Carbon Dots in Hydroxy Fluorides: Achieving Multicolor Long-Wavelength Room-Temperature Phosphorescence and Excellent Stability via Crystal Confinement,Nano Letters

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Carbon Dots in Hydroxy Fluorides: Achieving Multicolor Long-Wavelength Room-Temperature Phosphorescence and Excellent Stability via Crystal Confinement
Nano Letters ( IF 9.6 ) Pub Date : 2022-06-14 , DOI: 10.1021/acs.nanolett.2c00603
Ping Liang _{1,

2} , Yihao Zheng _{1,

2} , Xingcai Zhang _{3,

4} , Haopeng Wei _{1,

2} , Xiaokai Xu _{1,

2} , Xianfeng Yang ₅ , Huihong Lin ₆ , Chaofan Hu _{1,

2} , Xuejie Zhang _{1,

2} , Bingfu Lei _{1,

2} , Wai-Yeung Wong _{7,

8} , Yingliang Liu _{1,

2} , Jianle Zhuang _{1,

2}

Affiliation

Key Laboratory for Biobased Materials and Energy of Ministry of Education/Guangdong Provincial Engineering Technology Research Center for Optical Agriculture, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, People's Republic of China.
Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, People's Republic of China.
School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States.
School of Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.
Analytical and Testing Center, South China University of Technology, Guangzhou 510641, People's Republic of China.
School of Chemical and Environmental Engineering, Hanshan Normal University, Chaozhou 521041, People's Republic of China.
Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy, The Hong Kong Polytechnic University, Hung Hom, Hong Kong People's Republic of China.
Hong Kong Polytechnic University, Shenzhen Research Institute, Shenzhen 518057, People's Republic of China.

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)_xF_3–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.

中文翻译：

羟基氟化物中的碳点：通过晶体限制实现多色长波长室温磷光和出色的稳定性

碳点 (CD) 在室温磷光 (RTP) 材料的构建中引起了广泛的兴趣。然而，在 CD 基 RTP 材料中同时获得多色长波长 RTP 发射和优异的稳定性是一个巨大的挑战。在此，提出了一种新颖且通用的“CDs-in-YOHF”策略，通过将各种 CD 限制在 Y(OH) _x F _{3– x中来生成多色和长波长 RTP}(YOHF) 矩阵。CDs的三重态发射机制与空间限制、氢键和C-F键的形成以及吸电子氟原子有关。值得注意的是，橙色发光 CDs-o@YOHF 的 RTP 寿命在已报道的 570 nm 以上发射的单 CD 矩阵复合材料中是最长的。此外，与 CDs-o@matrix（基质 = PVA、PU、尿素、二氧化硅）相比，CDs-o@YOHF 在长波长下表现出更高的 RTP 性能。所得CDs@YOHF显示出优异的光稳定性、热稳定性、化学稳定性和时间稳定性，这对信息安全非常有利，尤其是在复杂环境中。

更新日期：2022-06-14

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