Herein, we rationally designed and synthesized novel green-emitting fluorescent carbon dots (CDs) through cross amide formation of two precursors, benzene-1,3,5-triamine trihydrochloride and trimethyl 1,3,5-benzenetricarboxylate, under hydrothermal treatment. The average particle size of the CDs was ∼2.7 nm with graphitic carbon structures. The obtained CDs showed good photoluminescent properties with a quantum yield of up to 11.2%. The carbon dots showed good fluorescence sensitivity and selectivity for Hg²⁺, and the LOD and LOQ values were 17.5 pM and 58.3 pM in the range of 0.1–0.8 μM, which could be successfully applied to Hg²⁺ detection in real water samples as well as intracellular Hg²⁺ fluorescence detection.

在此，我们通过两种前体苯-1,3,5-三胺三盐酸盐和1,3,5-苯三甲酸三甲酯在水热处理下形成交叉酰胺，合理设计并合成了新型绿光荧光碳点（CD）。CD 的平均粒径为 ∼2.7 nm，具有石墨碳结构。所得CD表现出良好的光致发光性能，量子产率高达11.2%。碳点对Hg ²⁺表现出良好的荧光灵敏度和选择性，在0.1~0.8 μM范围内LOD和LOQ值分别为17.5 pM和58.3 pM，可成功应用于实际水样中Hg ^{2+ 的}检测。以及细胞内Hg ²⁺荧光检测。