Photoluminescent (PL) carbon quantum dots (CQDs) were prepared successfully using a facile and green procedure. They exhibited striking blue fluorescence and excellent optical properties, with a quantum yield as high as 61.44%. Due to the fluorescence quenching effect and the stronger complexing ability of the phosphoric acid group of 1‐hydroxyethane‐1,1‐diphosphonic acid (HEDP) to Fe³⁺, CQDs doped with Fe³⁺ were adequately constructed as an efficient and sensitive fluorescent probe for HEDP‐specific sensing. The proposed fluorescent probe had a sensitive and rapid response in the range 5–70 μM. Furthermore, quantitative molecular surface (QMS) analysis based on the Multiwfn program was applied to explore the complexation mode of HEDP and metal ions. The distribution of electrostatic potential (ESP), average local ionization energy (ALIE), the minimum value points and the position of the lone pair electrons on the surface of molecular van der Waals were further determined. More strikingly, this experiment achieved the quantitative detection of water‐soluble phosphonate‐HEDP, for the first time using fluorescence spectrometry. It has been proved to be an effective and intuitive sensing method for the detection of HEDP in real samples.

中文翻译：

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荧光光谱法可逆检测水溶性膦酸酯-1-羟基乙烷-1,1-二膦酸的高荧光碳量子点的合成和修饰

使用简便且绿色的程序成功制备了光致发光（PL）碳量子点（CQD）。它们表现出惊人的蓝色荧光和出色的光学性能，量子产率高达61.44％。由于荧光猝灭作用和1-羟基乙烷-1,1-二膦酸（HEDP）的磷酸基团对Fe ³⁺的较强配位能力，因此将掺有Fe ^3+的CQD适当地构建为高效且敏感的荧光剂HEDP专用感应的探头。所提出的荧光探针具有在5-70范围内的灵敏和快速反应μM.此外，基于Multiwfn程序的定量分子表面（QMS）分析用于探索HEDP与金属离子的络合模式。进一步确定了静电势（ESP），平均局部电离能（ALIE）的分布，最小值点以及分子范德华表面上孤对电子的位置。更引人注目的是，该实验首次使用荧光光谱法实现了水溶性膦酸酯-HEDP的定量检测。它已被证明是一种检测实际样品中HEDP的有效且直观的传感方法。