A rhodamine-based probe for Fe³⁺ was prepared and confirmed by X-ray crystallography. The probe exhibited highly selective and sensitive recognition toward Fe³⁺ with distinct color change. Interestingly, the probe-Fe³⁺ complex could detect CN⁻ according to the strong co-ordination ability of cyanide to Fe³⁺. The whole recognition mechanism was explored through Job's plot, MS data and theoretical calculations. Importantly, the probe was further used for detecting Fe³⁺ in living cells and mouse, which exhibited excellent fluorescence imaging.

中文翻译：

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一种用于生物成像的新型双功能Fe3 +荧光探针和用于选择性检测CN-的探针-Fe3 +复合物

制备了基于罗丹明的Fe ³⁺探针，并通过X射线晶体学证实。该探针显示出对Fe ^3+的高度选择性和灵敏识别，并具有明显的颜色变化。有趣的是，探针的Fe ³⁺络合物可以检测CN ^-根据氰化物的强的协调能力成Fe ³⁺。通过Job's图，MS数据和理论计算探索了整个识别机制。重要的是，该探针还用于检测活细胞和小鼠中的Fe ³⁺，它们具有出色的荧光成像。