Carbon Dots@Upconversion Nanoparticles: Conjugate Manipulation and Luminophor Confinement Enabling Aqueous-Phase Orthogonal Multicolor Phosphorescence-Upconversion Luminescence
文献类型： 外文期刊
作者： Shao, Kang 1 ; Jin, Yuqian 1 ; Pan, Zaifa 1 ; Shi, Yike 1 ; Chen, Jiahong 1 ; Ye, Shiyi 2 ; Wang, Jing 1 ; She, Yuanbin 1 ;
作者机构： 1.Zhejiang Univ Technol, Coll Chem Engn, Hangzhou 310014, Peoples R China
2.Zhejiang Acad Agr Sci, Inst Anim Husb & Vet Sci, Hangzhou 310002, Peoples R China
关键词： aqueous-phase phosphorescence; carbon dots; multicolor luminescence; orthogonal luminescence; upconversion nanoparticles
期刊名称：SMALL （ 影响因子：12.1； 五年影响因子：12.5 ）
ISSN： 1613-6810
年卷期： 2025 年 21 卷 10 期
页码：
收录情况： SCI
摘要： Developing single-particle nanocomposite with aqueous-phase orthogonal multicolor phosphorescence or multimodal luminescence holds great significance for optical coding, anti-counterfeiting encryption, bioimaging, and biosensing. However, it faces challenges such as a limited range of emission wavelengths and difficulties in controlling the synthesis process. In this work, a conjugate structure manipulation integrated luminophor confinement strategy is proposed to prepare carbon dots@upconversion nanoparticles (CDs@UCNPs) featuring aqueous-phase orthogonal multicolor room-temperature phosphorescence-upconversion luminescence (RTP-UCL) through wet-chemical synthetic methods. Four types of CDs are synthesized by introducing molecules with varying degrees of conjugation, while the intersystem crossing process is enhanced by constructing charge-transfer states to narrow the energy gap between the excited singlet and triplet states. Aqueous-phase orthogonal multicolor RTP (green, yellow, and orange) and UCL (blue, green, yellow, and red) are achieved by confining CDs with different conjugation degrees within a NaBiF4 matrix doped with various lanthanide ions. Notably, NaBiF4 UCNPs can crystallize at low temperatures, serving as a matrix to immobilize CDs, thereby preventing their vibration and rotation, and minimizing interference from water and oxygen. Additionally, the versatility of this strategy is demonstrated by constructing multicolor CDs@Cs2NaGdCl6: 5%Yb3+,10%Er3+ perovskite nanocomposites. This strategy offers valuable guidance for the preparation of advanced aqueous-phase orthogonal multicolor materials.
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