水性长寿命绿色磷光碳点，用于防伪和加密

IF 4.7 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-09-20 DOI:10.1016/j.jphotochem.2025.116798

Yanni Jie , Ting Meng , Zengbo Fan , Fuchun Li , Jiang Yan , Penggao Dai

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引用次数: 0

摘要

长寿命室温磷光（RTP）碳点（cd）在实现水相稳定性和颜色可调发射方面面临挑战。本文报道了采用熔盐法制备具有优异RTP性能的壳聚糖衍生碳点（CTS-CDs）。CTS-CDs表现出长寿命的绿磷光，寿命达1.07 s，光致发光量子产率（PLQY）为13.4%。值得注意的是，CTS-CDs即使在水溶液中也能保持绿色磷光，保持了361 ms的RTP寿命。结构分析表明，刚性MgO基体和N、P、Mg元素的共掺杂通过减少非辐射衰变途径提高了RTP的性能和稳定性。这项研究突出了cts - cd作为环保、稳定、高效的安全信息显示材料的潜力，为开发下一代RTP材料提供了一种新的方法，可用于广泛的实际应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Long-lived green phosphorescent carbon dots in aqueous solution for anti-counterfeiting and encryption

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Long-lived green phosphorescent carbon dots in aqueous solution for anti-counterfeiting and encryption

Long-lived room-temperature phosphorescence (RTP) carbon dots (CDs) face challenges in achieving aqueous-phase stability and color-tunable emission. Herein, we report the chitosan-derived carbon dots (CTS-CDs) with outstanding RTP properties prepared via molten salt method. The CTS-CDs exhibit long-lived green phosphorescence with lifetime up to 1.07 s and photoluminescence quantum yield (PLQY) of 13.4 %. Notably, CTS-CDs retain green phosphorescence even in aqueous solution, maintaining RTP lifetime of 361 ms. Structural analyses reveal that the rigid MgO matrix and co-doping of N, P, and Mg elements improves the RTP performance and stability by reducing non-radiative decay pathways. This research highlights the potential of CTS-CDs as eco-friendly, stable, and highly effective materials for secure information display, offering a new approach to developing next-generation RTP materials for a wide range of practical applications.

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来源期刊

Journal of Photochemistry and Photobiology A-chemistry 化学-物理化学

CiteScore

7.90

自引率

7.00%

发文量

580

审稿时长

48 days

期刊介绍： JPPA publishes the results of fundamental studies on all aspects of chemical phenomena induced by interactions between light and molecules/matter of all kinds. All systems capable of being described at the molecular or integrated multimolecular level are appropriate for the journal. This includes all molecular chemical species as well as biomolecular, supramolecular, polymer and other macromolecular systems, as well as solid state photochemistry. In addition, the journal publishes studies of semiconductor and other photoactive organic and inorganic materials, photocatalysis (organic, inorganic, supramolecular and superconductor). The scope includes condensed and gas phase photochemistry, as well as synchrotron radiation chemistry. A broad range of processes and techniques in photochemistry are covered such as light induced energy, electron and proton transfer; nonlinear photochemical behavior; mechanistic investigation of photochemical reactions and identification of the products of photochemical reactions; quantum yield determinations and measurements of rate constants for primary and secondary photochemical processes; steady-state and time-resolved emission, ultrafast spectroscopic methods, single molecule spectroscopy, time resolved X-ray diffraction, luminescence microscopy, and scattering spectroscopy applied to photochemistry. Papers in emerging and applied areas such as luminescent sensors, electroluminescence, solar energy conversion, atmospheric photochemistry, environmental remediation, and related photocatalytic chemistry are also welcome.