Zhang Yaqing, Cheng Sijie, Wang Xin, Wang Yingte, Zhang Yong
School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, China.
Luminescence. 2022 May;37(5):766-776. doi: 10.1002/bio.4219. Epub 2022 Mar 10.
In this work, a type of carbon quantum dots (CQDs) with bright blue emission was readily fabricated through one-step hydrothermal treatment from Atractylodes III. We explored the surface morphology and optical properties of the CQDs using transmission electron microscopy, X-ray diffraction patterns, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy and ultraviolet-visible light spectrophotometry. The obtained CQDs possessed good photoluminescence properties, water solubility, and biocompatibility. The fluorescence quantum yield of these was 3.72%. It was found that the fluorescence intensity of CQDs was quenched by picric acid. After adding lead (II), the fluorescence could be effectively recovered. Therefore, an 'off-on' fluorescence probe was designed to detect lead (II) in the range 0-580 μM and the limit of detection was 0.068 μM. In addition, the experiments showed that the CQDs could be successfully used in bioimaging and as a hidden fluorescent ink.
在本工作中，通过对白术III进行一步水热法处理，轻松制备出了一种具有亮蓝色发射的碳量子点（CQDs）。我们利用透射电子显微镜、X射线衍射图谱、X射线光电子能谱、傅里叶变换红外光谱和紫外-可见分光光度法探究了CQDs的表面形态和光学性质。所制备的CQDs具有良好的光致发光性能、水溶性和生物相容性。其荧光量子产率为3.72%。发现苦味酸会猝灭CQDs的荧光强度。加入铅（II）后，荧光可有效恢复。因此，设计了一种“关-开”型荧光探针用于检测0-580μM范围内的铅（II），检测限为0.068μM。此外，实验表明CQDs可成功用于生物成像并作为一种隐形荧光墨水。
