Zheng Yabin, Wan Yudong, Wei Yun, Yu Yingchun
State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 3rd Ring North East Road, Chaoyang District, Beijing, 100029, China.
J Fluoresc. 2023 Sep;33(5):1941-1948. doi: 10.1007/s10895-023-03154-x. Epub 2023 Mar 14.
Mercury ion is a global toxic and hazardous environmental pollutant. In this work, a facile and selective ratiometric fluorescent probe was constructed for the detection of mercury ion. The dual-emissive carbon dots (BYCDs) were fabricated by a one-pot hydrothermal method utilizing o-phenylenediamine and glycine as raw materials, and the prepared BYCDs had two independent fluorescence emission peaks at 426 nm and 543 nm under a single excitation wavelength. Based on the change of the intensity ratio of the two fluorescence emission peaks after the addition of Hg, a sensitive and selective ratiometric fluorescent probe based on BYCDs was constructed for the detection of Hg with good linearity ranging from 0.95-50 μM and a detection limit of 0.27 μM. In addition, the recovery of this probe was satisfactory in the standard addition experiments of real water samples, and it could be applied to the analysis of Hg in real water samples.
汞离子是一种全球性的有毒有害环境污染物。在这项工作中，构建了一种简便且具有选择性的比率荧光探针用于检测汞离子。以邻苯二胺和甘氨酸为原料，通过一锅水热法制备了双发射碳点（BYCDs），所制备的BYCDs在单一激发波长下有两个独立的荧光发射峰，分别位于426 nm和543 nm。基于加入Hg后两个荧光发射峰强度比的变化，构建了一种基于BYCDs的灵敏且具有选择性的比率荧光探针用于检测Hg，线性良好，范围为0.95 - 50 μM，检测限为0.27 μM。此外，该探针在实际水样的标准加入实验中回收率令人满意，可应用于实际水样中Hg的分析。
