A novel rhodamine derivative (Rh-C), synthesized by the reaction of rhodamine ethylenediamine and cinnamoyl chloride, was evaluated as a chemoselective Hg2+ ion sensor. Addition of Hg2+ to an ethanol aqueous solution of the Rh-C resulted in a color change from colorless to obvious pink color together with distinctive changes in UV–vis absorption spectrum and fluorescence spectrum. However, other common alkali-, alkaline earth-, transition- and rare earth metal ions induced no or minimal spectral changes. The interaction of Hg2+ and sensor Rh-C was proven to adopt a 1:1 binding stoichiometry and the recognition process is reversible. The chemosensor displayed a linear response to Hg2+ in the range of 0.4–5 μM with a detection limit of 7.4 × 10−8 M. The sensor Rh-C was also successfully applied to the imaging of Hg2+ in HL-7702 cells.
通过
罗丹明乙二胺和
肉桂酰氯反应合成了一种新型
罗丹明衍
生物(Rh-C),作为
化学选择性 Hg2+ 离子传感器进行了评估。将 Hg2+ 添加到 Rh-C 的
乙醇水溶液中,导致颜色从无色变为明显的粉红色,同时紫外可见吸收光谱和荧光光谱发生明显变化。然而,其他常见的碱
金属、碱土
金属、过渡
金属和稀土
金属离子不引起光谱变化或引起最小的光谱变化。 Hg2+与传感器Rh-C的相互作用被证明采用1:1的结合
化学计量,并且识别过程是可逆的。该
化学传感器对 Hg2+ 在 0.4–5 µM 范围内表现出线性响应,检测限为 7.4 × 10−8 M。传感器 Rh-C 还成功应用于 HL-7702 细胞中 Hg2+ 的成像。