Wang Minhui, Dong Xuemei, Guo Beibei, Wang Dinghai, Tang Yecang
College of Chemistry and Materials Science, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, Anhui Normal University, Wuhu, 241000, China.
J Fluoresc. 2025 Jan 7. doi: 10.1007/s10895-024-04131-8.
The identification of ClO and iron ions in water medium is a difficult task and has been one of the hot issues in analytical chemistry. For this objective, we synthesized carbon nanoparticles (CNPs) through a solvothermal reaction between 1, 3, 5-trimesic acid and o-phenylenediamine, which served as a sequential fluorescent probe for ClO and Fe ions. The obtained CNPs were spherical particles with a diameter of 26.5 nm, exhibiting excellent fluorescence stability under a wide pH range, high ionic strength, and UV irradiation. Interestingly, the fluorescence of CNPs was selectively enhanced in the presence of ClO, and the resultant enhanced emission was extremely quenched by Fe. In view of this, a "turn-on-off" fluorescent probe was established, which possessed wonderful sensitivity and selectivity for quantitative analysis of ClO and Fe, with corresponding detection limits of 0.15 µM and 0.088 µM, respectively. In addition, the practicality and viability of the developed probe were validated by quantifying ClO and Fe in tap water and river water.
在水介质中鉴定次氯酸根（ClO）和铁离子是一项艰巨的任务，一直是分析化学领域的热点问题之一。为此，我们通过1,3,5-苯三甲酸与邻苯二胺之间的溶剂热反应合成了碳纳米颗粒（CNPs），其作为ClO和铁离子的顺序荧光探针。所制备的CNPs为直径26.5 nm的球形颗粒，在较宽的pH范围、高离子强度和紫外线照射下表现出优异的荧光稳定性。有趣的是，在ClO存在下CNPs的荧光被选择性增强，而增强后的发射光被铁离子极度淬灭。鉴于此，建立了一种“开-关”荧光探针，该探针对ClO和铁离子的定量分析具有出色的灵敏度和选择性，其相应的检测限分别为0.15 μM和0.088 μM。此外，通过对自来水和河水中ClO和铁离子的定量分析验证了所开发探针的实用性和可行性。
