掺杂剂
磷光
基质(水族馆)
单独一对
光化学
材料科学
化学
激子
纳米技术
光电子学
兴奋剂
分子
荧光
有机化学
光学
物理
地质学
海洋学
量子力学
作者
Liang Zhang,Meiying Wu,Zeming Wang,Huazhang Guo,Liang Wang,Minghong Wu
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2021-11-24
卷期号:9 (48): 16262-16269
被引量:44
标识
DOI:10.1021/acssuschemeng.1c05525
摘要
Exploiting a precise and reproducible phosphorescence tuning strategy is crucial to tailor-design carbon dots (CDs) for premium gradient anticounterfeiting applications. Toward this target, we designed a facile substrate engineering technique to manipulate the phosphorescence of F, O-codoped CDs. Applying phenolic compounds with different numbers of hydroxyl groups as precursors, the contents of the C–O–C groups in CDs are effectively regulated for gaining outstanding phosphorescence performance as well as the introduction of the F-dopant. After excitation using a UV lamp followed by turning it off, the CDs/polyvinyl alcohol matrix can emit bright yellow room-temperature phosphorescence, which may derive from the synergistic effect of C–F and C–O–C in F and O-codoped CDs. After O and F form a bond, many lone pairs of electrons are generated, which is conducive to the excitation of n → π* and promotes the supplementation of triplet excitons. The phosphorescence tuning of CDs is realized by mixing different substrates, which can provide various phosphorescence lifetimes and colors. Discovering the unique properties, F, O-codoped CDs/substrates can be applied in gradient anticounterfeiting applications. This substrate engineering technique, showing unique and reproducibility with high efficiency, may further facilitate the potential applications of CDs.
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