A dual-mode chemosensor based on phenanthroline dicarbohydrazide (L) was synthesized for selective and sensitive monitoring of Zr⁴⁺. The selective distinct colorimetric response and a turn-on fluorescence were observed upon interaction of L with Zr⁴⁺ in DMSO:water (8:2, v/v) media. The sensor L could form 1:2 stoichiometric complex with Zr⁴⁺ with an association constant of 1 × 10⁴ M⁻¹ by using Jobs and Benesi-Hilderbrand (BH) methods. The sensor could work in the wide pH range of 3 to 8 without much interference from other common metal ions. The limit of detection (LOD) of Zr⁴⁺ was found to be 180 nM and 9 nM by UV–visible and spectrofluorometric analysis respectively. The binding interaction of L with Zr⁴⁺ was confirmed by ¹H NMR and DFT analysis. Further, the ligand L was applied for the quantitative determination of Zr⁴⁺ in various water samples.

合成了基于菲咯啉二碳酰肼（L）的双模式化学传感器，用于选择性和灵敏地监测Zr ⁴⁺。当L与Zr ⁴⁺在DMSO：水（8：2，v / v）介质中相互作用时，观察到选择性独特的比色响应和开启荧光。传感器L可以通过Jobs和Benesi-Hilderbrand（BH）方法与Zr ⁴⁺形成1：2的化学计量配合物，缔合常数为1×10 ⁴ M ^-1。该传感器可以在3至8的宽pH范围内工作，而不受其他常见金属离子的干扰。Zr ^4+的检出限（LOD）通过紫外可见分光光度法和荧光分光光度法分析发现分别为180 nM和9 nM。¹ H NMR和DFT分析证实了L与Zr ⁴⁺的结合相互作用。此外，将配体L用于各种水样品中Zr ⁴⁺的定量测定。