Abstract
The advancement of industrialization has resulted in a significant influx of heavy metal ions into the ecological environment. Among these, the impact of Hg2+ on both plant growth and human health has garnered widespread attention. Therefore, it is imperative to address the removal of Hg2+ from the ecological environment. Here, our team has developed a near-infrared fluorescence probe, SN-Hg, for the detection of Hg2+. This probe offers several advantages including excellent selectivity, high sensitivity (LOD=85 nM), rapid response time and naked eye visualization. In addition, SN-Hg was successfully used to image the cells and the roots of plant (Platycodon grandiflorum seedlings) in situ. Moreover, the SN-Hg enabled 3D imaging of Hg2+ distribution in plants with a penetration depth of 80 μm. More importantly, the inhibitory effects of Se4+ and Zn2+ on the uptake of Hg2+ in Platycodon grandiflorum were further verified by SN-Hg. This study provides a foundation for soil protection and plant growth, as well as offering a new perspective for the removal of heavy metal pairs in ecological environments.
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