Tian Min, Zhang Junqiu, Liu Yaoming, Wang Yingte, Zhang Yong
School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, Shanxi, China; State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China; Key Laboratory of Coal Science and Technology of Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China.
School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, Shanxi, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2021 May 5;252:119541. doi: 10.1016/j.saa.2021.119541. Epub 2021 Feb 3.
In this work, a facile, economical and green method for the preparation of nitrogen-doped carbon dots (N-CDs) was established via hydrothermal synthesis using p-phenylenediamine and asparagine. The as-prepared N-CDs were characterized by Transmission electron microscopy (TEM), X-ray diffraction patterns (XRD), Raman, Fourier transform infrared spectroscopy (FT-IR) and other methods. Furthermore, the N-CDs showed high sensitivity toward cobalt (II) ion (Co). Interestingly, the fluorescence of N-CDs was quenched linearly in the 0.3-65 μM Co concentrations range, under the optimum conditions, displaying a fast response toward Co with the detection limit as low as 22 nM. Simultaneously, this method was applied in the analysis of water samples with considerable results. Finally, the N-CDs were successfully utilized as the imaging probe of live root tip tissue of Arabidopsis thaliana, demonstrating that the N-CDs possessed significant theoretical research meaning in the fields of biological correlation analysis, environmental monitoring and disease diagnosis.
在这项工作中，通过使用对苯二胺和天冬酰胺的水热合成法，建立了一种简便、经济且绿色的制备氮掺杂碳点（N-CDs）的方法。通过透射电子显微镜（TEM）、X射线衍射图谱（XRD）、拉曼光谱、傅里叶变换红外光谱（FT-IR）等方法对所制备的N-CDs进行了表征。此外，N-CDs对钴（II）离子（Co）表现出高灵敏度。有趣的是，在最佳条件下，N-CDs的荧光在0.3 - 65 μM的Co浓度范围内呈线性猝灭，对Co呈现快速响应，检测限低至22 nM。同时，该方法应用于水样分析，结果可观。最后，N-CDs成功用作拟南芥活根尖组织的成像探针，表明N-CDs在生物相关性分析、环境监测和疾病诊断等领域具有重要的理论研究意义。
