对于Pb2+的高度选择性比度传感器,基于光 Zn(II) 协调聚合物与硫基碳酸盐. 水晶结构和光谱学研究
Georgina M Otero-Fuentes1, Victor Sánchez-Mendieta2, Alejandro Sánchez-Ruiz3
1Facultad de Química, Universidad Autónoma del Estado de México, Paseo Colón y Paseo Tollocan, Toluca, Estado de México, 50120, México.
Journal of fluorescence
|May 28, 2024
概括
研究人员开发了新的发光协调聚合物,用于检测水中的离子 (Pb2+). 这些材料具有很高的选择性和灵敏性,为环境监测提供了一种新方法.
科学领域:
- 无机化学 无机化学
- 分析化学 分析化学
- 环境化学环境化学
背景情况:
- 在水性环境中选择性检测重金属离子对于环境和人类健康至关重要.
- 发光协调聚合物为敏感和选择性的化学传感应用提供了潜力.
- 现有的离子检测方法在复杂矩阵中经常面临选择性和灵敏性的挑战.
研究的目的:
- 为了合成和表征新的水稳定2D协调聚合物.
- 为了研究这些聚合物的发光特性,用于阴离子传感.
- 评估在水溶液中对离子 (Pb2+) 的选择性和敏感检测.
主要方法:
- 合成了两种新的2D协调聚合物的合成:{[Zn2(H2O) 2(tdc) 2(bpy) ]·(H2O)}n和[Zn(tdc) ((tmb) ]n.
- 使用单晶X射线衍射的结构确定.
- 光发光谱学用于在20%的水性乙醇中进行传感研究,包括对各种金属离子的选择性测试.
主要成果:
- 两种合成的Zn-协调聚合物都表现出光稳定性和强烈的发光.
- 聚合物2证明了Pb2+的高效光比度传感,具有较高的选择性比Cu2+,Cd2+和Hg2+等常见干扰离子.
- 实现了Pb2+的1.78 ± 10μM的低检测极限,对Hg2+的选择性是一个显著的进步.
结论:
- 灵活的发光Zn-协调聚合物可以有效地用于在水性介质中选择性和直接检测Pb2+.
- 开发的传感器在环境监测应用中表现出有希望的性能.
- 这项工作为在水质评估中未经探索的这种材料的使用开辟了新的途径.
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