高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

一维铀酰羧酸膦酸配位聚合物对水溶液中Fe3+的高灵敏和选择性检测

温哥华,薛静漪   

  1. 山西电子科技学院, 新能源与材料工程学院
  • 收稿日期:2025-06-11 修回日期:2025-09-16 出版日期:2025-09-18 发布日期:2025-09-18
  • 通讯作者: 温哥华 E-mail:wengehua@sxdzkj.edu.cn
  • 基金资助:
    山西省大学生创新创业训练计划项目(批准号: S202413537003)、山西电子科技学院科研启动经费(批准号: 2023RKJ035)和山西省高等学校科技创新项目(批准号: 2023L447)资助

One-Dimensional Uranyl Carboxyphosphonate Coordination Polymer for Highly Sensitive and Selective Detection of Fe3+ ion in Aqueous Media

WEN gehua, XUE jingyi   

  1. College of New Energy and Materials Engineering, Shanxi University of Electronic Science and Technology
  • Received:2025-06-11 Revised:2025-09-16 Online:2025-09-18 Published:2025-09-18
  • Contact: Ge-Hua Wen E-mail:wengehua@sxdzkj.edu.cn
  • Supported by:

    Supported by the College Students' Innovation and Entrepreneurship Training Program Project of Shanxi Province(No.S202413537003), Research Initiation Fund of Shanxi University of Electronic Science and Technology (No.2023RKJ035) and the Shanxi Province Higher Education Science and Technology Innovation Project (No.2023L447)

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摘要： 通过邻羧基苯亚甲基膦酸(2-pmbH3)配体与铀酰离子构筑了一维铀酰羧酸膦酸配位聚合物(UO2)(2-pmbH2)2 (1). 其中膦酸基团通过两个氧原子桥联铀酰离子形成一维链, 链骨架两侧有序分布着质子化的羧酸基团和膦酸氧原子, 链与链之间通过氢键相互作用形成超分子网络. 此外, 化合物1展现出较高的水稳定性(在pH=1-12保持稳定)和良好的发光性能(量子产率QY=14.1%). 通过荧光测试对化合物1在不同金属离子水溶液中发光强度的变化分析发现, 仅Fe3+可使化合物1的最强特征发射峰(λem=524 nm)发生> 95 %的猝灭效率, 表现出显著的选择性. 通过建立Fe3+浓度与化合物1荧光强度的定量关系, 该传感材料在低浓度(0-0.04 mmol·L-1)范围内呈现良好的线性响应（R2= 0.99）以及低的检测限(3.67 ×10-7 M). 基于此, 化合物1凭借其独特的分子结构、良好的发光特性和较高的水环境稳定性, 以及对水溶液中的Fe3+离子表现出的高的选择性和灵敏的淬灭响应特征, 在金属阳离子传感检测方面显示出优异性能潜力.

关键词: 铀酰羧酸膦酸配位聚合物, 荧光, 三价铁离子(Fe3+), 金属离子检测

Abstract: A one-dimensional chain-like uranyl carboxyphosphonate coordination polymer, (UO2)(2-pmbH2)2 (1), was synthesized based on the 2-pmbH3 ligand with UO22+. Where the phosphonate groups bridge uranyl ions through two oxygen atoms to form one-dimensional chains, with protonated carboxyl groups and phosphonate oxygen atoms orderly distributed on both sides of the chain backbone, and interchain hydrogen-bond interactions forming a supramolecular structure. Furthermore, compound ?1? demonstrates ?high aqueous stability(pH=1-12)? and ?favorable photoluminescence properties(QY=14.1 %)?. Analysis of changes in the luminescence intensity of compound ?1? immersed in aqueous solutions containing various metal ions revealed that only Fe3+ induced ?significant quenching (>95% efficiency)? of its ?strongest characteristic emission peak? (λem=524 nm), indicating ?remarkable selectivity?. Establishing a ?quantitative relationship curve? between Fe3+ concentration and luminescence intensity confirmed a ?good linear response? (R2=0.99) ?within the low-concentration range? (0-0.04 mmol·L-1) with a low detection limit (3.6710-7 M). Therefore, ?owing to? its ?unique molecular structure?, favorable photoluminescence properties?, ?high stability in aqueous environments?, as well as its demonstrated ?high selectivity? and ?sensitive quenching response? towards Fe3+ ions, compound ?1? demonstrates excellent performance potential in metal cation sensing and detections.

Key words:

Uranyl carboxyphosphonate coordination polymer, luminescence, Fe3+, metal ions detection

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