Citation: Zijuan LI, Xuan LÜ, Jiaojiao CHEN, Haiyang ZHAO, Shuo SUN, Zhiwu ZHANG, Jianlong ZHANG, Yanling MA, Jie LI, Zixian FENG, Jiahui LIU. Synthesis of visual fluorescence emission CdSe nanocrystals based on ligand regulation[J]. Chinese Journal of Inorganic Chemistry, ;2025, 41(2): 308-320. doi: 10.11862/CJIC.20240138 shu

Synthesis of visual fluorescence emission CdSe nanocrystals based on ligand regulation

Zijuan LI ^1,, ,
Xuan LÜ ¹ ,
Jiaojiao CHEN ¹ ,
Haiyang ZHAO ¹ ,
Shuo SUN ¹ ,
Zhiwu ZHANG ¹ ,
Jianlong ZHANG ¹ ,
Yanling MA ¹ ,
Jie LI ¹ ,
Zixian FENG ¹ ,
Jiahui LIU ²

1.
Zhangjiakou Cigarette Factory Co., Ltd., Zhangjiakou, Hebei 075000, China
2.
College of Chemical Engineering and Materials Science, Tianjin University of Science & Technology, Tianjin 300457, China

Corresponding author: Zijuan LI, 38100443@qq.com
Received Date: 22 April 2024
Revised Date: 14 September 2024

Figures(15)

The effects of oleic acid (OA) and oleylamine (OLA) ligand additions on the fluorescence properties of CdSe nanocrystals were investigated, and the mechanisms of OA and OLA ligands in the growth process of CdSe nanocrystals were analyzed in depth. The optical properties, crystal structure, micro-morphology, and size distribution of CdSe nanocrystals were characterized and analyzed using various characterization methods. The results indicate that the emission peak of the CdSe nanocrystal underwent a red shift upon the addition of OA ligands, and the magnitude of the shift was directly proportional to the number of ligands added. The emission peak of CdSe nanocrystal can be adjusted within the range of 548.5-604.0 nm. When a small amount of OLA ligand was added, the peak shifted towards blue. However, with an increase in the amount of OLA ligand, the peak gradually shifted towards red, with an adjustable range of 548.0-584.4 nm. The layer-by-layer growth method, with the introduction of OA and OLA ligands, can effectively improve the bimodal emission peak phenomenon caused by multiple layer-bylayer growth. Finally, by adjusting the preparation process, four CdSe nanocrystals with fluorescence emission visualization separation were prepared with good size distribution, high photoluminescence quantum yield (PLQY) and excellent resistance to photobleaching.
- CdSe nanocrystal,
- ligand regulation,
- layer-by-layer growth method,
- oleic acid,
- oleylamine
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