A conjugated fluorescent polymer sensor with amidoxime and polyfluorene entities for effective detection of uranyl ion in real samples
A conjugated fluorescent polymer sensor with amidoxime and polyfluorene entities for effective detection of uranyl ion in real samples
复制标题
具有偕胺肟和聚芴实体的共轭荧光聚合物传感器，可有效检测实际样品中的铀酰离子
DOI：
10.1016/j.saa.2020.118864
复制
发表时间：
2021-01-05
影响因子：
4.4
通讯作者：
Wang, Hongqing
中科院分区：
文献类型：
--
作者：
Hu, Qinghua;Zhang, Wenfeng;Wang, Hongqing
研制水介质中痕量铀酰离子化学传感器是核能可持续发展和环境保护面临的重要挑战。本工作设计并制备了一种基于胺基和聚荧烯的共轭荧光聚合物传感器P2，该传感器在DMA/H2O(v/v=20：80，pH=6.0)溶液中对铀酰离子表现出良好的亲水性，与铀酰离子有良好的接触，并且在其他金属离子存在下也具有选择性和灵敏度。它具有良好的热稳定性和较大的斯托克斯位移(108 Nm)。重要的是，P2与铀结合时发生了荧光猝灭。该传感器在10~200 nm范围内与UO22+浓度呈良好的线性关系，最低检出限为7.4×10(-9)M。更重要的是，该传感器可以成功地用于环境溶液中铀酰离子的检测。这项工作表明，含胺肟基团的共轭荧光聚合物将成为环境样品中铀酰离子的潜在传感器。(C)2020爱思唯尔B.V.保留所有权利。
It is an important challenge to develop a chemosensor for trace uranyl ion in an aqueousmediumfor sustainable development of nuclear energy and environmental conservation. A conjugated fluorescent polymer sensor P2 based on amidoxime groups and polyfluorene, which showed good hydrophilous resulting adequate contact with uranyl ions and selectivity and sensitivity even in the presence of other metal ions in DMA/H2O (v/v = 20:80, pH= 6.0) solution, for uranyl ion was designed and prepared in this work. And it possesses good thermal stability and a larger Stokes shift (108 nm). Importantly, the fluorescence quenching occurredwhen P2 combining uranium. It had a good linear relationship with UO22+ concentration in the range of 10 to 200 nM with a fairly low LOD 7.4 x 10(-9) M. Interaction properties between the sensor P2 and UO22+ and the fluorescent mechanism were investigated by density functional theory (DFT). More importantly, the sensor can be successfully used for the detection of uranyl ion in environmental solutions. This work suggests that conjugated fluorescent polymer with amidoxime groups will be a prospective sensor of uranyl ion in the environmental sample. (C) 2020 Elsevier B.V. All rights reserved.