Facile one-step solvothermal synthesis of a luminescent europium metal-organic framework for rapid and selective sensing of uranyl ions
Facile one-step solvothermal synthesis of a luminescent europium metal-organic framework for rapid and selective sensing of uranyl ions
复制标题
轻松一步溶剂热合成发光铕金属有机骨架，用于快速选择性传感铀酰离子
DOI：
10.1007/s00216-019-01875-2
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发表时间：
2019-07-01
影响因子：
4.3
通讯作者：
Liu, Huwei
中科院分区：
文献类型：
--
作者：
Li, Linnan;Shen, Sensen;Liu, Huwei
研制一种简单、经济、便携、选择性好的铀敏感材料在放射性核素环境监测中具有重要意义。本文报道了一种新颖的铕金属有机骨架（Eu-MOF），它具有大量的刘易斯碱性位点，可与铀酰离子（UO 22+）结合，而铀酰离子是铀在溶液中最常见的存在形式。该介孔结构由铕节点和柔性含氮配体组成，沿着c轴具有29.2 × 20.5 2孔道.此外，所获得的材料显示三价Eu 3+的特征荧光，并可应用于作为关闭传感器探针针对UO 22+在溶液中。与UO 22+相比，一系列潜在的干扰离子发生差异荧光猝灭，检测限低至0.9 μM，响应迅速。图形摘要
A simple, cost-effective, and portable uranium sensory material with adequate selectivity is increasingly urgent and would be of great importance in environmental monitoring of radionuclides. Herein, we report a novel luminescent europium metal-organic framework (Eu-MOF) with plenty of Lewis basic sites for binding uranyl ions (UO22+), the most common form of uranium in solution, through a facile one-step solvothermal synthetic route. The mesoporous structure consists of europium nodes and flexible nitrogen-containing ligands with a 29.2 × 20.5 Å2channel along the c-axis. Furthermore, the obtained material displays characteristic fluorescence of trivalent Eu3+and could be applied as a turn-off sensory probe targeting UO22+in solution. Differential fluorescent quenching occurred upon a series of potential interfering ions compared to UO22+and the detection limit as low as 0.9 μM was achieved with a rapid response.Graphical abstract