, polymers, metal-organic complexes and carbon dots, doped inorganic crystals. Herein, we present strategy delicately control wavelength engineering sub-bandgap donor-acceptor states series single-phase Ca(Sr)ZnOS The emission peak can be quasi-linearly tuned across broad range (500-630 nm) function Sr/Ca ratio, achieving precision down ~5 nm. Theoretical calculations reveal that fine-tuning stems from constantly lowered donor levels accompanying modified band structure Sr alloying. Besides, our experimental results show these crystals exhibit high initial luminance 5.36 cd m

Язык: Английский

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