Hydrothermal Synthesis of Zinc‐Doped Silica Nanospheres Simultaneously Featuring Stable Fluorescence and Long‐Lived Room‐Temperature Phosphorescence
| Autor: | Jingyang Wang, Guyue Hu, Yao He, Rong Sun, Xin Jiang, Zhaojian Xu, Jinhua Wang, Runzhi Chen, Bin Song, Junfei Han, Mingyue Cui, Manjing Li |
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| Rok vydání: | 2021 |
| Předmět: |
Aqueous solution
Materials science Silicon 010405 organic chemistry Doping Quantum yield chemistry.chemical_element General Medicine General Chemistry 010402 general chemistry Photochemistry 01 natural sciences Fluorescence Catalysis 0104 chemical sciences Nanomaterials chemistry Hydrothermal synthesis Phosphorescence |
| Zdroj: | Angewandte Chemie International Edition. 60:15490-15496 |
| ISSN: | 1521-3773 1433-7851 |
| DOI: | 10.1002/anie.202103200 |
| Popis: | Fluorescence and phosphorescence are known as two kinds of fundamental optical signals, which have been used for myriad applications. Of particular note, simultaneous activation of stable fluorescence and long-lived room temperature phosphorescence (RTP) emission in aqueous phase remains a big challenge up to present. Herein, we prepare a kind of zinc-doped silica nanospheres (Zn@SiNSs) with fluorescence and RTP properties through a facile hydrothermal synthetic strategy. For the as-prepared Zn@SiNSs, the recombination of electrons and holes in defects and defect-stabilized excitons derived from oxygen vacancy/C=N bonds lead to the production of stable fluorescence and long-lived RTP (emission lasting for ~9 s, quantum yield (QY): ~33.6%, RTP lifetime: ~236 ms). In addition, the internal Si-O bonded networks and hydrophilic surface in Zn@SiNSs can reduce nonradiative decay to form self-protective RTP, and also provide high water solubility, excellent pH- and photo-stability. |
| Databáze: | OpenAIRE |
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