Dual Doping with Nitrogen and Rare Earth Metals for Tailored Photoluminescence and Antimicrobial Properties in Hydrothermally Synthesized Carbon Dots

Surfaces and Interfaces, Journal Year: 2025, Volume and Issue: unknown, P. 105752 - 105752

Published: Jan. 1, 2025

Language: Английский

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Preparation of Multicolor Room-Temperature Phosphorescence Carbon Dots by Changing the Conjugation Degree of Precursors for Information Encryption

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: 17(9), P. 14425 - 14432

Published: Feb. 20, 2025

Room temperature phosphorescence (RTP) materials have attracted considerable attention, because of their outstanding properties and a wide array potential applications. However, achieving control over the emission color RTP still presents certain challenges. In this article, carbon dots (CDs) three distinct colors were synthesized through simple host-guest doping strategy. Blue CDs (B-CDs) obtained by using phenylboronic acid as guest phosphors B2O3 host protect matrix, an ultralong lifetime (up to 1.597 s). Under 254 nm light excitation, blue for 14 s B-CDs can be visually observed. By increasing conjugation degree precursor molecules introducing 4-(1-naphthyl) naphthalene-1-boronic pyren-1-ylboronic phosphors, green (G-CDs) red (R-CDs) obtained, respectively. Theoretical calculations band gap analyses suggest that larger conjugated structures reduce HOMO-LUMO energy level difference, thereby causing redshift in wavelength. Last, these multicolor composite applied information encryption.

Language: Английский

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Ultra-stable and colorful persistent organic phosphorescence of host-guest composites under solution, UV irradiation, and high temperature

Microchemical Journal, Journal Year: 2025, Volume and Issue: unknown, P. 113505 - 113505

Published: April 1, 2025

Language: Английский

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Dimeric Lipids Enable Ph-Switchable Supramolecular Tuning in Surface-Engineered Quantum Dots

Published: Jan. 1, 2025

Language: Английский

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Aqueous/Chemical‐Resistant Organic Room Temperature Phosphorescence Materials From Siloxane Network Reinforcement

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

Published: April 28, 2025

Abstract Organic room‐temperature phosphorescent(RTP) materials typically exhibit superior luminescent properties, yet their instability, particularly in aqueous environments where phosphorescence is quenched, and under acidic, alkaline, or organic solvent conditions, restricts application. Herein, a novel convenient strategy designed for constructing host–guest RTP by incorporating silane into urea‐derived products to form siloxane network‐strengthened stable host matrix. The possesses excellent chemical stability can be combined with the thermolytic of urea through covalent bonds, enhancing resistance host. connects guest molecules bonds hydrogen restricting non‐radiative loss, phosphorescent emission, protecting from quenching multiple environments. material, prepared using (3‐aminopropyl) triethoxysilane, urea, 2‐aminoterephthalic acid, exhibits blue lifetime 891 ms, visible naked eye 21 s. Notably, it maintains emission water, solvents, strong acid/alkali solutions while demonstrating stability, as evidenced its potential applications afterglow displays information encryption. This provides valuable insights designing broadens application complex

Language: Английский

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Piperidine and isobutyl-nitrite fuels for the combustion synthesis of nanomaterials: A study of crystal structure, microstructure, thermodynamics, and optical properties

Journal of Molecular Structure, Journal Year: 2024, Volume and Issue: 1312, P. 138583 - 138583

Published: May 10, 2024

Language: Английский

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Achieving Seconds‐to‐Hours Duration‐Tunable Organic Long Persistent Luminescence from Carbon Dots‐Based Exciplex Systems by Energy Gaps Regulation^†

Chinese Journal of Chemistry, Journal Year: 2024, Volume and Issue: 42(12), P. 1407 - 1417

Published: March 13, 2024

Comprehensive Summary Duration‐tunable afterglow materials have garnered considerable attention in various applications. Herein, carbon dots (CDs)‐based long persistent luminescence (LPL) composites with a tunable duration an ultrawide range of seconds‐to‐hours levels were designed and prepared for the first time. In contrast to established CD‐based materials, we reported that exhibit LPL form exciplexes long‐lived charge‐separated states, enabling be prolonged from several seconds over one hour, exceeding typical regulation (limited 1 min). Further studies revealed relationship between excited charge‐transfer states CDs plays pivotal role activating regulating its duration. Furthermore, these exhibited high photoluminescence (PL) quantum yields up 60.63%, their was robust under ambient conditions, even aqueous media. Their superior performance endows strong competitive advantage dynamic display systems, such as tags time‐resolved data encryption displays remaining time takeaways. This study offers approach preparing CDs‐based durations may provide new insights development rare‐earth‐free materials.

Language: Английский

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Regulation of molecular conjugation to realize mult-color room temperature phosphorescence of carbon dots in urea and ammonium pentaborate precursor matrices

Materials Today Chemistry, Journal Year: 2024, Volume and Issue: 40, P. 102199 - 102199

Published: July 16, 2024

Language: Английский

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Rapid Realization of Multicolor Room Temperature Phosphorescence of Carbon Dot-Based Composites on Natural Polymer Matrix Platforms

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(7), P. 7720 - 7730

Published: April 1, 2024

Multicolor room temperature phosphorescence (RTP) carbon dots (CDs) have great application potential in the field of information security encryption, but rapidly realizing multicolor RTP (including long-wavelength RTP) based on natural polymer matrices still has certain challenges. In this work, we reported for first time that CD-based composites were composed two kinds CDs with different fluorescence (blue and red) synthesized by a microwave solid-phase reaction method matrixes, carboxymethyl starch sodium (CMSNa) chitosan (CMCS), achieved red, orange, yellow, green emission lifetimes 314, 264, 311, 312 ms, respectively. preparation process, synthesis CMSNa CMCS matrixes are very simple fast. particular, matrix materials can be completed within 5 min. A series characterizations analyses show formation strong hydrogen bond networks strengths promotes CDs. The fluorescent four composite security.

Language: Английский

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Recent progress on exciplex-based organic long-persistence luminescent materials

Chinese Science Bulletin (Chinese Version), Journal Year: 2024, Volume and Issue: 69(26), P. 3849 - 3863

Published: June 25, 2024

纯有机长余辉材料具有分子结构/功能可调、易加工、不含重金属元素、生物相容性好、可大面积应用以及柔性等优点,在数据加密、生物成像、安全打印等领域得到了广泛的应用,是目前有机光电子学研究的热点之一。基于给体-受体构建的激基复合物长余辉材料具有发光持续时间长、制备简便以及性能可调等优点,成为设计、开发有机长余辉材料的新选择,近年来受到了人们的广泛关注。本文系统地综述了给-受体激基复合物长余辉材料的基本设计理念,并依据受体材料的不同,详细总结了各类高效、稳定的激基复合物长余辉材料体系,探讨了给体和受体分子间的相互作用对其发光持续时间的影响及其结构与性能的关系,总结了激基复合物有机长余辉材料存在的问题,并对其未来发展所面临的挑战和机遇进行了展望。

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