TY - JOUR
T1 - Carbon Dots in Hydroxy Fluorides
T2 - Achieving Multicolor Long-Wavelength Room-Temperature Phosphorescence and Excellent Stability via Crystal Confinement
AU - Liang, Ping
AU - Zheng, Yihao
AU - Zhang, Xingcai
AU - Wei, Haopeng
AU - Xu, Xiaokai
AU - Yang, Xianfeng
AU - Lin, Huihong
AU - Hu, Chaofan
AU - Zhang, Xuejie
AU - Lei, Bingfu
AU - Wong, Wai Yeung
AU - Liu, Yingliang
AU - Zhuang, Jianle
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China (52172142, 12174119, 52073242), the Guangdong Basic and Applied Basic Research Foundation (2020A1515011210, 2022A1515011958), and the Science and Technology Planning Project of Guangzhou City (202102080288, 202007020005). W.-Y.W. acknowledges financial support from the RGC Senior Research Fellowship Scheme (SRFS2021-5S01), the Hong Kong Research Grants Council (PolyU 153058/19P), the CAS-Croucher Funding Scheme for Joint Laboratories (ZH4A), Hong Kong Polytechnic University (1-ZE1C), Research Institute for Smart Energy (CDAQ), and Miss Clarea Au for the Endowed Professorship in Energy (847S).
Publisher Copyright:
© 2022 American Chemical Society. All rights reserved.
PY - 2022/7/13
Y1 - 2022/7/13
N2 - 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)xF3-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.
AB - 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)xF3-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.
KW - carbon dots
KW - hydroxy fluorides
KW - information security
KW - room-temperature phosphorescence
KW - stability
UR - http://www.scopus.com/inward/record.url?scp=85133943391&partnerID=8YFLogxK
U2 - 10.1021/acs.nanolett.2c00603
DO - 10.1021/acs.nanolett.2c00603
M3 - Journal article
C2 - 35700100
AN - SCOPUS:85133943391
SN - 1530-6984
VL - 22
SP - 5127
EP - 5136
JO - Nano Letters
JF - Nano Letters
IS - 13
ER -