In this study, a rhodamine–acetylferrocene conjugate of RBFc was synthesized and then characterized using spectroscopy and single‐crystal analysis. The chemosensor RBFc exhibited a marked colour change from colourless to pink after binding to Cu²⁺ ions. Importantly, under the presence of the other competing cations in aqueous solution, only Cu²⁺ ions caused spirolactam ring opening in rhodamine B in RBFc, resulting in an enhanced absorbance of ultraviolet light spectra and fluorescence spectra, as well as obvious shifts in cyclic voltammetry curves and differential pulsed voltammetry curves. The novel probe described in this manuscript provides an attractive approach for detecting Cu²⁺ in the presence of other multisignals.

中文翻译：

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具有多信号的Cu2 +选择性裸眼“关闭”荧光探针：色度，荧光，电化学。

在这项研究中，合成了RBFc的若丹明-乙酰基二茂铁结合物，然后使用光谱学和单晶分析对其进行了表征。化学传感器RBFc与Cu ²⁺离子结合后，显示出从无色到粉红色的明显颜色变化。重要的是，在水溶液中存在其他竞争性阳离子的情况下，只有Cu ²⁺离子会导致RBFc中若丹明B中的螺内酰胺开环，从而提高了紫外光谱和荧光光谱的吸收率，以及循环伏安法中的明显变化曲线和微分脉冲伏安曲线。本手稿中描述的新型探针为在存在其他多信号的情况下检测Cu ²⁺提供了一种有吸引力的方法。