期刊
NANO LETTERS
卷 -, 期 -, 页码 -出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.2c00603
关键词
carbon dots; room-temperature phosphorescence; hydroxy Fluorides; stability; information security
类别
资金
- National Natural Science Foundation of China [52172142, 12174119, 52073242]
- Guangdong Basic and Applied Basic Research Foundation [2020A1515011210, 2022A1515011958]
- Science and Technology Planning Project of Guangzhou City [202102080288, 202007020005]
- RGC Senior Research Fellowship Scheme [SRFS2021-5S01]
- Hong Kong Research Grants Council [PolyU 153058/19P]
- CAS-Croucher Funding Scheme for Joint Laboratories [ZH4A]
- Hong Kong Polytechnic University [1-ZE1C]
- Research Institute for Smart Energy (CDAQ)
- Miss Clarea Au for the Endowed Professorship in Energy [847S]
A novel and universal strategy, called CDs-in-YOHF, is proposed to generate multicolor and long-wavelength RTP by confining various CDs in the YOHF matrix. The mechanism of the triplet emission of CDs is related to the space confinement, the formation of hydrogen bonds and C-F bonds, and the electron-withdrawing fluorine atoms. The resulting CDs@YOHF exhibits excellent photostability, thermostability, chemical stability, and temporal stability.
Carbon dots (CDs) have aroused widespread interest in the construction of room-temperature phosphorescent (RTP) materials. However, it is a great challenge to obtain simultaneous multicolor long-wavelength RTP emission and excellent stability in CD-based RTP materials. Herein, a novel and universal CDs-in-YOHF strategy is proposed to generate multicolor and long-wavelength RTP by confining various CDs in the Y(OH)(x)F3-x (YOHF) matrix. The mechanism of the triplet emission of CDs is related to the space confinement, the formation of hydrogen bonds and C-F bonds, and the electron-withdrawing fluorine atoms. Remarkably, the RTP lifetime of orange-emissive CDs-o@YOHF is the longest among the reported single-CD-matrix composites for emission above 570 nm. Furthermore, CDs-o@YOHF exhibited higher RTP performance at long wavelength in comparison to CDs-o@matrix (matrix = PVA, PU, urea, silica). The resulting CDs@YOHF shows excellent photostability, thermostability, chemical stability, and temporal stability, which is rather favorable for information security, especially in a complex environment.
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